The Screw,close Tolerance, cataloged under National Stock Number 5305-01-044-7113, 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 17 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-044-7113 |
| Primary Part Number | HT260LB-3-18 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES GRIP |
| Fastener Length | 1.448 INCHES MINIMUM AND 1.478 INCHES MAXIMUM IN |
| Thread Length | 0.313 INCHES MINIMUM AND 0.363 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 26512-GB510F PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Grip Length | 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM IN |
| Grip Diameter | 0.1885 INCHES MINIMUM AND 0.1895 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 | 32 |
| Material | TITANIUM ALLOY UNS R54520 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.325 INCHES MINIMUM AND 0.387 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 |
|---|---|
| HT260LB-3-18 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT260LB-3-18 PRIMARY | Hi-Shear Corporation (USA) |
| GB510CH3V18 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| BM19024-3-18 | 5/9 Secondary reference U.S. Government activity |
| 66584-3-18 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| T150-3-18 | 5/9 Secondary reference U.S. Government activity |
| BM19024-3-18 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| GB510F3-18 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
| HT8100-3-18 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| T150-3-18 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| 66584-3-18 | 3/2 Design control — primary reference U.S. Government activity |
| HT8100-3-18 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-044-7113 is a Screw,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-044-7113 has 3 manufacturer part numbers on file: HT260LB-3-18 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT260LB-3-18 (Hi-Shear Corporation), GB510CH3V18 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners).
Key specifications for HT260LB-3-18: Surface Finish: 63.0 MICROINCHES GRIP; Fastener Length: 1.448 INCHES MINIMUM AND 1.478 INCHES MAXIMUM IN; Thread Length: 0.313 INCHES MINIMUM AND 0.363 INCHES MAXIMUM IN; Nominal Thread Diameter: 0.190 INCHES IN. 17 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.