The Ring,retaining, cataloged under National Stock Number 5325-01-422-9644, 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 10 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-422-9644 |
| Primary Part Number | NGR540ER12P |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Usage Design | INTERNAL |
| Supplementary Features | OUTSIDE DIA IS 0.380-0.400 IN. IN |
| Material Document and Classification | MIL-S-25043 MIL SPEC SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | RECTANGULAR |
| Major Thickness | 0.030 INCHES MINIMUM AND 0.040 INCHES MAXIMUM IN |
| Inside Diameter | 0.255 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | E |
| Surface Treatment | CADMIUM AND CHROMATE |
| Material | STEEL COMP 631 |
| 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 |
|---|---|
| NGR540ER12P PRIMARY | Northrop Grumman Systems Corporation (USA) |
| FT1761-12 PRIMARY | Fastener Technology Corp (USA) |
| Reference | Meaning |
|---|---|
| 5365PL1806892 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| C100110-12 | 7/2 Vendor item drawing reference U.S. Government activity |
| 5365PL1825300 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 5365PL0941123 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 5325-01-422-9644 is a Ring,retaining, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-422-9644 has 2 manufacturer part numbers on file: NGR540ER12P (Northrop Grumman Systems Corporation), FT1761-12 (Fastener Technology Corp).
Key specifications for NGR540ER12P: Usage Design: INTERNAL; Supplementary Features: OUTSIDE DIA IS 0.380-0.400 IN. IN; Material Document and Classification: MIL-S-25043 MIL 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.
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.