NAS51-56

View detailed technical data, stock status, and sourcing information for: NAS51-56
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5325 Fastening Devices

National Stock Number

5325-00-803-7306

Item Name Code

07623

Assigment Date

01/01/1962 (64 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.

external ring style, 0.033 inches minimum and 0.037 inches maximum major thickness, 0.511 inches minimum and 0.526 inches maximum inside diameter, rectangular cross-sectional shape style, not casehardened casehardening indicator

Product Characteristics

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

Cross-Sectional Shape Style: rectangular
Inside Diameter: 0.511 inches minimum and 0.526 inches maximum
Casehardening Indicator: not casehardened
Major Thickness: 0.033 inches minimum and 0.037 inches maximum
Ring Style: external
Usage Design: external
Material Hardness Rating: 66.0 rockwell superficial 30-n minimum and 71.0 rockwell superficial 30-n maximum
Material: steel comp 1066 or steel comp 1069 or steel comp 1070 or steel comp 1072 or steel comp 1074 or steel comp 1075 or steel comp 1078 or steel comp 1080 or steel comp 1084 or steel comp 1086 or steel comp 1090
Material Document And Classification: fed std 66 aisi 1066 or 1069 or 1070 or 1072 or 1074 or 1075 or 1078 or 1080 or 1084 or 1086 or 1090 fed std single material response

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5340-00-053-0248	No Name Available	01/01/1960
5340-00-088-8200	No Name Available	09/18/1967
5325-00-282-0796	No Name Available	07/23/2019
5325-00-526-2108	No Name Available	07/01/2007
5340-00-680-8732	No Name Available	09/18/1967
5325-00-840-2024	No Name Available	06/04/2008

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
2612152	Retaining Ring
3100-56	Retaining Ring
3100-56-ST-CD	Retaining Ring
3100-56-ST-PA	Retaining Ring
3100-56CD	Retaining Ring
418-010-180	Retaining Ring
42R2051-65	Retaining Ring
5100-56-S-MD	Retaining Ring
5100-56-S-PP	Retaining Ring
5100-56MD	Retaining Ring
5100-56MDZD	Retaining Ring
5100-56MF	Retaining Ring
5100-56PP	Retaining Ring
5100-56ZD	Retaining Ring
5325008037306	Retaining Ring
5325PL0845877	Retaining Ring
5365008037306	Retaining Ring
MIL-R-21248BTY1CL2	Retaining Ring
MS16624-1056	Retaining Ring
MS16624-56	Retaining Ring
NAS51-56	Retaining Ring
NAS670-56	Retaining Ring
S2190-4	Retaining Ring
SM-D-333563-2	Retaining Ring

FAQs

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

What is the FSCG of the NSN 5325-00-803-7306?

The FSCG of the NSN 5325-00-803-7306 is 5325

Does the NSN 5325-00-803-7306 have a Schedule B code assigned?

Yes, the Schedule B code is 9606100000

Does NSN 5325-00-803-7306 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 5325-00-803-7306 contain precious materials?

Item does not contain precious metal.

Does NSN 5325-00-803-7306 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 5325-00-803-7306 was assigned to the Federal Catalog?

It was assigned 64 years ago, on Mon, Jan 1, 1962