The Ring,retaining, cataloged under National Stock Number 5325-00-488-4155, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Greene Tweed & Co Inc. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-00-488-4155 |
| Primary Part Number | 431MK2N |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Greene Tweed & Co Inc |
| Status | ACTIVE |
| Usage Design | EXTERNAL |
| End Style | D SHAPE ABOVE INSIDE PERIPHERY |
| Cross-Sectional Shape Style | RECTANGULAR |
| Outside Diameter | 5.724 INCHES NOMINAL IN |
| Major Thickness | 0.093 INCHES NOMINAL IN |
| Inside Diameter | 5.349 INCHES NOMINAL IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | ANGULAR CAP |
| Material | PLASTIC POLYAMIDE NYLON |
| 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 |
|---|---|
| 431MK2N PRIMARY | Greene Tweed & Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 431MK2N | 5/9 Secondary reference Palmetto Inc |
NSN 5325-00-488-4155 is a Ring,retaining, manufactured by Greene Tweed & Co Inc, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-488-4155 has 1 manufacturer part number on file: 431MK2N (Greene Tweed & Co Inc).
Key specifications for 431MK2N: Usage Design: EXTERNAL; End Style: D SHAPE ABOVE INSIDE PERIPHERY; Cross-Sectional Shape Style: RECTANGULAR; Outside Diameter: 5.724 INCHES NOMINAL IN. 9 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.