The Screw,close Tolerance, cataloged under National Stock Number 5305-00-047-2426, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 11 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-047-2426 |
| Primary Part Number | GB510L5-6 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES GRIP |
| Surface Finish | 63.0 MICROINCHES THREADS |
| Nominal Thread Diameter | 0.3125 INCHES IN |
| Grip Length | 0.734 INCHES MINIMUM AND 0.781 INCHES MAXIMUM IN |
| Grip Diameter | 0.3110 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| 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 |
| Material | STEEL COMP 4140 OR STEEL COMP E4340 OR STEEL COMP 6150 OR STEEL COMP 8735 OR STEEL COMP 8740 OVERALL |
| Head Diameter | 0.442 INCHES MINIMUM AND 0.473 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 |
|---|---|
| BM19025-56 | Huck International, Inc (USA) |
| HT239PB5-6 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| A147-5-6 | Huck International, Inc (USA) |
| HT8043-5-6 | Howmet Global Fastening Systems Inc (USA) |
| HT239PB5-6 | Hi-Shear Corporation (USA) |
| GB510L5-6 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| HT8043-5-6 | 5/9 Secondary reference U.S. Government activity |
| 106750-5-6 | 5/2 Secondary reference U.S. Government activity |
NSN 5305-00-047-2426 is a Screw,close Tolerance, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-047-2426 has 6 manufacturer part numbers on file: BM19025-56 (Huck International, Inc), HT239PB5-6 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), A147-5-6 (Huck International, Inc), HT8043-5-6 (Howmet Global Fastening Systems Inc), HT239PB5-6 (Hi-Shear Corporation) and 1 more.
1 possible match (shared part number, not a government interchangeability claim): 5999-00-258-3052. Verify interchangeability with system specifications before substitution.
Key specifications for GB510L5-6: Surface Finish: 63.0 MICROINCHES GRIP; Surface Finish: 63.0 MICROINCHES THREADS; Nominal Thread Diameter: 0.3125 INCHES IN; Grip Length: 0.734 INCHES MINIMUM AND 0.781 INCHES MAXIMUM IN. 11 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.