5305-01-445-8158

Find complete technical information, availability, and procurement data for: 5305-01-445-8158
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-445-8158

Item Name Code

18257

Assigment Date

06/13/1997 (29 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.

1.000 inches nominal thread length, 1.250 inches nominal fastener length, right-hand thread direction, 2a thread class, hexagon head style

Product Characteristics

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

Thread Class: 2a
Thread Direction: right-hand
Thread Length: 1.000 inches nominal
Fastener Length: 1.250 inches nominal
Head Style: hexagon
Head Height: 0.226 inches minimum and 0.268 inches maximum
Width Between Flats: 0.551 inches minimum and 0.562 inches maximum
Nominal Thread Diameter: 0.375 inches
Thread Quantity Per Inch: 16
Minimum Tensile Strength: 130000 pounds per square inch
Hardness Rating: 24.0 rockwell c minimum overall
Minimum Yield Strength: 90000 pounds per square inch
Material: nickel alloy k-500 overall
Material Document And Classification: qq-n-286 fed spec single material response overall
Thread Series Designator: unc

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
211067339	Hexagon Head Cap Screw
566-6404315-24	Hexagon Head Cap Screw
640315-24	Hexagon Head Cap Screw
DF2018-64-24	Hexagon Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-01-445-8158?

The FSCG of the NSN 5305-01-445-8158 is 5305

Does the NSN 5305-01-445-8158 have a Schedule B code assigned?

Yes, the Schedule B code is 7508900000

Does NSN 5305-01-445-8158 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 5305-01-445-8158 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-445-8158 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 5305-01-445-8158 was assigned to the Federal Catalog?

It was assigned 29 years ago, on Fri, Jun 13, 1997