The Ring,retaining, cataloged under National Stock Number 5325-00-377-4131, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-00-377-4131 |
| Primary Part Number | 4001865 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Usage Design | EXTERNAL |
| End Style | 90 DEGREE PARALLEL |
| Material Diameter | 0.060 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5698 ASSN STD SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | ROUND |
| Outside Diameter | 6.140 INCHES MINIMUM AND 6.300 INCHES MAXIMUM IN |
| Inside Diameter | 6.010 INCHES MINIMUM AND 6.180 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | STRAIGHT GAP |
| Material | NICKEL ALLOY X-750 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| 4001865 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 4001865 | Rtx Corporation Div Pratt & Whitney (USA) |
| Reference | Meaning |
|---|---|
| 4001865 | 5/9 Secondary reference American Tubular Elevator Co |
| 5325PL0789072 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 4001865 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| 4001865 | 5/9 Secondary reference Norton Canada Inc |
| 4001865 | 3/9 Design control — primary reference Kaydon Ring & Seal Inc Dba Skf Precision Technologies |
| 4001865 | 5/9 Secondary reference Sargent Aerospace & Defense, Llc Dba Airtomic Div Sargent |
NSN 5325-00-377-4131 is a Ring,retaining, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-377-4131 has 2 manufacturer part numbers on file: 4001865 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 4001865 (Rtx Corporation Div Pratt & Whitney).
Key specifications for 4001865: Usage Design: EXTERNAL; End Style: 90 DEGREE PARALLEL; Material Diameter: 0.060 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN; Material Document and Classification: AMS 5698 ASSN STD SINGLE MATERIAL RESPONSE. 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.