The Ring,connecting,round, cataloged under National Stock Number 5365-01-243-0460, is classified within Federal Supply Class 5365 (Bushings, Rings, Shims, and Spacers) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corp. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5365-01-243-0460 |
| Primary Part Number | ST51D2-1 |
| Item Name | Ring,connecting,round |
| FSC / FSG | 5365 / 53 — Bushings, Rings, Shims, and Spacers |
| Manufacturer | Lockheed Martin Corp |
| Status | ACTIVE |
| Material Document and Classification | QQ-S-763, CLASS 410 FED SPEC SINGLE MATERIAL RESPONSE |
| Stock Size | 0.080 IN. DIA IN |
| Inside Diameter | 0.920 INCHES NOMINAL IN |
| Material | STEEL COMP 410 |
| Construction | SPLIT |
| 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 |
|---|---|
| ST51D2-1 PRIMARY | Lockheed Martin Corp (USA) |
| Reference | Meaning |
|---|---|
| 19-51371 | 5/9 Secondary reference U.S. Government activity |
| KR4 | 5/9 Secondary reference U.S. Government activity |
NSN 5365-01-243-0460 is a Ring,connecting,round, manufactured by Lockheed Martin Corp, classified under FSC 5365, Bushings, Rings, Shims, and Spacers. Status: active.
NSN 5365-01-243-0460 has 1 manufacturer part number on file: ST51D2-1 (Lockheed Martin Corp).
1 possible match (shared part number, not a government interchangeability claim): 5315-01-265-6340. Verify interchangeability with system specifications before substitution.
Key specifications for ST51D2-1: Material Document and Classification: QQ-S-763, CLASS 410 FED SPEC SINGLE MATERIAL RESPONSE; Stock Size: 0.080 IN. DIA IN; Inside Diameter: 0.920 INCHES NOMINAL IN; Material: STEEL COMP 410. 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.