1634-256-A-7

View detailed technical data, stock status, and sourcing information for: 1634-256-A-7
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-116-8971

Item Name Code

15887

Assigment Date

08/05/1981 (45 years ago)

round nut style, 2b thread class, right-hand thread direction, 0.172 inches minimum and 0.203 inches maximum nut diameter, 0.297 inches minimum and 0.328 inches maximum nut thickness

Product Characteristics

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

Thread Class: 2b
Thread Direction: right-hand
Nut Style: round
Nut Diameter: 0.172 inches minimum and 0.203 inches maximum
Nut Thickness: 0.297 inches minimum and 0.328 inches maximum
Thread Series: unc
Thread Quantity Per Inch: 56
Nominal Thread Size: 0.086 inches
Material: aluminum alloy 6061 or aluminum alloy 2011 overall
Material Document And Classification: qq-a-225/8 t6 fed spec 1st material response or qq-a-225/3 t3 fed spec 2nd material response overall
Surface Treatment: chromate overall
Surface Treatment Document And Classification: mil-c-5541 mil spec single treatment 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
1634-256-A-7	Round Plain Nut
8078-A-0256	Round Plain Nut
8078-A-0256-16	Round Plain Nut
8078-A-0256-1B	Round Plain Nut

FAQs

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

What is the FSCG of the NSN 5310-01-116-8971?

The FSCG of the NSN 5310-01-116-8971 is 5310

Does the NSN 5310-01-116-8971 have a Schedule B code assigned?

Yes, the Schedule B code is 7616995195

Does NSN 5310-01-116-8971 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 5310-01-116-8971 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-01-116-8971 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 5310-01-116-8971 was assigned to the Federal Catalog?

It was assigned 45 years ago, on Wed, Aug 5, 1981