The Screw,machine, cataloged under National Stock Number 5305-01-697-0537, 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 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-697-0537 |
| Primary Part Number | NAS1790-3-4X |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Head Height | 0.573 INCHES MINIMUM AND 0.603 INCHES MAXIMUM IN |
| Fastener Length | 0.573 INCHES MINIMUM AND 0.603 INCHES MAXIMUM IN |
| Screw Material Document and Classification | AMS 6382 ASSN STD 1ST MATERIAL RESPONSE OR AMS 6415 OR 6484 ASSN STD 2ND MATERIAL RESPONSE OR AMS 6322,6325 OR 6327 ASSN STD 3RD MATERIAL RESPONSE |
| Thread Length | 0.338 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.1900 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NAS1790 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Screw Material | STEEL COMP 4140 OR STEEL COMP 4340 OR STEEL COMP 8740 |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.381 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 |
|---|---|
| NAS1790-3-4X | Howmet Global Fastening Systems Inc (USA) |
| NAS1790-3-4X | Federal Manufacturing Corp (USA) |
| NAS1790-3-4X | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| NAS1790-3-4X | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| NAS1790-3-4X | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| NAS1790-3-4X | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| NAS1790-3-4X | Huck International, Inc (USA) |
| Reference | Meaning |
|---|---|
| NAS1790-3-4X | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-697-0537 is a Screw,machine, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-697-0537 has 7 manufacturer part numbers on file: NAS1790-3-4X (Howmet Global Fastening Systems Inc), NAS1790-3-4X (Federal Manufacturing Corp), NAS1790-3-4X (Howmet Global Fastening Systems Inc Div City of Industry Operations), NAS1790-3-4X (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok), NAS1790-3-4X (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company) and 2 more.
Key specifications for NAS1790-3-4X: Head Height: 0.573 INCHES MINIMUM AND 0.603 INCHES MAXIMUM IN; Fastener Length: 0.573 INCHES MINIMUM AND 0.603 INCHES MAXIMUM IN; Screw Material Document and Classification: AMS 6382 ASSN STD 1ST MATERIAL RESPONSE OR AMS 6415 OR 6484 ASSN STD 2ND MATERIAL RESPONSE OR AMS 6322,6325 OR 6327 ASSN STD 3RD MATERIAL RESPONSE; Thread Length: 0.338 INCHES NOMINAL 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.