The Ring,retaining, cataloged under National Stock Number 5325-00-449-0264, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Oki Systems Limited. Government technical data includes 11 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-00-449-0264 |
| Primary Part Number | RR406S |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Oki Systems Limited |
| Status | ACTIVE |
| Usage Design | INTERNAL |
| Strength Rating | ERR-060 |
| Material Document and Classification | QQ-S-624, COMP 4340-CANCELED FED SPEC 1ST MATERIAL RESPONSE AND AMS 5519 ASSN STD 2ND MATERIAL RESPONSE |
| Cross-Sectional Shape Style | DOUBLE OVAL |
| Outside Diameter | 4.222 INCHES MINIMUM AND 4.252 INCHES MAXIMUM IN |
| Major Thickness | 0.058 INCHES MINIMUM AND 0.064 INCHES MAXIMUM IN |
| Inside Diameter | 3.756 INCHES MINIMUM AND 3.816 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | SPECIAL FLAT |
| Surface Treatment | PASSIVATE |
| Material | STEEL COMP 4340 AND STEEL COMP 301 |
| 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 |
|---|---|
| RR406S | Oki Systems Limited (USA) |
| Reference | Meaning |
|---|---|
| WH-406-S02 | 5/1 Secondary reference Smalley Steel Ring Co. |
| RR406S | 3/2 Design control — primary reference U.S. Government activity |
NSN 5325-00-449-0264 is a Ring,retaining, manufactured by Oki Systems Limited, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-449-0264 has 1 manufacturer part number on file: RR406S (Oki Systems Limited).
Key specifications for RR406S: Usage Design: INTERNAL; Strength Rating: ERR-060; Material Document and Classification: QQ-S-624, COMP 4340-CANCELED FED SPEC 1ST MATERIAL RESPONSE AND AMS 5519 ASSN STD 2ND MATERIAL RESPONSE; Cross-Sectional Shape Style: DOUBLE OVAL. 11 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.