The Screw,close Tolerance, cataloged under National Stock Number 5305-00-151-8658, 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 Div PB Fasteners. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-00-151-8658 |
| Primary Part Number | PBF1286-741 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| Status | ACTIVE |
| Fastener Length | 1.024 INCHES MINIMUM AND 1.054 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.329 INCHES MINIMUM AND 0.389 INCHES MAXIMUM IN |
| Hardness Rating | 33.0 ROCKWELL C MINIMUM OVERALL |
| Material Document and Classification | AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.665 INCHES MINIMUM AND 0.695 INCHES MAXIMUM IN |
| Grip Diameter | 0.2540 INCHES MINIMUM AND 0.2550 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 150000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | SLOT |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 4037 OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.357 INCHES NOMINAL 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 |
|---|---|
| PBF1286-741 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| GS551P-741 | Heartland Precision Fasteners Inc (USA) |
| Reference | Meaning |
|---|---|
| BM19070-4-741 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| 2R1465-10 | 5/9 Secondary reference Bfgoodrich Co the Aerospace Div Engineered Polymer Products |
| HP6551P4-741 | 5/9 Secondary reference Dolly Mfg Corp |
| 2R1863-1 | 5/9 Secondary reference Bfgoodrich Co the Aerospace Div Engineered Polymer Products |
| BM19049-4-741 | 5/9 Secondary reference U.S. Government activity |
| GS551P4-741 | 5/9 Secondary reference Dolly Mfg Corp |
| BM19070-4-741 | 5/9 Secondary reference U.S. Government activity |
| GS551P4-741 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
NSN 5305-00-151-8658 is a Screw,close Tolerance, manufactured by Sps Technologies Llc Dba PB Fasteners Div PB Fasteners, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-151-8658 has 2 manufacturer part numbers on file: PBF1286-741 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), GS551P-741 (Heartland Precision Fasteners Inc).
Key specifications for PBF1286-741: Fastener Length: 1.024 INCHES MINIMUM AND 1.054 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.329 INCHES MINIMUM AND 0.389 INCHES MAXIMUM IN; Hardness Rating: 33.0 ROCKWELL C MINIMUM OVERALL. 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.