MS21245L8

View detailed technical data, stock status, and sourcing information for: MS21245L8
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-449-2378

Item Name Code

05277

Assigment Date

05/15/1970 (56 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.

right-hand thread direction, 3b thread class, dry film lubricant lubrication, prevailing torque all metal design locking feature, hexagon 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 Class: 3b
Thread Direction: right-hand
Locking Feature: prevailing torque all metal design
Lubrication: dry film lubricant
Nut Style: hexagon
Nut Height: 0.328 inches maximum
Width Across Flats: 0.741 inches minimum and 0.752 inches maximum
Temp Rating: 450.0 fahrenheit nominal
Thread Series: unjf
Thread Quantity Per Inch: 20
Hardness Rating: 46.0 rockwell c maximum
Nominal Thread Size: 0.500 inches
Bearing Surface Type: chamfered or washer faced
Bearing Surface Finish: 125.0 microinches
Material: steel overall
Surface Treatment: cadmium overall
Surface Treatment Document And Classification: qq-p-416,ty 1,cl 3 fed spec single treatment response overall

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5310-00-638-5728	No Name Available	09/24/1996
5310-01-023-2460	No Name Available	05/01/1989

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
10172712	Hexagon Self-Locking Nut
5310004492378	Hexagon Self-Locking Nut
5310PL1016796	Hexagon Self-Locking Nut
LH7644-080	Hexagon Self-Locking Nut
MS21245L8	Hexagon Self-Locking Nut
NASM21245	Hexagon Self-Locking Nut
RMLH7644-080	Hexagon Self-Locking Nut

FAQs

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

What is the FSCG of the NSN 5310-00-449-2378?

The FSCG of the NSN 5310-00-449-2378 is 5310

Does the NSN 5310-00-449-2378 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-00-449-2378 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 5310-00-449-2378 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-00-449-2378 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 5310-00-449-2378 was assigned to the Federal Catalog?

It was assigned 56 years ago, on Fri, May 15, 1970