The Ring,retaining, cataloged under National Stock Number 5325-00-281-3598, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation Div Rms - Mitchel Field. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-00-281-3598 |
| Primary Part Number | 183-12 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Lockheed Martin Corporation Div Rms - Mitchel Field |
| Status | ACTIVE |
| Material Hardness Rating | 47.0 ROCKWELL C MINIMUM AND 56.0 ROCKWELL C MAXIMUM |
| Usage Design | EXTERNAL |
| Strength Rating | ERR-060 |
| Material Document and Classification | QQ-S-631 FED SPEC SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | RECTANGULAR |
| Major Thickness | 0.024 INCHES MINIMUM AND 0.027 INCHES MAXIMUM IN |
| Inside Diameter | 0.276 INCHES MINIMUM AND 0.283 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | EXTERNAL |
| Surface Treatment | ZINC OR CADMIUM AND DICHROMATE |
| Material | STEEL |
| 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 |
|---|---|
| 25704-281265-18-0 | Knds Deutschland Gmbh & Co. Kg - Werk Kassel - (DEU) |
| 583029 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 25704-281265-18-0 | Baainbw Dokumente Ohne Nutzungsrechte Des Baainbw Fur Beschaffungszwecke (DEU) |
| 183-12 PRIMARY | Lockheed Martin Corporation Div Rms - Mitchel Field (USA) |
| 583029 | Liebherr-Aerospace Lindenberg Gmbh (DEU) |
| Reference | Meaning |
|---|---|
| 583029 | 5/9 Secondary reference Feinmechanische Werke Mainz Gmbh |
NSN 5325-00-281-3598 is a Ring,retaining, manufactured by Lockheed Martin Corporation Div Rms - Mitchel Field, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-281-3598 has 5 manufacturer part numbers on file: 25704-281265-18-0 (Knds Deutschland Gmbh & Co. Kg - Werk Kassel -), 583029 (U S Army Tank Automotive Command Amsta-Im-Mm), 25704-281265-18-0 (Baainbw Dokumente Ohne Nutzungsrechte Des Baainbw Fur Beschaffungszwecke), 183-12 (Lockheed Martin Corporation Div Rms - Mitchel Field), 583029 (Liebherr-Aerospace Lindenberg Gmbh).
5 possible matches (shared part number, not a government interchangeability claim): 1630-00-651-9655, 5305-00-990-1347, 5955-01-042-0156. Verify interchangeability with system specifications before substitution.
Key specifications for 183-12: Material Hardness Rating: 47.0 ROCKWELL C MINIMUM AND 56.0 ROCKWELL C MAXIMUM; Usage Design: EXTERNAL; Strength Rating: ERR-060; Material Document and Classification: QQ-S-631 FED SPEC SINGLE MATERIAL RESPONSE. 11 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.