The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-368-5645, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-368-5645 |
| Primary Part Number | 53A-00-193-4 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Head Height | 0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN |
| Fastener Length | 1.500 INCHES NOMINAL IN |
| Thread Length | 1.375 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-N-281 CLA FED SPEC SINGLE MATERIAL RESPONSE FASTENER |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Features Provided | CASEHARDENED |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN |
| Locking Feature | STRIP THREADS |
| Minimum Tensile Strength | 80000 POUNDS PER SQUARE INCH LBS |
| Minimum Yield Strength | 40000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 16 |
| Material | PLASTIC POLYAMIDE NYLON LOCKING FEATURE |
| Material | NICKEL ALLOY 400 FASTENER |
| 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 |
|---|---|
| 53A-00-193-4 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 53A-00-193-4 | 5/9 Secondary reference Illinois Tool Wks Inc Linac Div |
NSN 5305-01-368-5645 is a Screw,cap,hexagon Head, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-368-5645 has 1 manufacturer part number on file: 53A-00-193-4 (Naval Sea Systems Command).
Key specifications for 53A-00-193-4: Head Height: 0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN; Fastener Length: 1.500 INCHES NOMINAL IN; Thread Length: 1.375 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN; Material Document and Classification: QQ-N-281 CLA FED SPEC SINGLE MATERIAL RESPONSE FASTENER. 17 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.