The Ring,retaining, cataloged under National Stock Number 5325-01-237-1177, 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10 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5325-01-237-1177 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Status | ACTIVE |
| Usage Design | INTERNAL |
| Strength Rating | ERR-060 |
| Material Document and Classification | AMS 4530 ASSN STD 2ND MATERIAL RESPONSE OR ASTM B194 ASSN STD ALL MATERIAL RESPONSES OR QQ-C-533 FED SPEC ALL MATERIAL RESPONSES |
| Cross-Sectional Shape Style | DOUBLE OVAL |
| Outside Diameter | 1.312 INCHES MINIMUM AND 1.327 INCHES MAXIMUM IN |
| Major Thickness | 0.031 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN |
| Inside Diameter | 1.102 INCHES MINIMUM AND 1.117 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | SPECIAL FLAT |
| Material | COPPER ALLOY 170 OR COPPER ALLOY 172 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| PRB-131-M | 3/2 Design control — primary reference U.S. Government activity |
| M24231/7-041 | 5/9 Secondary reference U.S. Government activity |
| M24231/7-014 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| M24231/7-041 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5325-01-237-1177 is a Ring,retaining, classified under FSC 5325, Fastening Devices. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5325-01-641-7716. Verify interchangeability with system specifications before substitution.
Key specifications for 5325-01-237-1177: Usage Design: INTERNAL; Strength Rating: ERR-060; Material Document and Classification: AMS 4530 ASSN STD 2ND MATERIAL RESPONSE OR ASTM B194 ASSN STD ALL MATERIAL RESPONSES OR QQ-C-533 FED SPEC ALL MATERIAL RESPONSES; Cross-Sectional Shape Style: DOUBLE OVAL. 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.