The Screw,close Tolerance, cataloged under National Stock Number 5305-00-034-1600, 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 6 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-034-1600 |
| Primary Part Number | GB510L3-40D |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| Grip Length | 2.490 INCHES MINIMUM AND 2.510 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Quantity Per Inch | 32 |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 2.649 INCHES MINIMUM AND 2.669 INCHES MAXIMUM FIRST HOLE 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 |
|---|---|
| GB510L3-40D PRIMARY | Huck International, Inc (USA) |
| GB510L3-40D PRIMARY | Hi-Shear Corporation (USA) |
| GB510L3-40D | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| Reference | Meaning |
|---|---|
| GB510L3-40D | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
| 106750-3-400 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| HT8043-3-40T | 5/9 Secondary reference U.S. Government activity |
| HT8043-3-40T | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| HT239PB3-40D | 5/9 Secondary reference Hi-Shear Corporation |
| GB510L3-40D | 3/2 Design control — primary reference U.S. Government activity |
| GB510L3-40D | 3/2 Design control — primary reference U.S. Government activity |
| 106750-3-40D | 5/9 Secondary reference U.S. Government activity |
NSN 5305-00-034-1600 is a Screw,close Tolerance, manufactured by Huck International, Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-034-1600 has 3 manufacturer part numbers on file: GB510L3-40D (Huck International, Inc), GB510L3-40D (Hi-Shear Corporation), GB510L3-40D (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc).
Key specifications for GB510L3-40D: Hardness Rating: 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL; Grip Length: 2.490 INCHES MINIMUM AND 2.510 INCHES MAXIMUM IN; Minimum Tensile Strength: 160000 POUNDS PER SQUARE INCH LBS; Countersink Angle: 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM. 6 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.