The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-174-2891, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-174-2891 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 3.85 MILLIMETERS MINIMUM AND 4.15 MILLIMETERS MAXIMUM MM |
| Fastener Length | 24.60 MILLIMETERS MINIMUM AND 25.40 MILLIMETERS MAXIMUM MM |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2 CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Pitch in Millimeters | 1.0 |
| Thread Length | 22.6 MILLIMETERS MINIMUM AND 25.4 MILLIMETERS MAXIMUM MM |
| Nominal Thread Diameter | 6.0 MILLIMETERS MM |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 9.73 MILLIMETERS MINIMUM AND 10.00 MILLIMETERS MAXIMUM MM |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Material | STEEL 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 |
| Reference | Meaning |
|---|---|
| B18231A06025N | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-174-2891 is a Screw,cap,hexagon Head, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-174-2891: Head Height: 3.85 MILLIMETERS MINIMUM AND 4.15 MILLIMETERS MAXIMUM MM; Fastener Length: 24.60 MILLIMETERS MINIMUM AND 25.40 MILLIMETERS MAXIMUM MM; Surface Treatment Document and Classification: QQ-P-416,TYPE 2 CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Pitch in Millimeters: 1.0. 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.