MS27183-42

MS2718342 Flat Washer

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Quality Commitment

Serving our customers with quality and safety first.

  •   AS9120 Certified
  •   Audited supply chain
  •   ITAR Registered
  •   DDTC Registered
  •   HAZMAT Certified
  •   Customer service objectives
  •   Every product 100% inspected
AS9120 Certified by SAI Global

Datasheet. MS27183-42 specification

Cross-sectional Shape Style
The style designation indicating the configuration that most nearly corresponds to the cross-sectional shape of the item.

rectangular

Hole Diameter
The length of a straight line which passes through the center of a hole,and terminates at the circumference.

0.214in. and 0.227in. ⁓15/64"

Peripheral Shape Style
The style designation indicating the configuration that most nearly corresponds to the peripheral shape of the item.

round

Center Hole Shape Style
The style designation indicating the configuration that most nearly corresponds to the shape of the center hole.

1 round

Thickness
A measurement of the smallest dimension of an item,in distinction from length or width.

0.036in. and 0.065in. ⁓5/64"

Overall Diameter
A measurement of the longest straight line across a circular cross-sectional plane.

0.495in. and 0.515in. ⁓33/64"

Material
The chemical compound or mechanical mixture properties of which the item is fabricated.

steel

Material Document And Classification
The specification,standard,or manufacturers reference,and the classification designation,such as class,condition,temper,and the like,that identifies the material.

66 fed std single material response

Surface Treatment
The metallic,nonmetallic,and/or chemical properties with which the item is plated,dipped,and/or coated.the treatment is designed to protect the surface(s) and cannot be wiped off.

cadmium and chromate

Surface Treatment Document And Classification
The specification,standard,or manufacturers reference,and the classification designation,such as type,class,grade,and the like,that identifies the surface treatment material.

QQ-P-416, ty 2, cl 3 fed spec single treatment response

Nondefinitive Spec/std Data
The number,letter,or symbol that indicates the type,style,grade,class,and the like,of an item in a nonidentifying specification or standard.

a type and 1 grade and a class

Answers.

What quantity is this sold in?

1HD

What material is the flat washer made of ?

Steel

What is the inside hole diameter?

0.214 inches minimum and 0.227 inches maximum

What is the NSN for MS27183-42?

5310-00-014-5850

How is this classified for shipping?

Schedule B number: 7318220000
nmfc 194160
Washers other than lock washers, iron or steel

What's the federal classification of MS27183-42?

FSC 5310 ⁓ Nuts and washers

Note-nuts and washers, including specially designed, are to be classified in this fsc. a. nuts are a small metal block made in a variety of shapes such as square and hexagonal which is drilled and internally threaded. b. washers are a perforated piece of metal, leather, or other materials of various shapes or forms. they are used primarily as a seat for a bolt, nut, screw, rivet or nail to distribute pressure and prevent endwise motion over an area and/or to prevent movement between two parts by means of restraining features created by the shape of its edges.

Excluding bearing thrust washers (fsc 3120); shims (fsc 5365); ring spacers (fsc 5365); plate spacers (fsc 5365); lock rings (fsc 5365).

NSN 5310-00-014-5850 WASHER,FLAT

cadmium surface treated 0.214" hole diameter

NIIN
000145850
NIIN Date
05/10/68
Schedule B
7318220000 
Name Code
13393
FIIG
A022B0
Item Weight
0.200lbs
Item Dimensions
--
QUP
Historical Price
$2.35 HD
DEMIL / ITAR
Uncontrolled item (Code A)
Hazmat
No hazard information available from HMIRS.
MSDS
N/A
Precious Metals
No precious metals
Enviromental
N/A
Electrostatic ESD & EMI
No ESD or EMI sensitivity

Other Part Numbers Parts with same form, fit, and function by other manufacturers

