The Screw,machine, cataloged under National Stock Number 5305-01-421-8399, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-421-8399 |
| Primary Part Number | SC5064-04-6 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Bearing Surface of Head Surface Finish | 63.0 MICROINCHES |
| Fastener Length | 0.320 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN |
| Screw Material Document and Classification | AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 4957 ASSN STD SINGLE MATERIAL RESPONSE |
| Thread Length | 0.330 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Thread Surface Finish | 32.0 MICROINCHES |
| Screw Material | TITANIUM ALLOY UNS R56400 |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | CROSS RECESS TYPE III |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 40 |
| Thread Series Designator | UNJC |
| Head Diameter | 0.193 INCHES MINIMUM AND 0.226 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 |
|---|---|
| SC5064-04-6 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| AIC1198-04-6 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| 111407-04-6 | 3/2 Design control — primary reference U.S. Government activity |
| 3D0068-04-6 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-421-8399 is a Screw,machine, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-421-8399 has 2 manufacturer part numbers on file: SC5064-04-6 (Howmet Global Fastening Systems Inc), AIC1198-04-6 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company).
Key specifications for SC5064-04-6: Bearing Surface of Head Surface Finish: 63.0 MICROINCHES; Fastener Length: 0.320 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN; Screw Material Document and Classification: AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 4957 ASSN STD SINGLE MATERIAL RESPONSE; Thread Length: 0.330 INCHES MAXIMUM IN. 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.