The Setscrew, cataloged under National Stock Number 5305-01-541-7554, 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 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-541-7554 |
| Primary Part Number | 4385049 ITEM 79 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Point Length | 0.150 INCHES NOMINAL IN |
| Fastener Length | 0.375 INCHES NOMINAL IN |
| Material Document and Classification | QQ-N-281, CL A,FF-S-200, TY 1 AND 2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Point Chamfer Angle | 135.0 DEGREES NOMINAL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEADLESS (SETSCREW) |
| Thread Direction | RIGHT-HAND |
| Point Style | CONE |
| Internal Drive Style | W/O INTERNAL DRIVE |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | NICKEL ALLOY OVERALL |
| 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 |
|---|---|
| 4385049 ITEM 79 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 4385049 ITEM 79 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-541-7554 is a Setscrew, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-541-7554 has 1 manufacturer part number on file: 4385049 ITEM 79 (Naval Sea Systems Command).
Key specifications for 4385049 ITEM 79: Point Length: 0.150 INCHES NOMINAL IN; Fastener Length: 0.375 INCHES NOMINAL IN; Material Document and Classification: QQ-N-281, CL A,FF-S-200, TY 1 AND 2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Point Chamfer Angle: 135.0 DEGREES NOMINAL. 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.