The Screw,close Tolerance, cataloged under National Stock Number 5305-00-357-1866, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Huck International, Inc. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-357-1866 |
| Primary Part Number | HT4028L4-14 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| 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 | 0.444 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | OVAL COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.865 INCHES MINIMUM AND 0.885 INCHES MAXIMUM IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.2495 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 OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.389 INCHES MINIMUM AND 0.394 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 |
|---|---|
| HT4028L4-14 PRIMARY | Huck International, Inc (USA) |
| HT4028L4-14 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4028L4-14 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| 11909V4L14-1 | Reid Products Inc. Dba Reid Products Inc (USA) |
| HT4028L4-14 PRIMARY | Hi-Shear Corporation (USA) |
| ST3M466V4L14-1 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| Reference | Meaning |
|---|---|
| ST3M466V4L14-1 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| HT4028L4-14 | 5/9 Secondary reference U.S. Government activity |
| HT4028L4-14 | 5/9 Secondary reference U.S. Government activity |
| ST3M466V4L14-1 | 5/9 Secondary reference U.S. Government activity |
| HT4028L4-14 | C/1 Advisory reference — outside the item-of-supply concept Sps Technologies, Llc Dba PB Fasteners |
| HT4028L4-14 | 5/9 Secondary reference U.S. Government activity |
| HT4028L4-14 | 5/9 Secondary reference Sps Technologies Inc |
NSN 5305-00-357-1866 is a Screw,close Tolerance, manufactured by Huck International, Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-357-1866 has 6 manufacturer part numbers on file: HT4028L4-14 (Huck International, Inc), HT4028L4-14 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT4028L4-14 (Howmet Global Fastening Systems Inc), 11909V4L14-1 (Reid Products Inc. Dba Reid Products Inc), HT4028L4-14 (Hi-Shear Corporation) and 1 more.
Key specifications for HT4028L4-14: 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: 0.444 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN. 18 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.