The Ring,connecting,round, cataloged under National Stock Number 5365-00-281-2187, is classified within Federal Supply Class 5365 (Bushings, Rings, Shims, and Spacers) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5365-00-281-2187 |
| Primary Part Number | 5971730-6 |
| Item Name | Ring,connecting,round |
| FSC / FSG | 5365 / 53 — Bushings, Rings, Shims, and Spacers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Stock Size | 1.000 IN. DIA IN |
| Inside Diameter | 4.000 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE |
| Material | STEEL CORROSION RESISTING |
| Construction | ENDLESS |
| 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 |
|---|---|
| 5971730-6 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 21596 | 5/9 Secondary reference United States Department of the Navy Dba Naval Surface Warfare Center Panama City |
NSN 5365-00-281-2187 is a Ring,connecting,round, manufactured by Naval Sea Systems Command, classified under FSC 5365, Bushings, Rings, Shims, and Spacers. Status: active.
NSN 5365-00-281-2187 has 1 manufacturer part number on file: 5971730-6 (Naval Sea Systems Command).
Key specifications for 5971730-6: Weight: 3.100 POUNDS NOMINAL LBS; Stock Size: 1.000 IN. DIA IN; Inside Diameter: 4.000 INCHES NOMINAL IN; Special Features: MATL IS ASTM A276, UNS S20910 OR ASTM A314, UNS S20910; PASSIVATION IS TY 6 OR TY 7. 5 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.