1. FFW92 Cage 81348
2. 1379HX1 Cage 45152
3. 5-13-2682-2-27 Cage 81337
4. 13207E5071FN48 Cage 97403
5. TM SG18-LR-MMA-020 7 33-8 Cage 53711
6. 526-1009 Cage 44940
7. LA-1207-29 Cage 46717
8. 2077521 Cage 7X677
9. FFW92TYPEAGRADE1CLASSASIZE10 Cage 81348
10. D301293 FIND 8 Cage 3X894
11. 122-2422328 PC 29 Cage 53711
12. 120391 Cage D9182
13. 201007 Cage D9182
14. 9421089 Cage 11862
15. 70026-42 Cage 95097
16. 2077521 Cage 11862
17. 10082352 Cage A486G
18. 5310PL0656425 Cage 9009H
19. 5310000145850 Cage SCY13
20. 53100145850 Cage SCY13
21. 1379HX1 Cage 75Q65

Major End Users Countries and entities

  • - National Aeronautics And Space Administration 
  • - Department of The Navy 
  • - Department of The Army 
  • - Department of The Air Force 
  • - U.s. Marine Corps 
  • - Federal Aviation Administration 
  • - U.s. Coast Guard 
  • - Austria 
  • - Finland 
  • - Lithuania 
  • - Poland 
  • - Brazil 
  • - Spain 
  • - Singapore 
  • - Kuwait 
  • - Morocco 
  • - Saudi Arabia 
  • - Malaysia 
  • - Australia 
  • - Belgium 
  • - Canada 
  • - New Zealand 
  • - France 
  • - Germany 
  • - Republic of Korea 
  • - United Kingdom 
  • - Netherlands 
  • - Portugal 
  • - Italy 
  • - Denmark 
  • - Norway 
  • - Greece 
  • - Turkey 
  • - Nato Maintenance And Supply Agency 

