The Ring,retaining, cataloged under National Stock Number 5325-01-190-0768, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Worth Mfg Co. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-190-0768 |
| Primary Part Number | KR4 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Worth Mfg Co |
| Status | ACTIVE |
| Usage Design | EXTERNAL OR INTERNAL |
| Material Diameter | 0.079 INCHES MINIMUM AND 0.089 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | ROUND |
| Outside Diameter | 1.095 INCHES MINIMUM AND 1.115 INCHES MAXIMUM IN |
| Inside Diameter | 0.927 INCHES MINIMUM AND 0.947 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | SPLIT |
| Material | STEEL |
| 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 |
|---|---|
| KR4 PRIMARY | Worth Mfg Co (USA) |
| Reference | Meaning |
|---|---|
| 4202412-3 | 1/2 Source control — Government-approved source U.S. Government activity |
NSN 5325-01-190-0768 is a Ring,retaining, manufactured by Worth Mfg Co, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-190-0768 has 1 manufacturer part number on file: KR4 (Worth Mfg Co).
2 possible matches (shared part number, not a government interchangeability claim): 5365-01-243-0460, 5315-01-265-6340. Verify interchangeability with system specifications before substitution.
Key specifications for KR4: Usage Design: EXTERNAL OR INTERNAL; Material Diameter: 0.079 INCHES MINIMUM AND 0.089 INCHES MAXIMUM IN; Cross-Sectional Shape Style: ROUND; Outside Diameter: 1.095 INCHES MINIMUM AND 1.115 INCHES MAXIMUM IN. 8 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.