The Screw,close Tolerance, cataloged under National Stock Number 5305-01-133-3879, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc. Government technical data includes 21 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-133-3879 |
| Primary Part Number | GB510DE410D |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| Status | ACTIVE |
| Fastener Length | 0.986 INCHES MINIMUM AND 1.033 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-8837 TYPE 2 CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.351 INCHES MINIMUM AND 0.418 INCHES MAXIMUM IN |
| Hardness Rating | 51.0 ROCKWELL C MINIMUM AND 54.0 ROCKWELL C MAXIMUM OVERALL |
| Shank Unthreaded Hole Diameter | 0.071 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS 6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN |
| Grip Diameter | 0.2483 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 260000 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 | 28 |
| Material | STEEL COMP H11 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 0.818 INCHES MINIMUM AND 0.850 INCHES MAXIMUM FIRST HOLE IN |
| Head Diameter | 0.447 INCHES MINIMUM AND 0.507 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 |
|---|---|
| GB510DE410D | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| GB510DE410D | Howmet Global Fastening Systems Inc (USA) |
| GB510DE410D PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| GB510DE410D PRIMARY | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| GB510DE410D | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
| GB510DE410D | 5/2 Secondary reference U.S. Government activity |
| 79901HD-4-10 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| GB510CS4HD10 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
NSN 5305-01-133-3879 is a Screw,close Tolerance, manufactured by Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-133-3879 has 4 manufacturer part numbers on file: GB510DE410D (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), GB510DE410D (Howmet Global Fastening Systems Inc), GB510DE410D (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), GB510DE410D (Hi-Shear Corporation).
Key specifications for GB510DE410D: Fastener Length: 0.986 INCHES MINIMUM AND 1.033 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-C-8837 TYPE 2 CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.351 INCHES MINIMUM AND 0.418 INCHES MAXIMUM IN; Hardness Rating: 51.0 ROCKWELL C MINIMUM AND 54.0 ROCKWELL C MAXIMUM OVERALL. 21 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.