Major End Items End use applications

  • - Tactical (gateway) data network an/tsq-222
  • - Control center, comm. tech. (06m jul83) (an/tsq-84)
  • - Air conditioner, mcs vertical, 60k btu, f6ot-2hs
  • - Fuel dispensing system, tact airfld (3id) (m1966)
  • - Fuel system, amphibious assault, 600,000 gal cap (3id)
  • - Telephone set, tam a26357
  • - Truck, ambulance, 2-litter, soft top, 1 1/4 ton hmmwv
  • - Truck, utilities, tow carrier-w/sa, 1 1/4 ton, w/winch, hmmwv
  • - Light armored vehicle, air defense, lav-ad
  • - System control group, technical (dtc) facility, an/tsq-227
  • - X-ray apparatus,radiographic,industrial
  • - Heater,duct type,portable
  • - Test set,telephone
  • - Generator set,gas turbine engine
  • - Engine,diesel
  • - Power supply
  • - Power supply
  • - Generator set,diesel engine
  • - Generator set,diesel engine
  • - Generator set,diesel engine
  • - Telephone set
  • - Truck,tank
  • - Receiver-transmitter,radio
  • - Test set,navigation
  • - Truck,lift,fork
  • - Truck,lift,fork
  • - Truck,lift,fork
  • - Truck,lift,fork
  • - Truck,lift,fork
  • - Truck,lift,fork
  • - Truck,lift,fork
  • - Truck,lift,fork
  • - Truck,lift,fork
  • - Test set,semiconductor device
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Motor-generator
  • - Chiller unit,coolan
  • - Exciter assembly
  • - Sound ranging set
  • - Entrance,protective,pressurized
  • - Electronic shop,semitrailer mounted
  • - Electronic shop,semitrailer mounted
  • - Filter unit,gas-particulate
  • - Power supply
  • - Heater,duct type,portable
  • - Cylinder assembly,actuating,linear
  • - Testing kit,petroleum
  • - Power plant,electric,trailer mounted
  • - Beacon set,radio
  • - Truck,fire fighting
  • - Receiver-transmitter,radar
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Analyzer,electrical pulse
  • - Plug-in unit,electrical-electronic test equipment
  • - Truck,tank
  • - Plug-in unit,electrical-electronic test equipment
  • - Speech equipment
  • - Recovery vehicle,full tracked
  • - Recovery vehicle,full tracked
  • - Recovery vehicle,full tracked
  • - Recovery vehicle,full tracked
  • - Recovery vehicle,full tracked
  • - Recovery vehicle,full tracked
  • - Recovery vehicle,full tracked
  • - Generator set,diesel engine
  • - Truck,aircraft cargo loading-unloading
  • - Generator set,diesel engine
  • - Generator set,diesel engine
  • - Generator set,diesel engine
  • - Generator set,diesel engine
  • - Heater,immersion,liquid fuel fired
  • - Unloader assembly,g
  • - Microscope,telescop
  • - Test set,guided missile system
  • - Module,voltage supp
  • - Public address set
  • - Teletypewriter
  • - Power supply
  • - Oscilloscope
  • - Generator,signal
  • - Laboratory,petroleum,semitrailer mounted
  • - Laboratory,petroleum,semitrailer mounted
  • - Laboratory,petroleum,semitrailer mounted
  • - Laboratory,petroleum,semitrailer mounted
  • - Laboratory,petroleum,semitrailer mounted
  • - Laboratory,petroleum,semitrailer mounted
  • - Laboratory,petroleum,semitrailer mounted
  • - Laboratory,petroleum,semitrailer mounted
  • - Laboratory,petroleum,semitrailer mounted
  • - Laboratory,petroleum,semitrailer mounted
  • - Laboratory,petroleum,semitrailer mounted
  • - Motor-generator
  • - Monitor assembly,un
  • - Telephone set
  • - Teletypewriter
  • - Generator,signal
  • - Loader,scoop type
  • - Loader,scoop type
  • - Rifle,recoilless,90 millimeter
  • - Resistor,decade
  • - Recording set,weather data
  • - Recording set,weather data
  • - Heater,space
  • - Test set,radio
  • - Semitrailer,van
  • - Power supply
  • - Radar set subassembly
  • - Generator,signal
  • - Combat engineer vehicle,full tracked
  • - Indicator,distortion
  • - Tractor,full tracked,armored dozer-scraper combination
  • - Tractor,full tracked,armored dozer-scraper combination
  • - Tractor,full tracked,armored dozer-scraper combination
  • - Indicator,azimuth-elevation-range
  • - Generator,signal
  • - Engine,gasoline
  • - Engine,gasoline
  • - Generator set,gasoline engine,trailer mounted
  • - Receiver-transmitter,radio
  • - Antenna group
  • - Meter,noise level
  • - Multiplexer
  • - Terminal,telegraph
  • - Engine with contain
  • - Modem,radio teletyp
  • - Multiplexer
  • - Multiplexer
  • - Multiplexer
  • - Receiver-transmitter,radio
  • - Air conditioner
  • - Air conditioner
  • - Generator set,diesel engine
  • - Power supply
  • - Test set,transponder set
  • - Compressor unit,rotary
  • - Engine,gasoline
  • - Engine,gasoline
  • - Generator,sweep
  • - Compressor unit,rotary
  • - Air conditioner
  • - Compressor unit,rotary
  • - Distribution box
  • - Power supply
  • - Test set,sound reco
  • - Shelter,nonexpandable
  • - Modem radio
  • - Test stand,aircraft generator
  • - Motor-generator
  • - Truck,fire fighting
  • - Generator set,diesel engine
  • - Generator set,diesel engine
  • - Truck tractor
  • - Truck tractor
  • - Cleaner,steam,pressure jet,trailer mounted
