4B5271

4B5271 Flat Washer
Home » Catalog » Nuts & Washers (p. 2362) » Flat Washers (p. 736) » Part Number 4B5271

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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. 4B5271 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.

0.433in. and 0.453in. ⁓29/64"

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.

0.064in. and 0.104in. ⁓7/64"

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

0.993in. and 1.030in. ⁓1-1/32"

End Item Identification
The national stock number or the identification information of the end equipment for which the item is a part.

mrap buffalo MK2A2; mrap - M-Atv DV178; mrap - M-Atv

Criticality Code Justification
The master requirement codes of those requirements which are technically critical by reason of tolerance,fit,performance,or other characteristics which affect identification of the item.

feat

Special Features
Those unusual or unique characteristics or qualities of an item not covered in the other requirements and which are determined to be essential for identification.

weapon system essential

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.

When was the most recent contract awarded?

On 08/24/2010 under contract SPM5A810M2479 for qty 2,620

What quantity is this sold in?

1HD

What material is the flat washer made of ?

Steel

What is the inside hole diameter?

0.433 inches minimum and 0.453 inches maximum

What is the NSN for 4B5271?

5310-00-809-4061

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 4B5271?

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 5310-00-809-4061 WASHER,FLAT

Used on mrap buffalo mk2a2; mrap - m-atv dv178; mrap - m-atv. cadmium surface treated weapon system essential 0.433" hole diameter

NIIN
008094061
NIIN Date
01/01/62
Schedule B
7318220000 
Name Code
13393
FIIG
A022B0
Item Weight
0.400lbs
Item Dimensions
--
QUP
1 
Historical Price
$7.68 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. A22506-7 Cage D9182
2. AN945-6 Cage D9182
3. MS15795-15 Cage D9182
4. 120389 Cage 80195
5. MS27183-15 Cage 96906
6. FF-W-92 Cage 81348
7. 492346 Cage 7X677
8. 38180 Cage 96046
9. 12387279-15 Cage 19207
10. 110380A Cage 45152
11. 13207E7100FN466 Cage 97403
12. 7HR818 Cage 45152
13. 5310-300 Cage 61796
14. 106263 Cage D9182
15. 309346 Cage H0001
16. 0309346 Cage H0001
17. 0717580 Cage S3002
18. 4197515-022 Cage 05869
19. 15015 Cage K8693
20. 331967 Cage 11862
21. 492346 Cage 11862
22. MS15795-115 Cage 96906
23. 10082607 Cage A486G
24. CSA46410 Cage 82254
25. 5310PL0352231 Cage 9009H
26. 5310008094061 Cage SCY13
27. S018003 Cage 03677
28. 110380A Cage 75Q65
29. MS27183-15 Cage A9271

Major End Users Countries and entities

  • - National Aeronautics And Space Administration 
  • - National Aeronautics And Space Administration 
  • - Bonneville Power Administration 
  • - Department of The Navy 
  • - Department of The Army 
  • - Department of The Air Force 
  • - U.s. Marine Corps 
  • - U.s. Coast Guard 
  • - Austria 
  • - Croatia 
  • - Finland 
  • - Lithuania 
  • - Slovenia 
  • - Poland 
  • - Brazil 
  • - Spain 
  • - Singapore 
  • - Kuwait 
  • - Morocco 
  • - Saudi Arabia 
  • - Malaysia 
  • - Thailand 
  • - 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

