The Screw,machine, cataloged under National Stock Number 5305-01-605-5591, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Symmons Industries Inc. Government technical data includes 6 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 | 5305-01-605-5591 |
| Primary Part Number | HP-18 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Symmons Industries Inc |
| Status | ACTIVE |
| Fastener Length | 0.25 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.1380 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Thread Quantity Per Inch | 32 |
| 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 |
|---|---|
| HP-18 PRIMARY | Symmons Industries Inc (USA) |
NSN 5305-01-605-5591 is a Screw,machine, manufactured by Symmons Industries Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-605-5591 has 1 manufacturer part number on file: HP-18 (Symmons Industries Inc).
Key specifications for HP-18: Fastener Length: 0.25 INCHES NOMINAL IN; Nominal Thread Diameter: 0.1380 INCHES IN; Head Style: HEXAGON; Thread Direction: RIGHT-HAND. 6 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.