The Plug,machine Thread, cataloged under National Stock Number 5365-01-320-8257, 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 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5365-01-320-8257 |
| Primary Part Number | 6227555-1 |
| Item Name | Plug,machine Thread |
| FSC / FSG | 5365 / 53 — Bushings, Rings, Shims, and Spacers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Body Core Diameter | 0.514 INCHES MINIMUM AND 0.524 INCHES MAXIMUM IN |
| Head Height | 0.750 INCHES NOMINAL IN |
| Head Type | CORED |
| Surface Treatment Document and Classification | MIL-C-5541,CL 1A MIL SPEC SINGLE TREATMENT RESPONSE OVERALL A |
| Head Core Diameter | 0.880 INCHES NOMINAL IN |
| Thread Length | 0.750 INCHES NOMINAL EXTERNAL IN |
| Material Document and Classification | ASTM B211,TEMPER T6511 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND EXTERNAL |
| Nominal Thread Size | 1.250 INCHES EXTERNAL IN |
| Surface Treatment | CHROMATE OVERALL |
| Thread Class | 2A EXTERNAL A |
| Thread Quantity Per Inch | 18 EXTERNAL |
| Material | ALUMINUM ALLOY 6061 OVERALL |
| Thread Series Designator | UNEF EXTERNAL |
| 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 |
|---|---|
| 6227555-1 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6227555-1 | 5/9 Secondary reference Vse Corporation |
NSN 5365-01-320-8257 is a Plug,machine Thread, manufactured by Naval Sea Systems Command, classified under FSC 5365, Bushings, Rings, Shims, and Spacers. Status: active.
NSN 5365-01-320-8257 has 1 manufacturer part number on file: 6227555-1 (Naval Sea Systems Command).
Key specifications for 6227555-1: Body Core Diameter: 0.514 INCHES MINIMUM AND 0.524 INCHES MAXIMUM IN; Head Height: 0.750 INCHES NOMINAL IN; Head Type: CORED; Surface Treatment Document and Classification: MIL-C-5541,CL 1A MIL SPEC SINGLE TREATMENT RESPONSE OVERALL A. 14 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.