The Ring,retaining, cataloged under National Stock Number 5325-00-281-3635, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Smalley Steel Ring Co.. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5325-00-281-3635 |
| Primary Part Number | RS156C |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Smalley Steel Ring Co. |
| Status | ACTIVE |
| Material Hardness Rating | 45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM |
| Usage Design | EXTERNAL |
| Strength Rating | ERR-060 |
| Material Document and Classification | ASTM A576 COMP 1070,1074,1080,1085 OR 1090 ASSN STD SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | DOUBLE OVAL |
| Outside Diameter | 1.706 INCHES NOMINAL IN |
| Major Thickness | 0.048 INCHES NOMINAL IN |
| Inside Diameter | 1.490 INCHES NOMINAL IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | SPIRAL |
| Surface Treatment | CADMIUM |
| Material | STEEL COMP 1070 OR STEEL COMP 1074 OR STEEL COMP 1080 OR STEEL COMP 1085 OR STEEL COMP 1090 |
| 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 |
|---|---|
| RS156C | Smalley Steel Ring Co. (USA) |
| Reference | Meaning |
|---|---|
| RS156C | 3/2 Design control — primary reference U.S. Government activity |
NSN 5325-00-281-3635 is a Ring,retaining, manufactured by Smalley Steel Ring Co., classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-281-3635 has 1 manufacturer part number on file: RS156C (Smalley Steel Ring Co.).
Key specifications for RS156C: Material Hardness Rating: 45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM; Usage Design: EXTERNAL; Strength Rating: ERR-060; Material Document and Classification: ASTM A576 COMP 1070,1074,1080,1085 OR 1090 ASSN STD SINGLE MATERIAL RESPONSE. 12 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.