The Screw,close Tolerance, cataloged under National Stock Number 5305-01-050-4993, 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 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-050-4993 |
| Primary Part Number | HT4028L7-11M |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES TOP OF HEAD |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Fastener Length | 1.329 INCHES MINIMUM AND 1.359 INCHES MAXIMUM IN |
| Thread Length | 0.631 INCHES MINIMUM AND 0.681 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.438 INCHES IN |
| Head Style | OVAL COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 76301-ST3-466 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Grip Length | 0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN |
| Grip Diameter | 0.4365 INCHES MINIMUM AND 0.4370 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | TITANIUM ALLOY OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.662 INCHES MINIMUM AND 0.668 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 |
|---|---|
| HT4028L7-11M PRIMARY | Hi-Shear Corporation (USA) |
| HT4028L7-11M PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 11909V7L11M1 | Reid Products Inc. Dba Reid Products Inc (USA) |
| HT4028L7-11M PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| ST3M466V7L11M1 | Huck International, Inc (USA) |
| Reference | Meaning |
|---|---|
| HT4028L7-11M | 5/9 Secondary reference U.S. Government activity |
| ST3M466V7L11M1 | 5/9 Secondary reference The Boeing Company Div Defense |
| HT4028L7-11M | 3/2 Design control — primary reference U.S. Government activity |
| HT4028L7-11M | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-050-4993 is a Screw,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-050-4993 has 5 manufacturer part numbers on file: HT4028L7-11M (Hi-Shear Corporation), HT4028L7-11M (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), 11909V7L11M1 (Reid Products Inc. Dba Reid Products Inc), HT4028L7-11M (Howmet Global Fastening Systems Inc), ST3M466V7L11M1 (Huck International, Inc).
Key specifications for HT4028L7-11M: Surface Finish: 32.0 MICROINCHES TOP OF HEAD; Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Fastener Length: 1.329 INCHES MINIMUM AND 1.359 INCHES MAXIMUM 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.