The Ring,retaining, cataloged under National Stock Number 5325-00-804-7639, 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10 specifications, cited from the U.S. Government catalog. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5325-00-804-7639 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Status | ACTIVE |
| Material Hardness Rating | 63.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 69.5 ROCKWELL SUPERFICIAL 30-N MAXIMUM |
| Usage Design | EXTERNAL |
| Material Document and Classification | AMS 5520 ASSN STD SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | RECTANGULAR |
| Major Thickness | 0.023 INCHES MINIMUM AND 0.027 INCHES MAXIMUM IN |
| Inside Diameter | 0.245 INCHES MINIMUM AND 0.252 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | EXTERNAL |
| Surface Treatment | PASSIVATE |
| Material | STEEL COMP 632 |
| 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 |
|---|---|
| 3100-27-SS2 | 5/9 Secondary reference U.S. Government activity |
| Z5-3 | 5/1 Secondary reference Roller Bearing Co of America, Inc Div Pic Design |
| 5100-27H | 5/9 Secondary reference Truarc Company Llc Dba Waldes Truarc |
| MS16624 4026 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| MS16624-4027 | 2/2 Government specification standardization U.S. Government activity |
| MIL-DTL-21248 | 4/1 Identification reference U.S. Government activity |
| STD885-7 | 5/1 Secondary reference U.S. Government activity |
| 105A902353 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 5100-27H | C/1 Advisory reference — outside the item-of-supply concept Rotor Clip Company, Inc. |
NSN 5325-00-804-7639 is a Ring,retaining, classified under FSC 5325, Fastening Devices. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5325-01-243-7333. Verify interchangeability with system specifications before substitution.
Key specifications for 5325-00-804-7639: Material Hardness Rating: 63.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 69.5 ROCKWELL SUPERFICIAL 30-N MAXIMUM; Usage Design: EXTERNAL; Material Document and Classification: AMS 5520 ASSN STD SINGLE MATERIAL RESPONSE; Cross-Sectional Shape Style: RECTANGULAR. 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.