20000532028-003

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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5340 Commercial Hardware

National Stock Number

5340-01-412-9778

Item Name Code

40280

Assigment Date

05/03/1995 (31 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.

1.370 inches nominal right external thread length, right-hand right external thread direction, 0.850 inches nominal length, 0.500 inches nominal end radius, 3a right external thread class

Product Characteristics

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

Thread Class: 3a right external
Thread Direction: right-hand right external
Thread Length: 1.370 inches nominal right external
End Radius: 0.500 inches nominal
Length: 0.850 inches nominal
Cross-Sectional Length: 0.625 inches nominal
Cross-Sectional Width: 0.312 inches nominal
Cross-Sectional Shape: rectangular
Thread Quantity Per Inch: 24 right external
Nominal Thread Size: 0.312 inches right external
Right Projection Diameter: 0.312 inches nominal
Right Projection Length: 1.370 inches nominal
Material: steel comp 4130 overall
Material Document And Classification: mil-s-6758 cond f4 mil spec single material response overall
Style Designator: projection one end right external threads
Thread Series Designator: unf right external

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
20000532028-003	Spacing Threaded Standoff

FAQs

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

What is the FSCG of the NSN 5340-01-412-9778?

The FSCG of the NSN 5340-01-412-9778 is 5340

Does NSN 5340-01-412-9778 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 5340-01-412-9778 contain precious materials?

Item does not contain precious metal.

Does NSN 5340-01-412-9778 contain hazardous materials?

Indicates there is no information in the hmirs. The nsn is in a fsc in table ii of fed std 313 and a msds may be required by the user. The requirement for a msds is dependent on a hazard determination of the supplier or the intended end use of item.

When the NSN 5340-01-412-9778 was assigned to the Federal Catalog?

It was assigned 31 years ago, on Wed, May 3, 1995