The Screw,close Tolerance, cataloged under National Stock Number 5305-01-694-7456, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 12 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-694-7456 |
| Primary Part Number | NAS1790V4-6Y |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES OVERALL |
| Head Height | 0.111 INCHES NOMINAL IN |
| Fastener Length | 0.785 INCHES MINIMUM AND 0.815 INCHES MAXIMUM IN |
| Thread Length | 0.425 INCHES NOMINAL IN |
| Material Document and Classification | AMS4928 OR AMS4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.2500 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NAS1790 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Grip Length | 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN |
| Grip Diameter | 0.2802 INCHES MINIMUM AND 0.2807 INCHES MAXIMUM IN |
| 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 | 28 |
| Material | TITANIUM ALLOY UNS R56400 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.464 INCHES MINIMUM AND 0.506 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 |
|---|---|
| NAS1790V4-6Y | Hi-Shear Corporation (USA) |
| NAS1790V4-6Y | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| NAS1790V4-6Y | Federal Manufacturing Corp (USA) |
| NAS1790V4-6Y | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| NAS1790V4-6Y | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| NAS1790V4-6Y | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| NAS1790V4-6Y | West Coast Aerospace, Inc. (USA) |
| NAS1790V4-6Y | Huck International, Inc (USA) |
| NAS1790V4-6Y | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| NAS1790V4-6Y | Howmet Global Fastening Systems Inc (USA) |
| NAS1790V4-6Y | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| NAS1790V4-6Y | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| NAS1790V4-6Y | 3/9 Design control — primary reference U.S. Government activity |
| NAS1790V4-6Y | 3/2 Design control — primary reference U.S. Government activity |
| NAS1790V4-6Y | 5/9 Secondary reference Voi-Shan/chatsworth Div of Vsi Corp Sub of Fairchild Industries Inc |
NSN 5305-01-694-7456 is a Screw,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-694-7456 has 12 manufacturer part numbers on file: NAS1790V4-6Y (Hi-Shear Corporation), NAS1790V4-6Y (Valley-Todeco, Inc. Dba Arconic Fastening Systems), NAS1790V4-6Y (Federal Manufacturing Corp), NAS1790V4-6Y (Howmet Global Fastening Systems Inc Div City of Industry Operations), NAS1790V4-6Y (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok) and 7 more.
Key specifications for NAS1790V4-6Y: Surface Finish: 32.0 MICROINCHES OVERALL; Head Height: 0.111 INCHES NOMINAL IN; Fastener Length: 0.785 INCHES MINIMUM AND 0.815 INCHES MAXIMUM IN; Thread Length: 0.425 INCHES NOMINAL IN. 19 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.