The Screw,close Tolerance, cataloged under National Stock Number 5305-01-167-1091, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc. Government technical data includes 21 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-167-1091 |
| Primary Part Number | HT4053-5-3A |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Fastener Length | 0.704 INCHES MINIMUM AND 0.734 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-83488 TYPE 2 CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.506 INCHES MINIMUM AND 0.556 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 | 0.312 INCHES IN |
| Head Style | OVAL COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN |
| Grip Diameter | 0.3110 INCHES MINIMUM AND 0.3120 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 | 24 |
| Material | STEEL COMP 8740 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.469 INCHES MINIMUM AND 0.474 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 |
|---|---|
| HT4053-5-3A | Huck International, Inc (USA) |
| HT4053-5-3A PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4053-5-3A | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HT4053-5-3A PRIMARY | Hi-Shear Corporation (USA) |
| HT4053-5-3A | West Coast Aerospace, Inc. (USA) |
| HT4053-5-3A | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| Reference | Meaning |
|---|---|
| HT4053-5-3A | 5/9 Secondary reference U.S. Government activity |
| 642AS1623-1 | C/1 Advisory reference — outside the item-of-supply concept Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| HT4053-5-3A | 5/9 Secondary reference U.S. Government activity |
| HT4053-5-3A | 3/2 Design control — primary reference U.S. Government activity |
| ST3M740-5L3 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| ST3M740-5-3 | 5/9 Secondary reference The Boeing Company Div Defense |
| 10115507 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5305-01-167-1091 is a Screw,close Tolerance, manufactured by Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-167-1091 has 6 manufacturer part numbers on file: HT4053-5-3A (Huck International, Inc), HT4053-5-3A (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT4053-5-3A (Sps Technologies Ltd, Tj Brooks Division), HT4053-5-3A (Hi-Shear Corporation), HT4053-5-3A (West Coast Aerospace, Inc.) and 1 more.
Key specifications for HT4053-5-3A: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Fastener Length: 0.704 INCHES MINIMUM AND 0.734 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-C-83488 TYPE 2 CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL. 21 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.