The Screw,close Tolerance, cataloged under National Stock Number 5305-01-059-0228, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba PB Fasteners. Government technical data includes 19 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-059-0228 |
| Primary Part Number | GB510FD8-86 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Fastener Length | 6.120 INCHES MINIMUM AND 6.167 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-8837 TY 2 CL 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.735 INCHES MINIMUM AND 0.802 INCHES MAXIMUM IN |
| Hardness Rating | 46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | AMS 6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 5.365 INCHES MINIMUM AND 5.385 INCHES MAXIMUM IN |
| Grip Diameter | 0.4982 INCHES MINIMUM AND 0.4991 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP H11 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.950 INCHES MINIMUM AND 1.017 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 |
|---|---|
| GB510FD8-86 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| GB510FD8-86 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| GB510FD8-86 | Hi-Shear Corporation (USA) |
| GB510FD8-86 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| GB510CE8-86 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| 106706H-8-86 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| H148-8-86 | 3/9 Design control — primary reference U.S. Government activity |
| H148-8-86 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| GB510BC8-86 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| HT171-8-86 | 3/2 Design control — primary reference U.S. Government activity |
| GB510FD8-86 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
| 106706H-8-86 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-059-0228 is a Screw,close Tolerance, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-059-0228 has 4 manufacturer part numbers on file: GB510FD8-86 (Sps Technologies, Llc Dba PB Fasteners), GB510FD8-86 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), GB510FD8-86 (Hi-Shear Corporation), GB510FD8-86 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners).
Key specifications for GB510FD8-86: Surface Finish: 32.0 MICROINCHES GRIP; Fastener Length: 6.120 INCHES MINIMUM AND 6.167 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-C-8837 TY 2 CL 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.735 INCHES MINIMUM AND 0.802 INCHES MAXIMUM IN. 19 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.