S231NA38MMRC5568JMCE1

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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-381-1202

Item Name Code

18257

Assigment Date

10/08/1993 (32 years ago)

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.

hexagon head style, 5.10 millimeters minimum and 5.50 millimeters maximum head height, 25.0 millimeters nominal fastener length, right-hand thread direction, 22.5 millimeters nominal thread length

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Thread Direction: right-hand
Thread Length: 22.5 millimeters nominal
Fastener Length: 25.0 millimeters nominal
Head Style: hexagon
Head Height: 5.10 millimeters minimum and 5.50 millimeters maximum
Width Between Flats: 12.57 millimeters minimum and 13.00 millimeters maximum
End Item Identification: medium mine protected vehicle - mmpv
Nominal Thread Diameter: 8.0 millimeters
Thread Pitch In Millimeters: 1.25
External Thread Tolerance Class: 6g
Material: steel property class 10.9 overall
Surface Treatment: zinc and chromate overall
Surface Treatment Document And Classification: qq-z-325 ty2 cl3 fed spec single treatment response overall
Thread Series Designator: m

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
12485434-093	Hexagon Head Cap Screw
12569623-51	Hexagon Head Cap Screw
AES07M08B025CG7A81	Hexagon Head Cap Screw
B18231B08025N	Hexagon Head Cap Screw
S231NA38MMRC5568JMCE1	Hexagon Head Cap Screw

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 5305-01-381-1202?

The FSCG of the NSN 5305-01-381-1202 is 5305

Does the NSN 5305-01-381-1202 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-381-1202 require demilitarization?

Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 5305-01-381-1202 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-381-1202 contain hazardous materials?

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

When the NSN 5305-01-381-1202 was assigned to the Federal Catalog?

It was assigned 32 years ago, on Fri, Oct 8, 1993