The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-656-3994, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Big Bolt, Llc. Government technical data includes 13 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 | 5305-01-656-3994 |
| Primary Part Number | TAPG8ZYDOM1213412 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Big Bolt, Llc |
| Status | ACTIVE |
| Head Height | 0.344 INCHES NOMINAL IN |
| Fastener Length | 4.500 INCHES NOMINAL IN |
| Thread Length | 4.500 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.750 INCHES NOMINAL IN |
| Color | YELLOW OVERALL |
| Surface Treatment | ZINC AND CHROMATE OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 13 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 92620A728 | Mcmaster-Carr Supply Co (USA) |
| TAPG8ZYDOM1213412 PRIMARY | Big Bolt, Llc (USA) |
NSN 5305-01-656-3994 is a Screw,cap,hexagon Head, manufactured by Big Bolt, Llc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-656-3994 has 2 manufacturer part numbers on file: 92620A728 (Mcmaster-Carr Supply Co), TAPG8ZYDOM1213412 (Big Bolt, Llc).
Key specifications for TAPG8ZYDOM1213412: Head Height: 0.344 INCHES NOMINAL IN; Fastener Length: 4.500 INCHES NOMINAL IN; Thread Length: 4.500 INCHES NOMINAL IN; Nominal Thread Diameter: 0.500 INCHES IN. 13 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.