The Ring,retaining, cataloged under National Stock Number 5325-01-299-6170, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Qioptiq Ltd. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-299-6170 |
| Primary Part Number | 031278 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Qioptiq Ltd |
| Status | ACTIVE |
| Usage Design | INTERNAL |
| Material Document and Classification | AISI 1074 ASSN STD SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | RECTANGULAR |
| Outside Diameter | 0.623 INCHES MINIMUM AND 0.627 INCHES MAXIMUM IN |
| Major Thickness | 0.009 INCHES MINIMUM AND 0.011 INCHES MAXIMUM IN |
| Inside Diameter | 0.380 INCHES MINIMUM AND 0.400 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | INTERNAL SELF-LOCKING |
| Surface Treatment | PHOSPHATE ZINC |
| Material | STEEL COMP 1074 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 031278 | Qioptiq Ltd (GBR) |
| 5005-62PP | Itw Limited T/a Avery Weigh-Tronix (GBR) |
| Reference | Meaning |
|---|---|
| 5005-62 PP | 3/9 Design control — primary reference Truarc Company Llc Dba Waldes Truarc |
| 5005-62 PP | C/1 Advisory reference — outside the item-of-supply concept Rotor Clip Company, Inc. |
NSN 5325-01-299-6170 is a Ring,retaining, manufactured by Qioptiq Ltd, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-299-6170 has 2 manufacturer part numbers on file: 031278 (Qioptiq Ltd), 5005-62PP (Itw Limited T/a Avery Weigh-Tronix).
1 possible match (shared part number, not a government interchangeability claim): 6640-01-488-6653. Verify interchangeability with system specifications before substitution.
Key specifications for 031278: Usage Design: INTERNAL; Material Document and Classification: AISI 1074 ASSN STD SINGLE MATERIAL RESPONSE; Cross-Sectional Shape Style: RECTANGULAR; Outside Diameter: 0.623 INCHES MINIMUM AND 0.627 INCHES MAXIMUM IN. 10 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
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.