HW51131-4

View detailed technical data, stock status, and sourcing information for: HW51131-4
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-260-9380

Item Name Code

29730

Assigment Date

08/07/1987 (39 years ago)

A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery. An integral feature is incorporated for locking on the threads of a mating member.

right-hand thread direction, 3b thread class, 0.460 inches nominal washer outside diameter, prevailing torque all metal design locking feature, 0.282 inches nominal overall height

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
Washer Outside Diameter: 0.460 inches nominal
Overall Height: 0.282 inches nominal
Nut Style: hexagon
Width Across Flats: 0.274 inches minimum and 0.284 inches maximum
Temp Rating: 900.0 fahrenheit maximum
Thread Series: unjf
Thread Quantity Per Inch: 28
Nominal Thread Size: 0.250 inches
Special Features: non-magnetic
Material: iron alloy 660 overall
Precious Material: silver
Surface Treatment: passivate washer
Surface Treatment: silver nut

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
HW51131-4	Extended Washer Self-Locking Nut

FAQs

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

What is the FSCG of the NSN 5310-01-260-9380?

The FSCG of the NSN 5310-01-260-9380 is 5310

Does the NSN 5310-01-260-9380 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-01-260-9380 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 5310-01-260-9380 contain precious materials?

Item contains silver.

Does NSN 5310-01-260-9380 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 5310-01-260-9380 was assigned to the Federal Catalog?

It was assigned 39 years ago, on Fri, Aug 7, 1987