The Screw,close Tolerance, cataloged under National Stock Number 5305-01-682-0650, 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 23 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-682-0650 |
| Primary Part Number | PBF1166B4-8 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Head Height | 0.063 INCHES NOMINAL IN |
| Point Length | 0.045 INCHES NOMINAL IN |
| Fastener Length | 0.903 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | MIL-C-83488 TYPE II, CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.403 INCHES NOMINAL IN |
| Hardness Rating | 46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | AMS-6487 NATIONAL STD SINGLE MATERIAL RESPONSE OVERALL |
| Point Chamfer Angle | 45.0 DEGREES NOMINAL |
| Nominal Thread Diameter | 0.2500 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Point Style | FLAT |
| Grip Length | 0.500 INCHES NOMINAL IN |
| Grip Diameter | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM OVERALL |
| Minimum Tensile Strength | 4400 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | OFFSET CRUCIFORM (TORQUE SET) |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.350 INCHES MINIMUM AND 0.399 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 |
|---|---|
| PBF1166B4-8 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| PBF1166B4-8 PRIMARY | Huck International, Inc (USA) |
| AIC985B4-8 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| VT1694AS4-8 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| SF117B4-8 PRIMARY | Saturn Fasteners Inc (USA) |
| 121558-4-A8B PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| VT1694AS4-8 | 3/2 Design control — primary reference U.S. Government activity |
| 121558-4-A8B | 3/2 Design control — primary reference U.S. Government activity |
| 985B4-8 | C/1 Advisory reference — outside the item-of-supply concept Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| H185B4-8 | 5/9 Secondary reference U.S. Government activity |
| C7985B4-8 | 7/2 Vendor item drawing reference U.S. Government activity |
| AIC985-4-8B | 5/9 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
NSN 5305-01-682-0650 is a Screw,close Tolerance, manufactured by Huck International, Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-682-0650 has 6 manufacturer part numbers on file: PBF1166B4-8 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), PBF1166B4-8 (Huck International, Inc), AIC985B4-8 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), VT1694AS4-8 (Howmet Global Fastening Systems Inc), SF117B4-8 (Saturn Fasteners Inc) and 1 more.
Key specifications for PBF1166B4-8: Head Height: 0.063 INCHES NOMINAL IN; Point Length: 0.045 INCHES NOMINAL IN; Fastener Length: 0.903 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-C-83488 TYPE II, CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL. 23 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.