  • - Generator,signal
  • - Buffer,high speed
  • - Central office,telephone,manual
  • - Multiplexer
  • - Motor-generator
  • - Truck,tank
  • - Bottle cleaning-cha
  • - Simulator,radar signal
  • - Engine and containe
  • - Telephone system
  • - Motor-generator
  • - Generator set,diesel engine
  • - Generator set,diesel engine
  • - Radar surveillance
  • - Central,communications
  • - Howitzer,medium,self-propelled
  • - Howitzer,medium,self-propelled
  • - Howitzer,medium,self-propelled
  • - Teletypewriter oper
  • - Generator set,diesel engine
  • - Air conditioner
  • - Test stand,hydraulic system components
  • - Truck,fire fighting
  • - Entrance,protective,pressurized
  • - Recharging unit,coolant,guided missile
  • - Truck,lift,fork
  • - Truck,lift,fork
  • - Truck,lift,fork
  • - Imagery interpretat
  • - Crane,truck mounted
  • - Crane,truck mounted
  • - Flight coordination
  • - Shelter,nonexpandable
  • - Motor-generator
  • - Test set,modem
  • - Terminal,communicat
  • - Installation kit,cbr protection equipment
  • - Air conditioner
  • - Installation kit,cbr protection equipment
  • - Power supply
  • - Fr,sig con hnf 81-2
  • - Test station,electr
  • - Repair facility,ele
  • - Repair facility,ele
  • - Circuit breaker
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Analyzer,spectrum
  • - Condenser,refrigeration
  • - Maintenance facilit
  • - Voice terminal
  • - Antenna-transceiver
  • - Cover and tachomete
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Communication set,s
  • - Data processing sys
  • - Air conditioner
  • - Air conditioner
  • - Pumping assembly,flammable liquid,bulk transfer
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Test facility elect
  • - Radio teletypewriter set
  • - Carrier,cargo
  • - Radio teletypewriter set
  • - Test set,electronic systems
  • - Terminal,telephone
  • - Terminal,telephone
  • - Air conditioner
  • - Shelter,nonexpandable
  • - Central,satellite c
  • - Carrier,air-antitank defense missile system
  • - Carrier,air-antitank defense missile system
  • - Carrier,air-antitank defense missile system
  • - Carrier,air-antitank defense missile system
  • - Radio terminal set
  • - Multimeter
  • - Plate process section,topographic reproduction set,semitrailer mounted
  • - Plate process section,topographic reproduction set,semitrailer mounted
  • - Plate process section,topographic reproduction set,semitrailer mounted
  • - Plate process section,topographic reproduction set,semitrailer mounted
  • - Press section,topographic reproduction set,semitrailer mounted
  • - Press section,topographic reproduction set,semitrailer mounted
  • - Rectifier i section
  • - Finishing section,t
  • - Finishing section,t
  • - Finishing section,t
  • - Printing plant,special warfare,transportable
  • - Test set,electrical power
  • - Truck,utility
  • - Truck,utility
  • - Truck,utility
  • - Carrier,ammunition,tracked
  • - Carrier,ammunition,tracked
  • - Carrier,ammunition,tracked
  • - Truck,ambulance
  • - Air conditioner
  • - Test stand,receiver
  • - Teletype printer
  • - Oscilloscope
  • - Radio teletypewriter set
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Console,communication control
  • - Truck tractor
  • - Test set,digital ca
  • - Air conditioner
  • - Shelter,nonexpandable
  • - Shelter,nonexpandable
  • - Shelter,nonexpandable
  • - Truck,aircraft cargo loading-unloading
  • - Truck,utility
  • - Truck,utility
  • - Monitor,frequency
  • - Air conditioner
  • - Carrier,cargo
  • - Air conditioner
  • - Air conditioner
  • - Truck,fire fighting
  • - Bath unit,portable
  • - Pumping assembly,flammable liquid,bulk transfer
  • - Generator set,diesel engine
  • - Kg-84a
  • - Truck,utility
  • - Truck,utility
  • - Truck,utility
  • - Truck,utility
  • - Truck,utility
  • - Truck,utility
  • - Truck,ambulance
  • - Antenna
  • - Antenna
  • - Remote ground termi
  • - Fairlead,roller and sheave
  • - Satellite communica
  • - Mast,quick erect,ex
  • - Data processing sys
  • - Data processing sys
  • - Data processing sys
  • - Data processing sys
  • - Data processing sys
  • - Data processing sys
  • - Data processing sys
  • - Data processing sys
  • - Data processing sys
  • - Generator set,gas turbine engine
  • - Repeater set,radio
  • - Repeater set,radio
  • - Radio terminal set
  • - Radio terminal set
  • - Shelter,nonexpandable
  • - Shelter,nonexpandable
  • - Shelter,nonexpandable
  • - Shelter,nonexpandable
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Camera,copying,lithographic,trailer mounted
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Oscilloscope
  • - Multiplexer-demulti
  • - Indicator,fault locating
  • - Air conditioner
  • - Truck,fire fighting
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Compressor unit,reciprocating
  • - Air conditioner
  • - Test set,transmissi
  • - Housing assembly,go
  • - Distributing system,electrical
