The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-549-5057, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Barnes Group Inc. Dba Barnes Distribution. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5305-01-549-5057 |
| Primary Part Number | 44458 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Barnes Group Inc. Dba Barnes Distribution |
| Status | ACTIVE |
| Fastener Length | 30.0 MILLIMETERS NOMINAL MM |
| Thread Pitch in Millimeters | 1.25 |
| Nominal Thread Diameter | 8.0 MILLIMETERS MM |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Material | STEEL PROPERTY CLASS 10.9 OVERALL |
| Thread Series Designator | M |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5305-01-549-5057 is a Screw,cap,hexagon Head, manufactured by Barnes Group Inc. Dba Barnes Distribution, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-549-5057 has 2 manufacturer part numbers on file: 44458 (Barnes Group Inc. Dba Barnes Distribution), 3003019 (Barnes Group Inc. Dba Barnes Distribution).
2 possible matches (shared part number, not a government interchangeability claim): 6220-01-550-0843, 4730-01-669-1883. Verify interchangeability with system specifications before substitution.
Key specifications for 44458: Fastener Length: 30.0 MILLIMETERS NOMINAL MM; Thread Pitch in Millimeters: 1.25; Nominal Thread Diameter: 8.0 MILLIMETERS MM; Head Style: HEXAGON. 7 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.