The Ring,retaining, cataloged under National Stock Number 5325-01-396-8019, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation Div Rotary and Mission Systems. Government technical data includes 11 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-396-8019 |
| Primary Part Number | 181A277-1 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Lockheed Martin Corporation Div Rotary and Mission Systems |
| Status | ACTIVE |
| Usage Design | EXTERNAL |
| End Style | 90 DEGREE PARALLEL |
| Material Document and Classification | QQ-A-250/8, ALLOY 5052, H32 FED SPEC SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | RECTANGULAR |
| Outside Diameter | 7.364 INCHES MINIMUM AND 7.886 INCHES MAXIMUM IN |
| Major Thickness | 0.057 INCHES MINIMUM AND 0.068 INCHES MAXIMUM IN |
| Inside Diameter | 7.250 INCHES MINIMUM AND 7.750 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | STRAIGHT GAP |
| Surface Treatment | CHROMATE AND PLASTIC POLYURETHANE |
| Material | ALUMINUM ALLOY 5052 |
| 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 |
|---|---|
| 181A277-1 PRIMARY | Lockheed Martin Corporation Div Rotary and Mission Systems (USA) |
NSN 5325-01-396-8019 is a Ring,retaining, manufactured by Lockheed Martin Corporation Div Rotary and Mission Systems, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-396-8019 has 1 manufacturer part number on file: 181A277-1 (Lockheed Martin Corporation Div Rotary and Mission Systems).
Key specifications for 181A277-1: Usage Design: EXTERNAL; End Style: 90 DEGREE PARALLEL; Material Document and Classification: QQ-A-250/8, ALLOY 5052, H32 FED SPEC SINGLE MATERIAL RESPONSE; Cross-Sectional Shape Style: RECTANGULAR. 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.