The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-256-5789, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Alta Products Co Inc. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-256-5789 |
| Primary Part Number | 38031-92C-6B |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Alta Products Co Inc |
| Status | ACTIVE |
| Width Across Flats | 0.040 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN |
| Head Height | 0.038 INCHES MINIMUM AND 0.046 INCHES MAXIMUM IN |
| Fastener Length | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416 TYPE 11,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.086 INCHES IN |
| Head Style | MODIFIED PAN |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 64 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.154 INCHES MINIMUM AND 0.164 INCHES MAXIMUM 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 |
|---|---|
| 38031-92C-6B PRIMARY | Alta Products Co Inc (USA) |
NSN 5305-01-256-5789 is a Screw,cap,socket Head, manufactured by Alta Products Co Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-256-5789 has 1 manufacturer part number on file: 38031-92C-6B (Alta Products Co Inc).
Key specifications for 38031-92C-6B: Width Across Flats: 0.040 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN; Head Height: 0.038 INCHES MINIMUM AND 0.046 INCHES MAXIMUM IN; Fastener Length: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416 TYPE 11,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 16 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.