The Screw,tapping, cataloged under National Stock Number 5305-01-236-1591, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Dressta North America Ltd. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-236-1591 |
| Primary Part Number | 171734 |
| Item Name | Screw,tapping |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Dressta North America Ltd |
| Status | ACTIVE |
| Nonmachine Nominal Thread Diameter | 0.190 INCHES IN |
| Head Height | 0.099 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN |
| Fastener Length | 0.625 INCHES NOMINAL IN |
| Nonmachine Thread Style | THRU SLOT (TYPE D) |
| Head Style | DOUBLE CHAMFER |
| Surface Treatment | ZINC AND CHROMATE OVERALL |
| Internal Drive Style | SLOT |
| Material | STEEL OVERALL |
| Head Diameter | 0.357 INCHES MINIMUM AND 0.373 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 |
NSN 5305-01-236-1591 is a Screw,tapping, manufactured by Dressta North America Ltd, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-236-1591 has 2 manufacturer part numbers on file: 171734 (Dressta North America Ltd), 171734 (Komatsu America Corp.).
Key specifications for 171734: Nonmachine Nominal Thread Diameter: 0.190 INCHES IN; Head Height: 0.099 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN; Fastener Length: 0.625 INCHES NOMINAL IN; Nonmachine Thread Style: THRU SLOT (TYPE D). 9 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.