The Plug,machine Thread, cataloged under National Stock Number 5365-01-644-5491, is classified within Federal Supply Class 5365 (Bushings, Rings, Shims, and Spacers) of the Hardware and Abrasives group. The manufacturer of record is Brennan Industries. Government technical data includes 10 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 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 | 5365-01-644-5491 |
| Primary Part Number | 6408-H04-O |
| Item Name | Plug,machine Thread |
| FSC / FSG | 5365 / 53 — Bushings, Rings, Shims, and Spacers |
| Manufacturer | Brennan Industries |
| Status | ACTIVE |
| Head Type | CORED |
| Connection Style | EXTERNAL SEAT FOR GASKET SEAL |
| Style Designator | PLUG, MACHINE |
| Material Document and Classification | SAE90109B FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Features Provided | O RING |
| Thread Direction | RIGHT-HAND EXTERNAL |
| Nominal Thread Size | 0.750 INCHES EXTERNAL IN |
| Thread Class | 2A EXTERNAL A |
| Thread Quantity Per Inch | 16 EXTERNAL |
| Material | STEEL COMP 316 OVERALL |
| 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 |
|---|---|
| 6408-H04-O PRIMARY | Brennan Industries (USA) |
NSN 5365-01-644-5491 is a Plug,machine Thread, manufactured by Brennan Industries, classified under FSC 5365, Bushings, Rings, Shims, and Spacers. Status: active.
NSN 5365-01-644-5491 has 1 manufacturer part number on file: 6408-H04-O (Brennan Industries).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-656-3966. Verify interchangeability with system specifications before substitution.
Key specifications for 6408-H04-O: Head Type: CORED; Connection Style: EXTERNAL SEAT FOR GASKET SEAL; Style Designator: PLUG, MACHINE; Material Document and Classification: SAE90109B FED STD SINGLE MATERIAL RESPONSE OVERALL. 10 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.