The Setscrew, cataloged under National Stock Number 5305-01-412-6054, 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 16 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-412-6054 |
| Primary Part Number | 801-6408784-81 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Width Across Flats | 0.219 INCHES NOMINAL IN |
| Fastener Length | 0.490 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Thread Length | 0.500 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-B-626 FED SPEC 1ST MATERIAL RESPONSE OR QQ-W-321 FED SPEC 1ST MATERIAL RESPONSE OR QQ-B-626 FED SPEC 2ND MATERIAL RESPONSE OR QQ-W-321 FED SPEC 3RD MATERIAL RESPONSE OR QQ-W-321 FED SPEC 4TH MATERIAL RESPONSE FASTENER |
| Nominal Thread Diameter | 0.438 INCHES IN |
| Head Style | HEADLESS (SETSCREW) |
| Thread Direction | RIGHT-HAND |
| Point Style | FLAT |
| Nondefinitive Spec/std Data | 1 TYPE OR 1 STYLE |
| Locking Feature | PATCH OR PELLET OR STRIP THREADS |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 14 |
| Material | PLASTIC POLYAMIDE NYLON LOCKING FEATURE |
| Material | COPPER ALLOY 260 OR COPPER ALLOY 268 OR COPPER ALLOY 270 OR COPPER ALLOY 274 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 |
|---|---|
| 801-6408784-81 PRIMARY | Naval Sea Systems Command (USA) |
| 801-6408784 FIND 81 PRIMARY | Naval Sea Systems Command (USA) |
| 211057024 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| FF-S-200 | 4/1 Identification reference U.S. Government activity |
NSN 5305-01-412-6054 is a Setscrew, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-412-6054 has 3 manufacturer part numbers on file: 801-6408784-81 (Naval Sea Systems Command), 801-6408784 FIND 81 (Naval Sea Systems Command), 211057024 (Naval Sea Systems Command).
Key specifications for 801-6408784-81: Width Across Flats: 0.219 INCHES NOMINAL IN; Fastener Length: 0.490 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN; Thread Length: 0.500 INCHES MAXIMUM IN; Material Document and Classification: QQ-B-626 FED SPEC 1ST MATERIAL RESPONSE OR QQ-W-321 FED SPEC 1ST MATERIAL RESPONSE OR QQ-B-626 FED SPEC 2ND MATERIAL RESPONSE OR QQ-W-321 FED SPEC 3RD MATERIAL RESPONSE OR QQ-W-321 FED SPEC 4TH MATERIAL RESPONSE FASTENER. 16 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.