  • - Generator set,diesel engine,trailer mounted
  • - Electronic shop,semitrailer mounted
  • - Power unit,gas turbine engine
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Installation kit,electronic equipment
  • - Pumping assembly,flammable liquid,bulk transfer
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Test set,electrical power
  • - Power supply
  • - Control,motor-generator
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Engine,w container
  • - Pumping assembly,flammable liquid,bulk transfer
  • - Engine,w container
  • - Air conditioner
  • - Heater,duct type,portable
  • - Heater,duct type,portable
  • - Heater,duct type,portable
  • - Heater,duct type,portable
  • - Analyzer,spectrum
  • - Pumping assembly,flammable liquid,bulk transfer
  • - Power panel dist
  • - Governor,diesel engine
  • - Mobile audio-visual
  • - Generator set,diesel engine
  • - Generator set,diesel engine
  • - Generator set,diesel engine
  • - Generator set,diesel engine
  • - Generator set,diesel engine
  • - Engine,gasoline
  • - Generator set,diesel engine,trailer mounted
  • - Air conditioner
  • - Drive unit,hydraulic
  • - Shelter,nonexpandable
  • - Air conditioner
  • - Rack,electrical equipment
  • - Communication system
  • - Communication system
  • - Converter group,signal data
  • - Converter group,signal data
  • - Converter group,signal data
  • - Amplifier,electronic control
  • - Crane,truck mounted
  • - Engine,diesel
  • - Topographic support set
  • - Topographic support set
  • - Truck,lift,fork
  • - Truck,lift,fork
  • - Semitrailer,tank transporter
  • - Semitrailer,tank transporter
  • - Voltmeter,digital
  • - Power plant,electric,trailer mounted
  • - Counter,electronic,digital readout
  • - Converter,telegraph-telephone signal
  • - Shelter,nonexpandable
  • - Shelter,nonexpandable
  • - Engine and contain
  • - Amplifier,radio frequency
  • - Reel system,hose
  • - Reel system,hose
  • - Reel system,hose
  • - Reel system,hose
  • - Test set,radio
  • - Truck,aircraft cargo loading-unloading
  • - Charger,battery
  • - Oscilloscope
  • - Governor,diesel engine
  • - Power supply
  • - Generator set,diesel engine
  • - Analyzer,digital data,electronic test
  • - Recovery vehicle,full tracked
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Recovery vehicle,full tracked
  • - Electronic shop,transportable
  • - Engine with contain
  • - Telephone set
  • - Test bench,radar set
  • - Interconnecting group
  • - Rack,electrical equipment
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Test set,radio
  • - Air conditioner
  • - Air conditioner
  • - Relay,electromagnetic
  • - Truck,utility
  • - Engine and containe
  • - Carrier,ammunition,tracked
  • - Carrier,ammunition,tracked
  • - Carrier,ammunition,tracked
  • - Air conditioner
  • - Air conditioner
  • - Carrier,ammunition,tracked
  • - Carrier,ammunition,tracked
  • - Carrier,ammunition,tracked
  • - Carrier,ammunition,tracked
  • - Carrier,ammunition,tracked
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Carrier,cargo
  • - Truck,utility
  • - Truck,utility
  • - Truck,utility
  • - Truck,utility
  • - Truck,utility
  • - Truck,utility
  • - Truck,utility
  • - Truck,ambulance
  • - Truck,utility
  • - Truck,utility
  • - Truck,ambulance
  • - Truck,ambulance
  • - Air conditioner
  • - Rack,electrical equipment
  • - Truck,lift,fork
  • - Generator set,diesel engine,trailer mounted
  • - Generator set,diesel engine,trailer mounted
  • - Data analysis central
  • - Truck,ambulance
  • - Truck,utility
  • - Truck,ambulance
  • - Truck,utility
  • - Compressor unit,rotary
  • - Compressor unit,rotary
  • - Control panel,test
  • - Repeater set,radio
  • - Repeater set,radio
  • - Shelter,nonexpandable
  • - Shelter,nonexpandable
  • - Shelter,nonexpandable
  • - Radio terminal set
  • - Compressor unit,rotary
  • - Power unit,gas turbine engine
  • - Control,communication system
  • - Door,access,weapon system
  • - Alarm-monitor
  • - Carrier,personnel,full tracked
  • - Seat,aircraft
  • - Pumping assembly,flammable liquid,bulk transfer
  • - Table,electrical test and maintenance
  • - Installation kit,electronic equipment
  • - Satellite communication control central
  • - Circuit card assembly
  • - Circuit card assembly
  • - Remote kit unit
  • - Filter-separator,liquid fuel
  • - Pumping unit,centrifugal,fueling-defueling
  • - Power supply
  • - Repeater set,radio
  • - Antenna assembly
  • - Repeater set,radio
  • - Radio terminal set
  • - Radio terminal set
  • - Shelter,nonexpandable
  • - Shelter,nonexpandable
  • - Test set,automatic pilot
  • - Engine,diesel
  • - Door,access,weapon system
  • - Power plant,electric,trailer mounted
  • - Control,alarm
  • - Heater,space
  • - Heater,space
  • - Engine,diesel
  • - Truck,utility
  • - Truck,utility
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Table,electrical test and maintenance
  • - Test bench,radar set

