The Screw,machine, cataloged under National Stock Number 5305-01-028-8729, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Telemechanics Inc. Government technical data includes 12 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 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 | 5305-01-028-8729 |
| Primary Part Number | 400454 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Telemechanics Inc |
| Status | ACTIVE |
| Head Height | 0.078 INCHES NOMINAL IN |
| Screw Surface Treatment | OXIDE |
| Fastener Length | 0.562 INCHES NOMINAL IN |
| Thread Length | 0.312 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.138 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.250 INCHES NOMINAL IN |
| Screw Material | STEEL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 40 |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| 400454 PRIMARY | Telemechanics Inc (USA) |
NSN 5305-01-028-8729 is a Screw,machine, manufactured by Telemechanics Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-028-8729 has 1 manufacturer part number on file: 400454 (Telemechanics Inc).
2 possible matches (shared part number, not a government interchangeability claim): 5330-01-179-4242, 6515-01-702-8495. Verify interchangeability with system specifications before substitution.
Key specifications for 400454: Head Height: 0.078 INCHES NOMINAL IN; Screw Surface Treatment: OXIDE; Fastener Length: 0.562 INCHES NOMINAL IN; Thread Length: 0.312 INCHES NOMINAL IN. 12 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.