The Ring,retaining, cataloged under National Stock Number 5325-01-277-8268, 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. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5325-01-277-8268 |
| Primary Part Number | 0441B0211 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Lockheed Martin Corporation Div Rms |
| Status | ACTIVE |
| Usage Design | EXTERNAL |
| End Style | 90 DEGREE PARALLEL |
| Material Diameter | 0.020 INCHES MINIMUM AND 0.024 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | ROUND |
| Outside Diameter | 0.224 INCHES NOMINAL IN |
| Inside Diameter | 0.190 INCHES MINIMUM AND 0.202 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | STRAIGHT GAP |
| Surface Treatment | ZINC |
| 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 |
|---|---|
| 0441B0211 | Lockheed Martin Corporation Div Rms (USA) |
| Reference | Meaning |
|---|---|
| 0441B0211 | 5/9 Secondary reference Martin Marietta Technologies Inc Sub of Martin Marietta Corp Aero and Naval Systems |
| SR35 | 3/9 Design control — primary reference Southco Inc |
NSN 5325-01-277-8268 is a Ring,retaining, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-277-8268 has 1 manufacturer part number on file: 0441B0211 (Lockheed Martin Corporation Div Rms).
1 possible match (shared part number, not a government interchangeability claim): 5945-01-386-0453. Verify interchangeability with system specifications before substitution.
Key specifications for 0441B0211: Usage Design: EXTERNAL; End Style: 90 DEGREE PARALLEL; Material Diameter: 0.020 INCHES MINIMUM AND 0.024 INCHES MAXIMUM IN; Cross-Sectional Shape Style: ROUND. 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.