The Ring,retaining, cataloged under National Stock Number 5325-01-175-1981, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Legacy Am&m. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-175-1981 |
| Primary Part Number | L4801528-003 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | The Boeing Company Div Legacy Am&m |
| Status | ACTIVE |
| Usage Design | EXTERNAL |
| End Style | 90 DEGREE PARALLEL |
| Material Document and Classification | QQ-A-225/6, T851 FED SPEC SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | RECTANGULAR |
| Outside Diameter | 4.540 INCHES NOMINAL IN |
| Major Thickness | 0.100 INCHES NOMINAL IN |
| Inside Diameter | 4.040 INCHES MINIMUM AND 4.050 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | STRAIGHT GAP |
| Material | ALUMINUM ALLOY 2024 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| L4801528-003 PRIMARY | The Boeing Company Div Legacy Am&m (USA) |
NSN 5325-01-175-1981 is a Ring,retaining, manufactured by The Boeing Company Div Legacy Am&m, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-175-1981 has 1 manufacturer part number on file: L4801528-003 (The Boeing Company Div Legacy Am&m).
Key specifications for L4801528-003: Usage Design: EXTERNAL; End Style: 90 DEGREE PARALLEL; Material Document and Classification: QQ-A-225/6, T851 FED SPEC 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.
NSN 5325-01-175-1981 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.