  • - Air conditioner, f18-mpi
  • - Direct air support central, an/uyq-3a (v) 2
  • - Support equipment, b-1 aircraft
  • - Communications terminal, satellite an/gsc-39(v)1
  • - Fire pumps
  • - Shipboard material handling equipment (mhe)
  • - Aircraft, sof ( ac-130h, mc-130h, ec-130e, hc-130)
  • - 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
  • - Compressor unit,reciprocating
  • - Absorber,aircraft arresting barrier
  • - Truck tractor
  • - Water distribution equipment
  • - Power plant,electric,trailer mounted
  • - Laundry unit,trailer mounted
  • - Reflector,antenna
  • - Laundry unit,trailer mounted
  • - Laundry unit,trailer mounted
  • - Laundry unit,trailer mounted
  • - Engine and containe
  • - Truck,utility
  • - Printing plant,special warfare,transportable
  • - Compressor unit,reciprocating
  • - Truck,tank
  • - Engine,diesel
  • - Carrier,cargo
  • - Air conditioner
  • - Compressor unit,rotary
  • - Teletypewriter
  • - Panel,interface device
  • - Truck,utility
  • - Tractor,full tracked,low speed
  • - Shipping and storage container,guided missile
  • - Buffer,high speed
  • - Compressor unit,reciprocating
  • - Tank,storage,liquid argon-nitrogen-oxygen
  • - Generator set,gasoline engine,trailer mounted
  • - Generator set,diesel engine,trailer mounted
  • - Tractor,full tracked,armored dozer-scraper combination
  • - Engine and containe
  • - Compressor unit,reciprocating
  • - Compressor unit,reciprocating
  • - Air conditioner
  • - Terminal,telegraph
  • - Truck,utility
  • - Laundry unit,trailer mounted
  • - Truck,aircraft cargo loading-unloading
  • - Recorder-reproducer set,signal data
  • - Power supply subassembly
  • - Truck,fire fighting
  • - Laundry unit,trailer mounted
  • - Multiplexer
  • - Test stand,aircraft generator
  • - Truck,fire fighting
  • - Engine with contain
  • - Distributor,water,tank type
  • - Truck,utility
  • - Truck,fire fighting
  • - Carrier,ammunition,tracked
  • - Truck,utility
  • - Carrier,ammunition,tracked
  • - Truck,utility
  • - Power plant,electric
  • - Laundry unit,trailer mounted
  • - Truck,tank
  • - Water storage and d
  • - Compressor unit,reciprocating
  • - Carrier,ammunition,tracked
  • - Engine,w container
  • - Truck,fire fighting
  • - Engine,diesel
  • - Tractor,full tracked,armored dozer-scraper combination
  • - Tractor,full tracked,armored dozer-scraper combination
  • - Tractor,full tracked,armored dozer-scraper combination
  • - Laundry unit,trailer mounted
  • - Engine,diesel
  • - Trailer,cargo
  • - Multiplexer set
  • - Recovery vehicle,full tracked
  • - Carrier,ammunition,tracked
  • - Recovery vehicle,full tracked
  • - Rifle,recoilless,90 millimeter
  • - Sweeper,rotary,towed
  • - Satellite communica
  • - Pump unit,centrifugal
  • - Tent
  • - Recovery vehicle,full tracked
  • - Truck,utility
  • - Recovery vehicle,full tracked
  • - Laundry unit,trailer mounted
  • - Recovery vehicle,full tracked
  • - Recovery vehicle,full tracked
  • - Printer,projection,photographic
  • - Shelter,nonexpandable
  • - Truck,lift,fork
  • - Switchboard,telephone,manual
  • - Distribution box
  • - Engine and contain
  • - Truck,utility
  • - Wind measuring set
  • - Recovery vehicle,full tracked
  • - Heater,duct type,portable
  • - Tractor,wheeled,warehouse
  • - Carrier,ammunition,tracked
  • - Carrier,ammunition,tracked
  • - Generator set,gasoline engine,trailer mounted
  • - Carrier,ammunition,tracked
  • - Semitrailer,tank transporter
  • - Tip,aircraft
  • - Distributor,water,tank type
  • - Generator set,diesel engine
  • - Truck,lift,fork
  • - Semitrailer,tank transporter
  • - Tip,aircraft
  • - Truck,lift,fork
  • - Computer set
  • - Engine and containe
  • - Truck,utility
  • - Truck,lift,fork
