The Screw,machine, cataloged under National Stock Number 5305-01-121-8392, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Ashcroft Inc Dba Heise. Government technical data includes 14 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 | 5305-01-121-8392 |
| Primary Part Number | SMSF-9 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Ashcroft Inc Dba Heise |
| Status | ACTIVE |
| Screw Surface Treatment | OXIDE |
| Fastener Length | 0.500 INCHES NOMINAL IN |
| Thread Length | 0.383 INCHES MINIMUM AND 0.433 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL CORROSION RESISTING |
| Color | BLACK |
| Internal Drive Style | SLOT |
| Countersink Angle | 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 40 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.195 INCHES MINIMUM AND 0.225 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 |
|---|---|
| SMSF-9 PRIMARY | Ashcroft Inc Dba Heise (USA) |
NSN 5305-01-121-8392 is a Screw,machine, manufactured by Ashcroft Inc Dba Heise, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-121-8392 has 1 manufacturer part number on file: SMSF-9 (Ashcroft Inc Dba Heise).
Key specifications for SMSF-9: Screw Surface Treatment: OXIDE; Fastener Length: 0.500 INCHES NOMINAL IN; Thread Length: 0.383 INCHES MINIMUM AND 0.433 INCHES MAXIMUM IN; Nominal Thread Diameter: 0.112 INCHES IN. 14 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.