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Datasheet. 2156639-8 specification
The style designation indicating the configuration that most nearly corresponds to the cross-sectional shape of the item.
rectangular
The length of a straight line which passes through the center of a hole,and terminates at the circumference.
0.170in. ⁓11/64"
The style designation indicating the configuration that most nearly corresponds to the peripheral shape of the item.
round
The style designation indicating the configuration that most nearly corresponds to the shape of the center hole.
1 round
A measurement of the smallest dimension of an item,in distinction from length or width.
0.141in. ⁓9/64"
A measurement of the longest straight line across a circular cross-sectional plane.
2.500in. ⁓2-1/2"
The chemical compound or mechanical mixture properties of which the item is fabricated.
copper alloy
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.
nickel
Answers.
Copper alloy
0.170 inches
Schedule B number: 7415210000
Copper washers including spring washers not threaded
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 5310-00-968-3353 WASHER,FLAT
nickel surface treated 0.170" hole diameter
- NIIN
- 009683353
- NIIN Date
- 01/01/62
- Schedule B
- 7415210000
- Name Code
- 13393
- FIIG
- A022B0
- 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
Major End Users Countries and entities
- - Canada
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2156639-8 / 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.
