MS21045-20E

View detailed technical data, stock status, and sourcing information for: MS21045-20E
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-416-0501

Item Name Code

05277

Assigment Date

07/12/1995 (31 years ago)

A resilient metal item, circular or nearly circular, which is designed to be inserted into an internal or external groove and retained by its own spring action, or it may have external prongs or projections designed to be inserted into a hole and retained by spring action of the prongs which grip by imbedding into the material. For items having internal prongs which perform the same function, see push on nut. It is used to keep and/or lock a part(s) in position, as a ball bearing on a shaft or in a housing. See also clip, retaining and pin, lock. Excludes:ring, connecting, round.

soluble lubricant lubrication, prevailing torque all metal design locking feature, 3b thread class, hexagon nut style, 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
Lubrication: soluble lubricant
Nut Style: hexagon
Nut Height: 1.300 inches minimum and 1.454 inches maximum
Width Across Flats: 1.801 inches minimum and 1.814 inches maximum
Temp Rating: 450.0 fahrenheit nominal
Thread Series: unjf
Thread Quantity Per Inch: 12
Nominal Thread Size: 1.250 inches
Bearing Surface Type: chamfered
Bearing Surface Finish: 125.0 microinches
Special Features: elliptical lock
Material: steel overall
Surface Treatment: cadmium and chromate 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
MS21045-20E	Hexagon Self-Locking Nut

FAQs

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

What is the FSCG of the NSN 5310-01-416-0501?

The FSCG of the NSN 5310-01-416-0501 is 5310

Does the NSN 5310-01-416-0501 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-01-416-0501 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 5310-01-416-0501 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-01-416-0501 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 5310-01-416-0501 was assigned to the Federal Catalog?

It was assigned 31 years ago, on Wed, Jul 12, 1995