The Screw,close Tolerance, cataloged under National Stock Number 5305-01-406-8668, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Huck International, Inc. Government technical data includes 15 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through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-406-8668 |
| Primary Part Number | H044-4-9R |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Fastener Length | 0.917 INCHES MINIMUM AND 0.947 INCHES MAXIMUM IN |
| Thread Length | 0.345 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN |
| Hardness Rating | 46.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 81755-C7984-4-10R PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION |
| Grip Length | 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN |
| Grip Diameter | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Internal Drive Style | OFFSET CRUCIFORM (TORQUE SET) |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP H11 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| VT1693F4-9X | Howmet Global Fastening Systems Inc (USA) |
| H044-4-9R PRIMARY | Huck International, Inc (USA) |
| 121557-4-A9PX | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| C7984-4-9R | 5/9 Secondary reference Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| C7984-4-9R | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| C7984-4-9R | 5/9 Secondary reference U.S. Government activity |
| C7984-4-9R | 5/9 Secondary reference Huck International, Inc |
| C7984-4-9R | 5/9 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| VT1693F4-9X | 3/2 Design control — primary reference U.S. Government activity |
| C7984-4-9R | 7/2 Vendor item drawing reference U.S. Government activity |
| C7984-4-9R | 5/9 Secondary reference U.S. Government activity |
| 121557-4-A9PX | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-406-8668 is a Screw,close Tolerance, manufactured by Huck International, Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-406-8668 has 3 manufacturer part numbers on file: VT1693F4-9X (Howmet Global Fastening Systems Inc), H044-4-9R (Huck International, Inc), 121557-4-A9PX (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for H044-4-9R: Fastener Length: 0.917 INCHES MINIMUM AND 0.947 INCHES MAXIMUM IN; Thread Length: 0.345 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN; Hardness Rating: 46.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM OVERALL; Nominal Thread Diameter: 0.250 INCHES IN. 15 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.