The Screw,close Tolerance, cataloged under National Stock Number 5305-01-243-9856, 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 22 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-243-9856 |
| Primary Part Number | HT4053-4-14A |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Fastener Length | 1.329 INCHES MINIMUM AND 1.359 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-83488,TYPE 2,CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.444 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN |
| Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | MIL-S-6049 MIL SPEC 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 | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 180000 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 | STEEL COMP 8740 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.3898 INCHES MINIMUM AND 0.3948 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 |
|---|---|
| HT4053-4-14A PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| HT4053-4-14A PRIMARY | Hi-Shear Corporation (USA) |
| HT4053-4-14A PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4053-4-14A PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4053-4-14A PRIMARY | West Coast Aerospace, Inc. (USA) |
| HT4053-4-14A PRIMARY | Huck International, Inc (USA) |
| Reference | Meaning |
|---|---|
| HT4053-4-14A | 3/2 Design control — primary reference U.S. Government activity |
| HT4053-4-14A | 5/9 Secondary reference Sps Technologies Inc |
| 10113580 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| HT4053-4-14A | 5/9 Secondary reference U.S. Government activity |
| HT4053-4-14A | 3/2 Design control — primary reference U.S. Government activity |
| ST3M740-4L14 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
NSN 5305-01-243-9856 is a Screw,close Tolerance, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-243-9856 has 6 manufacturer part numbers on file: HT4053-4-14A (Howmet Global Fastening Systems Inc), HT4053-4-14A (Hi-Shear Corporation), HT4053-4-14A (Fastener Innovation Technology, Inc. Dba F I T), HT4053-4-14A (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT4053-4-14A (West Coast Aerospace, Inc.) and 1 more.
Key specifications for HT4053-4-14A: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Fastener Length: 1.329 INCHES MINIMUM AND 1.359 INCHES MAXIMUM IN. 22 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.