The Ring,retaining, cataloged under National Stock Number 5325-01-503-0270, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-503-0270 |
| Primary Part Number | 1810145-1 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Material Document and Classification | SAE 1069 ASSN STD 1ST MATERIAL RESPONSE OR SAE 1070 ASSN STD 2ND MATERIAL RESPONSE OR SAE 1074 ASSN STD 3RD MATERIAL RESPONSE OR SAE 1075 ASSN STD 4TH MATERIAL RESPONSE OR SAE 1078 ASSN STD 5TH MATERIAL RESPONSE OR SAE 1080 ASSN STD 6TH MATERIAL RESPONSE |
| Outside Diameter | 3.875 INCHES MINIMUM AND 3.895 INCHES MAXIMUM IN |
| End Play Takeup | 0.310 INCHES NOMINAL IN |
| Ring Style | WAVE |
| Material | STEEL COMP 1070 OR STEEL COMP 1069 OR STEEL COMP 1074 OR STEEL COMP 1075 OR STEEL COMP 1078 OR STEEL COMP 1080 |
| 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 |
|---|---|
| SSR-0387-N | Smalley Steel Ring Co. (USA) |
| 1810145-1 PRIMARY | Northrop Grumman Systems Corporation (USA) |
NSN 5325-01-503-0270 is a Ring,retaining, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-503-0270 has 2 manufacturer part numbers on file: SSR-0387-N (Smalley Steel Ring Co.), 1810145-1 (Northrop Grumman Systems Corporation).
Key specifications for 1810145-1: Material Document and Classification: SAE 1069 ASSN STD 1ST MATERIAL RESPONSE OR SAE 1070 ASSN STD 2ND MATERIAL RESPONSE OR SAE 1074 ASSN STD 3RD MATERIAL RESPONSE OR SAE 1075 ASSN STD 4TH MATERIAL RESPONSE OR SAE 1078 ASSN STD 5TH MATERIAL RESPONSE OR SAE 1080 ASSN STD 6TH MATERIAL RESPONSE; Outside Diameter: 3.875 INCHES MINIMUM AND 3.895 INCHES MAXIMUM IN; End Play Takeup: 0.310 INCHES NOMINAL IN; Ring Style: WAVE. 5 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.