  • - Truck,aircraft cargo loading-unloading
  • - Terminal,lug
  • - Water purification unit,skid mounted
  • - Door,access,aircraft
  • - Telephone set
  • - Power supply
  • - Generator set,diesel engine
  • - Tractor,wheeled,warehouse
  • - Communications term
  • - Heater,duct type,portable
  • - Power supply
  • - Net control station
  • - Power supply
  • - Latch arm assembly
  • - Heater,bitumen
  • - Simulator,radar target
  • - Combat engineer vehicle,full tracked
  • - Combat engineer vehicle,full tracked
  • - Combat engineer vehicle,full tracked
  • - Combat engineer vehicle,full tracked
  • - Distributor,water,tank type
  • - Teletypewriter
  • - Generator set,diesel engine
  • - Power supply
  • - Test stand,aircraft generator
  • - Combat engineer vehicle,full tracked
  • - Truck,ambulance
  • - Combat engineer vehicle,full tracked
  • - Combat engineer vehicle,full tracked
  • - Indicator,azimuth-elevation-range
  • - Combat engineer vehicle,full tracked
  • - Combat engineer vehicle,full tracked
  • - Air conditioner
  • - Combat engineer vehicle,full tracked
  • - Combat engineer vehicle,full tracked
  • - Combat engineer vehicle,full tracked
  • - Combat engineer vehicle,full tracked
  • - Air conditioner
  • - Semitrailer,van
  • - Engine with contain
  • - Combat engineer vehicle,full tracked
  • - Combat engineer vehicle,full tracked
  • - Combat engineer vehicle,full tracked
  • - Truck,utility
  • - Truck,utility
  • - Combat engineer vehicle,full tracked
  • - Combat engineer vehicle,full tracked
  • - Combat engineer vehicle,full tracked
  • - Semitrailer,tank
  • - Truck,utility
  • - Antenna group
  • - Reeling machine,cable,motor driven
  • - Power supply
  • - Semitrailer,tank
  • - Power supply
  • - Combat engineer vehicle,full tracked
  • - Truck,lift,fork
  • - Truck,lift,fork
  • - Radar set subassembly
  • - Truck,lift,fork
  • - Semitrailer,tank
  • - Truck,lift,fork
  • - Truck,lift,fork
  • - Truck,utility
  • - Truck,lift,fork
  • - Truck,lift,fork
  • - Distributor,bituminous material,tank type
  • - Truck,ambulance
  • - Compressor unit,reciprocating
  • - Truck,lift,fork
  • - Truck,utility
  • - Truck,ambulance
  • - Power plant,electric,semitrailer mounted
  • - Distributor,bituminous material,tank type
  • - Meteorological station,automatic
  • - Distributor,bituminous material,tank type
  • - Operations central
  • - Receiver-transmitter,radio
  • - Crane truck,warehouse
  • - Distributor,bituminous material,tank type
  • - Crane truck,warehouse
  • - Flight coordination
  • - Voice terminal
  • - Amplifier,radio frequency
  • - Distributor,bituminous material,tank type
  • - Test facilities kit
  • - Distributor,bituminous material,tank type
  • - Carrier,air-antitank defense missile system
  • - Crane,truck mounted
  • - Tractor,full tracked,low speed
  • - Multiplexer
  • - Semitrailer,van
  • - Reeling machine,cable,motor driven
  • - Power plant,electric,trailer mounted
  • - Antenna group
  • - Trailer,flat bed
  • - Telephone set
  • - Shelter,nonexpandable
  • - Transmitter control group
  • - Trailer,flat bed
  • - Shelter,nonexpandable,integrated
  • - Antenna
  • - Engine,diesel
  • - Motor-generator
  • - Engine,w container
  • - Mast
  • - Plate process section,topographic reproduction set,semitrailer mounted
  • - Plate process section,topographic reproduction set,semitrailer mounted
  • - Bearing,plain,rod end
  • - Generator set,diesel engine,semitrailer mounted
  • - Truck,ambulance
  • - Antenna-receiver-transmitter group,target tracking,trailer mounted
  • - Pumping unit,hydraulic,power driven
  • - Case,antenna
  • - Plate process section,topographic reproduction set,semitrailer mounted
  • - Water storage and d
  • - Dispenser,mine
