The Screw,close Tolerance, cataloged under National Stock Number 5305-01-042-6318, 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 19 specifications, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-042-6318 |
| Primary Part Number | T151-4D3 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES GRIP |
| Surface Finish | 63.0 MICROINCHES BEARING SURFACE OF HEAD |
| Head Height | 0.162 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN |
| Hole Configuration Style | ROUND LONGITUDINAL HOLE |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | PAN |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 26512-GB511J PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Grip Length | 0.188 INCHES NOMINAL IN |
| Grip Diameter | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HIGH-TORQUE |
| Thread Quantity Per Inch | 28 |
| Material | TITANIUM ALLOY UNS R54520 OVERALL |
| Hole Quantity | 2 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Hole Type | DRILLED |
| Hole Diameter | 0.037 INCHES NOMINAL IN |
| Head Diameter | 0.473 INCHES MINIMUM AND 0.492 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 |
|---|---|
| T151-4D3 PRIMARY | Huck International, Inc (USA) |
| HT193LB4H3 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| BM21009-4H3 | Huck International, Inc (USA) |
| HT193LB4H3 | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| GB511J4D3 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
| 67077D4-3 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| 67077D4-3 | 3/2 Design control — primary reference U.S. Government activity |
| BM21009-4H3 | 5/9 Secondary reference U.S. Government activity |
| HT8099-4D3 | 5/2 Secondary reference U.S. Government activity |
| T151-4D3 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-042-6318 is a Screw,close Tolerance, manufactured by Huck International, Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-042-6318 has 4 manufacturer part numbers on file: T151-4D3 (Huck International, Inc), HT193LB4H3 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), BM21009-4H3 (Huck International, Inc), HT193LB4H3 (Hi-Shear Corporation).
Key specifications for T151-4D3: Surface Finish: 63.0 MICROINCHES GRIP; Surface Finish: 63.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.162 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN; Hole Configuration Style: ROUND LONGITUDINAL HOLE. 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.