Availability for MS27183-42 A member of our team will provide you with a price and availability quote

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Shipping Information

Special Handling
Other or no special handling required (sh) 
LTL (less than a truck load rating)
50.0 
LCL (less than a car load rating)
Unknown
Special Cargo
No special type of cargo code applicable 
Air Freight (Minimum cargo door size required)
Shipment is not a consolidation and does not exceed 84 inches in any dimension. 
Customs Requirement Classification
Construction materials: includes paint and related materials, prefabricated building, wood products, metal and composition mater 
Commodity (for shipments via water)
Metal hardware 
NMFC (national motor freight code)
194160 WASHER OR GASKETS, IRON OR STEEL, 
UFC (universal freight code)
55210 

Similar by Design Other washers with similar characteristics

Nothing similar to this part number was found in our inventory

MS27183-42 / Washer,flatWhat is the formal definition of this item?

A washer having a centrally located hole with a solid or laminated cross-section and two flat parallel bearing surfaces. the hole must be 75 percent or less than the largest dimension and the bearing surface finish is greater than 32 microinch (0.8 micrometer). the thickness cannot exceed 25 percent of the largest outside dimension. when the largest outside dimension is less than 1/4 inch or 6mm, the thickness must be 0.006 inches (0.15mm) or greater and for items 1/4 inch (6mm) or larger, the thickness must be 0.016 inches (0.4mm) or greater. the maximum tolerance is applied to dimensions and used as a determining factor. items with separable lamination use shim. for items fabricated from ceramic or electrically rated materials by specification or industry standards use insulator (1), washer. excludes disk, valve, graphite impregnated and lubricated items.