The Screw,close Tolerance, cataloged under National Stock Number 5305-01-406-8667, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-406-8667 |
| Primary Part Number | AIC984-4-5R |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| Status | ACTIVE |
| Fastener Length | 0.667 INCHES MINIMUM AND 0.697 INCHES MAXIMUM IN |
| Thread Length | 0.370 INCHES NOMINAL IN |
| Hardness Rating | 46.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 81755-C7984-4-5R PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION |
| Grip Length | 0.302 INCHES MINIMUM AND 0.322 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 | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.447 INCHES MINIMUM AND 0.507 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 |
|---|---|
| AIC984-4-5R PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| VT1693F4-5X | Howmet Global Fastening Systems Inc (USA) |
| H044-4-5R PRIMARY | Huck International, Inc (USA) |
| 121557-4-A5PX | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| C7984-4-5R | 5/9 Secondary reference U.S. Government activity |
| C7984-4-5R | 5/9 Secondary reference Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| C7984-4-5R | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| C7984-4-5R | 5/9 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| C7984-4-5R | 7/2 Vendor item drawing reference U.S. Government activity |
| C7984-4-5R | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| C7984-4-5R | 5/9 Secondary reference U.S. Government activity |
| VT1693F4-5X | 3/2 Design control — primary reference U.S. Government activity |
| 121557-4-A5PX | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-406-8667 is a Screw,close Tolerance, manufactured by Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-406-8667 has 4 manufacturer part numbers on file: AIC984-4-5R (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), VT1693F4-5X (Howmet Global Fastening Systems Inc), H044-4-5R (Huck International, Inc), 121557-4-A5PX (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for AIC984-4-5R: Fastener Length: 0.667 INCHES MINIMUM AND 0.697 INCHES MAXIMUM IN; Thread Length: 0.370 INCHES NOMINAL IN; Hardness Rating: 46.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM OVERALL; Nominal Thread Diameter: 0.250 INCHES IN. 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.