  • - Power unit,gas turbine engine
  • - Recovery vehicle,full tracked
  • - Receiver group
  • - Motor-generator
  • - Engine and containe
  • - Truck,utility
  • - Engine,diesel
  • - Finishing section,t
  • - Antenna-transceiver
  • - Mixer,concrete,trailer mounted
  • - Test stand,electric and hydraulic system components
  • - Rectifier i section
  • - Crane,truck mounted
  • - Fixture,guided missile maintenance
  • - Finishing section,t
  • - Crane,truck mounted
  • - Receiver-transmitter,radio
  • - Finishing section,t
  • - Antenna-receiver-transmitter group,acquisition
  • - Distributor,bituminous material,tank type
  • - Carrier,cargo
  • - Air conditioner
  • - Power plant,electric,trailer mounted
  • - Truck,tank
  • - Truck,aircraft cargo loading-unloading
  • - Lead,electrical
  • - Shelter,nonexpandable
  • - Finishing section,t
  • - Converter,telegraph-telephone signal
  • - Master station,posi
  • - Water storage and d
  • - Case,electronic communications equipment
  • - Crane truck,warehouse
  • - Crane,truck mounted
  • - Extender card,electronic test
  • - Truck,utility
  • - Distributor,bituminous material,tank type
  • - Air conditioner
  • - Carrier,ammunition,tracked
  • - Coupler,antenna
  • - Distributor,bituminous material,tank type
  • - Mast group,hydrauli
  • - Illuminator,infrared
  • - Truck,utility
  • - Howitzer,medium,self-propelled
  • - Carrier,cargo
  • - Distributor,bituminous material,tank type
  • - Distributor,bituminous material,tank type
  • - Cradle,boat
  • - Shipping and storage container,engine
  • - Helicopter,cargo-transport
  • - Carrier,ammunition,tracked
  • - Truck,utility
  • - Truck,utility
  • - Terminal,telephone
  • - Truck,ambulance
  • - Air conditioner
  • - Test stand,aircraft generator
  • - Helicopter,cargo-transport
  • - Truck,utility
  • - Air conditioner
  • - Air conditioner
  • - Air conditioner
  • - Truck,utility
  • - Generator set,diesel engine,semitrailer mounted
  • - Distributor,bituminous material,tank type
  • - Bakery plant,trailer mounted
  • - Semitrailer,tank
  • - Truck,ambulance
  • - Reeling machine,cable,motor driven
  • - Satellite communica
  • - Door,access,aircraft
  • - Generator set,diesel engine
  • - Tank,storage,liquid argon-nitrogen-oxygen
  • - Air conditioner
  • - Compressor unit,rotary
  • - Compressor unit,reciprocating
  • - Receiver,radio
  • - Engine with contain
  • - Carrier,ammunition,tracked
  • - Terminal,telephone
  • - Truck,ambulance
  • - Truck,lift,fork
  • - Truck,utility
  • - Terminal,communicat
  • - Truck,utility
  • - Engine with contain
  • - Truck,utility
  • - Power unit,gas turbine engine
  • - Truck,utility
  • - Truck,dump
  • - Generator set,diesel engine
  • - Recovery vehicle,full tracked
  • - Test set,radio
  • - Shipping and storage container,guided missile components
  • - Air conditioner
  • - Semitrailer,tank
  • - Generator set,diesel engine
  • - Truck,utility
  • - Cradle,boat
  • - Compressor unit,rotary
  • - Charger,battery
  • - Compressor unit,rotary
  • - Trailer,guided missile
  • - Pump unit,centrifugal
  • - Seat,aircraft
  • - Heater,duct type,portable
  • - Door,access,aircraft
  • - Terminal,communicat
  • - Air conditioner
  • - Reeling machine,cable,motor driven
  • - Transmission,mechanical
  • - Antenna group
  • - Meteorological station,automatic
  • - Laundry unit,trailer mounted
  • - Carrier,personnel,full tracked
  • - Fan,centrifugal
  • - Shelter
  • - Storage chest,tank
  • - Laundry unit,trailer mounted
  • - Fixture,ammunition maintenance
  • - Truck,fire fighting
  • - Pump unit,centrifugal

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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

4B5271 / 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.