The Screw,machine, cataloged under National Stock Number 5305-00-126-7643, 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 14 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through both NSN and commercial part number lookups. 13 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-126-7643 |
| Primary Part Number | HT260LB08-22 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Fastener Length | 1.691 INCHES MINIMUM AND 1.721 INCHES MAXIMUM IN |
| Thread Length | 0.306 INCHES MINIMUM AND 0.356 INCHES MAXIMUM IN |
| Shank Surface Finish | 63.0 MICROINCHES |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Screw Material | TITANIUM ALLOY |
| 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 | 32 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.277 INCHES MINIMUM AND 0.332 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 |
|---|---|
| GB510CH08-V22 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| HT260LB08-22 PRIMARY | Hi-Shear Corporation (USA) |
| HT260LB08-22 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| Reference | Meaning |
|---|---|
| 66584-08-22 | 5/9 Secondary reference Sps Technologies Inc |
| BM19024-08-22 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| GB510CH08-V22 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| GB510CH08-V22 | 5/9 Secondary reference Aero Mechanical Fastening Systems Inc |
| T150-08-22 | 5/9 Secondary reference U.S. Government activity |
| HT8100-08-22 | 5/9 Secondary reference U.S. Government activity |
| BM19024-08-22 | 5/9 Secondary reference U.S. Government activity |
| 66584-08-22 | 3/2 Design control — primary reference U.S. Government activity |
| GB510CH08V22 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
| 66584-08-22 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| GB510F08-22 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| T150-08-22 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| HT8100-08-22 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
NSN 5305-00-126-7643 is a Screw,machine, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-126-7643 has 3 manufacturer part numbers on file: GB510CH08-V22 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), HT260LB08-22 (Hi-Shear Corporation), HT260LB08-22 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc).
Key specifications for HT260LB08-22: Fastener Length: 1.691 INCHES MINIMUM AND 1.721 INCHES MAXIMUM IN; Thread Length: 0.306 INCHES MINIMUM AND 0.356 INCHES MAXIMUM IN; Shank Surface Finish: 63.0 MICROINCHES; Nominal Thread Diameter: 0.164 INCHES IN. 14 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.