The Screw,machine, cataloged under National Stock Number 5305-01-397-6495, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Communications & Power Industries Llc Div Microwave Power Products Division. Government technical data includes 13 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 | 5305-01-397-6495 |
| Primary Part Number | 12-900-321-00 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Communications & Power Industries Llc Div Microwave Power Products Division |
| Status | ACTIVE |
| Fastener Length | 0.250 INCHES NOMINAL IN |
| Screw Material Document and Classification | FED 18-8 FED STD ALL MATERIAL RESPONSES |
| Thread Length | 0.174 INCHES MINIMUM AND 0.224 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 40 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.096 INCHES MINIMUM AND 0.119 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 |
|---|---|
| 12-900-321-00 PRIMARY | Communications & Power Industries Llc Div Microwave Power Products Division (USA) |
NSN 5305-01-397-6495 is a Screw,machine, manufactured by Communications & Power Industries Llc Div Microwave Power Products Division, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-397-6495 has 1 manufacturer part number on file: 12-900-321-00 (Communications & Power Industries Llc Div Microwave Power Products Division).
Key specifications for 12-900-321-00: Fastener Length: 0.250 INCHES NOMINAL IN; Screw Material Document and Classification: FED 18-8 FED STD ALL MATERIAL RESPONSES; Thread Length: 0.174 INCHES MINIMUM AND 0.224 INCHES MAXIMUM IN; Nominal Thread Diameter: 0.112 INCHES IN. 13 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.