H31-10BAC

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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-025-6991

Item Name Code

05277

Assigment Date

08/08/1976 (50 years ago)

A nut having a flat bottom and 6 sides. An integral feature is incorporated for locking on the threads of a mating member. Excludes:nut (1), self-locking, cap.

3b thread class, 0.407 inches maximum nut height, hexagon nut style, prevailing torque all metal design locking feature, right-hand thread direction

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
Nut Style: hexagon
Nut Height: 0.407 inches maximum
Width Across Flats: 0.928 inches minimum and 0.940 inches maximum
Temp Rating: 900.0 fahrenheit nominal
Thread Series: unjf
Thread Quantity Per Inch: 18
Nominal Thread Size: 0.625 inches
Countersink Angle: 120.0 degrees nominal nut
Bearing Surface Type: chamfered or washer faced
Material: iron alloy 660 overall
Material Document And Classification: ams5525 assn std single material response or ams5737 assn std single material response overall
Precious Material: silver
Surface Treatment: silver overall
Surface Treatment Document And Classification: ams 2410 assn std single treatment response overall
Specification/Standard Data: 81205-bacn10jc manufacturers standard

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
101LH9074-10	Hexagon Self-Locking Nut
BACN10JC10C	Hexagon Self-Locking Nut
BMN4122C15-10	Hexagon Self-Locking Nut
H31-10BAC	Hexagon Self-Locking Nut

FAQs

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

What is the FSCG of the NSN 5310-01-025-6991?

The FSCG of the NSN 5310-01-025-6991 is 5310

Does the NSN 5310-01-025-6991 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-01-025-6991 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 5310-01-025-6991 contain precious materials?

Item contains silver.

Does NSN 5310-01-025-6991 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 5310-01-025-6991 was assigned to the Federal Catalog?

It was assigned 50 years ago, on Sun, Aug 8, 1976