Ring, Retaining5325-01-161-2187

NSN 5325-01-161-2187 · NIIN 011612187

FSC 5325 — Fastening Devices · FSG 53 — Hardware and Abrasives

Government record, cited

Also searched as 5325-01-161-2187 · 5325011612187 · NIIN 011612187 · 01-161-2187 · FSC 5325 Fastening Devices · 77643-42X9 PIECE 19 · SSN637-501-2159964 PIECE 19

Nearby stock numbers ← 5325-01-161-2137 Ring, Retaining · 5325-01-161-2247 Grommet →

Features

Ring,retaining — FSC 5325
Usage Design: INTERNAL
End Style: 90 DEGREE PARALLEL
Material Document and Classification: QQ-N-281, CLASS A FED SPEC SINGLE MATERIAL RESPONSE
Cross-Sectional Shape Style: RECTANGULAR
Outside Diameter: 1.121 INCHES MINIMUM AND 1.123 INCHES MAXIMUM IN
Major Thickness: 0.240 INCHES MINIMUM AND 0.248 INCHES MAXIMUM IN
Inside Diameter: 0.742 INCHES MINIMUM AND 0.747 INCHES MAXIMUM IN

Identification

NSN: 5325-01-161-2187
NIIN: 011612187
FSC: 5325 — Fastening Devices
FSG: 53 — Hardware and Abrasives

General Description

The Ring,retaining, cataloged under National Stock Number 5325-01-161-2187, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	5325-01-161-2187
Item Name	Ring,retaining
FSC / FSG	5325 / 53 — Fastening Devices
Status	ACTIVE
Usage Design	INTERNAL
End Style	90 DEGREE PARALLEL
Material Document and Classification	QQ-N-281, CLASS A FED SPEC SINGLE MATERIAL RESPONSE
Cross-Sectional Shape Style	RECTANGULAR
Outside Diameter	1.121 INCHES MINIMUM AND 1.123 INCHES MAXIMUM IN
Major Thickness	0.240 INCHES MINIMUM AND 0.248 INCHES MAXIMUM IN
Inside Diameter	0.742 INCHES MINIMUM AND 0.747 INCHES MAXIMUM IN
Casehardening Indicator	NOT CASEHARDENED
Ring Style	STRAIGHT GAP
Material	NICKEL ALLOY 400

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

Cross-Reference Index

No manufacturer part numbers on file in the U.S. Government catalog.

Reference documents

Reference	Meaning
77643-42X9 PIECE 19	5/2 Secondary reference U.S. Government activity
SSN637-501-2159964 PIECE 19	3/2 Design control — primary reference U.S. Government activity

No interchangeability data on file.

Other items in FSC 5325 — Fastening Devices

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

5325-00-000-1884

5325-00-000-1884 · Item name not on file

5325-00-000-9988

5325-00-000-9988 · Item name not on file

5325-00-001-1567

RING,RETAINING

5325-00-001-2043

FASTENER,PANEL

5325-00-001-3842

RING,RETAINING

5325-00-001-3858

5325-00-001-3858 · Item name not on file

5325-00-001-3871

RING,RETAINING

5325-00-001-4317

RING,RETAINING

Frequently Asked Questions

What is NSN 5325-01-161-2187?

NSN 5325-01-161-2187 is a Ring,retaining, classified under FSC 5325, Fastening Devices. Status: active.

What are the specifications of 5325-01-161-2187?

Key specifications for 5325-01-161-2187: Usage Design: INTERNAL; End Style: 90 DEGREE PARALLEL; Material Document and Classification: QQ-N-281, CLASS A FED SPEC SINGLE MATERIAL RESPONSE; Cross-Sectional Shape Style: RECTANGULAR. 10 specifications are documented in the U.S. Government catalog.

Is NSN 5325-01-161-2187 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.

✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.

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