803-1385789 PIECE 7

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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-366-3556

Item Name Code

29730

Assigment Date

10/24/1992 (33 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 nut style, prevailing torque all metal design locking feature, right-hand thread direction, 0.625 inches nominal overall height, 3b 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: 3b
Thread Direction: right-hand
Locking Feature: prevailing torque all metal design
Overall Height: 0.625 inches nominal
Nut Style: hexagon
Washer Thickness: 0.500 inches nominal
Width Across Flats: 1.250 inches nominal
Thread Series: un
Thread Quantity Per Inch: 12
Nominal Thread Size: 1.750 inches
Material: aluminum alloy 5052 overall
Material Document And Classification: astm b221 assn std single material response overall

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
1385789 PIECE 7	Extended Washer Self-Locking Nut
5310PL1283795	Extended Washer Self-Locking Nut
803-1385789 PIECE 7	Extended Washer Self-Locking Nut

FAQs

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

What is the FSCG of the NSN 5310-01-366-3556?

The FSCG of the NSN 5310-01-366-3556 is 5310

Does the NSN 5310-01-366-3556 have a Schedule B code assigned?

Yes, the Schedule B code is 7616995195

Does NSN 5310-01-366-3556 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 5310-01-366-3556 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-01-366-3556 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 5310-01-366-3556 was assigned to the Federal Catalog?

It was assigned 33 years ago, on Sat, Oct 24, 1992