The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-549-5177, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Jcb Inc.. Government technical data includes 14 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-549-5177 |
| Primary Part Number | 347/23911 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Jcb Inc. |
| Status | ACTIVE |
| Head Height | 0.203 INCHES NOMINAL IN |
| Fastener Length | 1.078 INCHES MINIMUM AND 1.391 INCHES MAXIMUM IN |
| Thread Length | 0.875 INCHES MINIMUM AND 1.188 INCHES MAXIMUM IN |
| Supplementary Features | MATERIAL IS GRADE 8 ALLOY STEEL |
| Hardness Rating | 33.0 ROCKWELL C MINIMUM AND 39.0 ROCKWELL C MAXIMUM OVERALL |
| Head Style | CROWNED HEXAGON |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 81343 - SAE J429 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION |
| Width Between Flats | 0.500 INCHES NOMINAL IN |
| Surface Treatment | CHROMATE ZINC OVERALL |
| Minimum Tensile Strength | 150 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5305-01-549-5177 is a Screw,cap,hexagon Head, manufactured by Jcb Inc., classified under FSC 5305, Screws. Status: active.
NSN 5305-01-549-5177 has 2 manufacturer part numbers on file: 347/23911 (Jcb Inc.), 92620A583 (Mcmaster-Carr Supply Co).
Key specifications for 347/23911: Head Height: 0.203 INCHES NOMINAL IN; Fastener Length: 1.078 INCHES MINIMUM AND 1.391 INCHES MAXIMUM IN; Thread Length: 0.875 INCHES MINIMUM AND 1.188 INCHES MAXIMUM IN; Supplementary Features: MATERIAL IS GRADE 8 ALLOY STEEL. 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.