The Ring,retaining, cataloged under National Stock Number 5325-01-239-8161, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Deere & Co. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-239-8161 |
| Primary Part Number | B190R |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Deere & Co |
| Status | ACTIVE |
| Material Hardness Rating | 43.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM |
| Usage Design | INTERNAL |
| End Style | D SHAPE ABOVE INSIDE PERIPHERY |
| Material Document and Classification | ASTM A227-47 ASSN STD SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | RECTANGULAR |
| Outside Diameter | 3.657 INCHES NOMINAL IN |
| Major Thickness | 0.123 INCHES MINIMUM AND 0.127 INCHES MAXIMUM IN |
| Inside Diameter | 3.281 INCHES NOMINAL IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | STRAIGHT GAP |
| Material | STEEL UNS K06501 |
| 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 |
|---|---|
| B190R PRIMARY | Deere & Co (USA) |
NSN 5325-01-239-8161 is a Ring,retaining, manufactured by Deere & Co, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-239-8161 has 1 manufacturer part number on file: B190R (Deere & Co).
Key specifications for B190R: Material Hardness Rating: 43.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM; Usage Design: INTERNAL; End Style: D SHAPE ABOVE INSIDE PERIPHERY; Material Document and Classification: ASTM A227-47 ASSN STD SINGLE MATERIAL RESPONSE. 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.