The Screw,shoulder, cataloged under National Stock Number 5305-01-491-0201, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Accurate Manufactured Products Group Inc. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers 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 | 5305-01-491-0201 |
| Primary Part Number | STR60158C80 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Accurate Manufactured Products Group Inc |
| Status | ACTIVE |
| Width Across Flats | 0.313 INCHES NOMINAL IN |
| Head Height | 0.375 INCHES NOMINAL IN |
| Fastener Length | 5.750 INCHES NOMINAL IN |
| Shoulder Diameter | 0.005 INCHES NOMINAL OVERALL IN |
| Thread Length | 0.750 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | KNURLED NO. 2 |
| Thread Direction | RIGHT-HAND |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 13 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.875 INCHES NOMINAL IN |
| 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 |
|---|---|
| 91259A814 | Mcmaster-Carr Supply Co (USA) |
| STR60158C80 PRIMARY | Accurate Manufactured Products Group Inc (USA) |
| 26385 PRIMARY | Fastenal Company Dba Fastenal Co (USA) |
| 91259A814 PRIMARY | Accurate Manufactured Products Group Inc (USA) |
NSN 5305-01-491-0201 is a Screw,shoulder, manufactured by Accurate Manufactured Products Group Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-491-0201 has 4 manufacturer part numbers on file: 91259A814 (Mcmaster-Carr Supply Co), STR60158C80 (Accurate Manufactured Products Group Inc), 26385 (Fastenal Company Dba Fastenal Co), 91259A814 (Accurate Manufactured Products Group Inc).
1 possible match (shared part number, not a government interchangeability claim): 6530-01-598-7042. Verify interchangeability with system specifications before substitution.
Key specifications for STR60158C80: Width Across Flats: 0.313 INCHES NOMINAL IN; Head Height: 0.375 INCHES NOMINAL IN; Fastener Length: 5.750 INCHES NOMINAL IN; Shoulder Diameter: 0.005 INCHES NOMINAL OVERALL IN. 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.