ST4M178A4

ST4M178A4 Spring Tension Washer

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Datasheet. ST4M178A4 specification

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

2.400in. ⁓2-13/32"

Outside Diameter
The length of a straight line which passes through the center of a circular figure or body,and terminates at the outside circumference.

2.860in.

Overall Height
The distance measured in a straight line from the bottom to the top of an item.

0.307in.

Material Thickness
A measurement of the smallest dimension of the material,in distinction from length or width.

0.025in.

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.

one tab, 0.200 in. w, on each side of center hole

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

copper alloy 172

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.

QQ-C-533, temper at fed spec 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.

tin

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.

MIL-T-10727 mil spec single treatment response

Style Designator
The style designation indicating the configuration that most nearly corresponds to the appearance of the item.

spring tension

Answers.

What is the style?

Spring tension

What material is the spring tension washer made of ?

Copper alloy 172

What is the thickness?

0.025 inches

What is the outside diameter?

2.860 inches

What is the inside hole diameter?

2.400 inches

What is the NSN for ST4M178A4?

5310-01-030-4920

How is this classified for shipping?

Schedule B number: 7415210000
nmfc 194120
Copper washers including spring washers not threaded

What's the federal classification of ST4M178A4?

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 5310-01-030-4920 WASHER,SPRING TENSION

spring tension tin surface treated one tab, 0.200 in. w, on each side of center hole 0.025" material thickness 2.860" outside diameter 2.400" hole diameter

NIIN
010304920
NIIN Date
11/07/76
Schedule B
7415210000 
Name Code
15938
FIIG
A022B0
Item Weight
0.100lbs
Item Dimensions
--
QUP
 
Historical Price
$47.73 EA
DEMIL / ITAR
Uncontrolled item (Code A)
Hazmat
No hazard information available from HMIRS.
MSDS
N/A
Precious Metals
Metal content unknown
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. ST4M178 REV D Cage 76301

Major End Users Countries and entities

  • - Department of The Air Force 
  • - Department of The Navy 
  • - Republic of Korea 

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Shipping Information

Special Handling
Other or no special handling required (sh) 
LTL (less than a truck load rating)
Rating variable 
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)
194120 WASHERS/GASKETS/PCKG DVCS NOI 
UFC (universal freight code)
95100 

Similar by Design Other washers with similar characteristics

Nothing similar to this part number was found in our inventory

ST4M178A4 / Washer,spring tensionWhat is the formal definition of this item?

A bent spring metal washer with a centrally located hole. it is designed to exert pressure axially when assembled in place.