A157-5

View detailed technical data, stock status, and sourcing information for: A157-5
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-139-4171

Item Name Code

15886

Assigment Date

10/01/1982 (43 years ago)

right-hand thread direction, 0.688 inches nominal nut diameter, unf thread series, 0.250 inches nominal nut thickness, knurled nut style

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
Nut Style: knurled
Nut Diameter: 0.688 inches nominal
Nut Thickness: 0.250 inches nominal
Thread Series: unf
Thread Quantity Per Inch: 20
Nominal Thread Size: 0.500 inches
Countersink Angle: 90.0 degrees nominal overall
Special Features: chamfer ends 0.031 in. by 45 degreees
Material: steel 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
A157-5	Knurled Plain Nut

FAQs

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

What is the FSCG of the NSN 5310-01-139-4171?

The FSCG of the NSN 5310-01-139-4171 is 5310

Does the NSN 5310-01-139-4171 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-01-139-4171 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 5310-01-139-4171 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-01-139-4171 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 5310-01-139-4171 was assigned to the Federal Catalog?

It was assigned 43 years ago, on Fri, Oct 1, 1982