The Ring,retaining, cataloged under National Stock Number 5325-01-121-5837, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Kalmar AC Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-121-5837 |
| Primary Part Number | 70928278-4 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Kalmar AC Inc |
| Status | ACTIVE |
| Material Hardness Rating | 43.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM |
| Usage Design | EXTERNAL |
| Material Document and Classification | FED STD 66 FED STD SINGLE MATERIAL RESPONSE OR AISI 1060 ASSN STD SINGLE MATERIAL RESPONSE OR SAE 1060 ASSN STD SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | RECTANGULAR |
| Outside Diameter | 2.587 INCHES MINIMUM AND 2.629 INCHES MAXIMUM IN |
| Major Thickness | 0.107 INCHES MINIMUM AND 0.109 INCHES MAXIMUM IN |
| Inside Diameter | 2.157 INCHES MINIMUM AND 2.187 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | INTERNAL STEPPED |
| Material | STEEL COMP 1060 |
| 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 |
|---|---|
| 70928278-4 PRIMARY | Kalmar AC Inc (USA) |
| Reference | Meaning |
|---|---|
| 0928278-1 | 5/9 Secondary reference Kalmar AC Inc |
NSN 5325-01-121-5837 is a Ring,retaining, manufactured by Kalmar AC Inc, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-121-5837 has 1 manufacturer part number on file: 70928278-4 (Kalmar AC Inc).
Key specifications for 70928278-4: Material Hardness Rating: 43.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM; Usage Design: EXTERNAL; Material Document and Classification: FED STD 66 FED STD SINGLE MATERIAL RESPONSE OR AISI 1060 ASSN STD SINGLE MATERIAL RESPONSE OR SAE 1060 ASSN STD 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.