The Bolt,shoulder, cataloged under National Stock Number 5306-01-481-2826, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies Llc Dba PB Fasteners Div PB Fasteners. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-481-2826 |
| Primary Part Number | PBF1602U4-36 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| Status | ACTIVE |
| Head Height | 0.172 INCHES MINIMUM AND 0.204 INCHES MAXIMUM IN |
| Fastener Length | 2.703 INCHES MINIMUM AND 2.743 INCHES MAXIMUM IN |
| Shoulder Length | 0.760 INCHES MINIMUM AND 0.780 INCHES MAXIMUM OVERALL IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC 1ST TREATMENT RESPONSE OR QQ-P-416,TY2,CL2 FED SPEC 2ND TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.869 INCHES MINIMUM AND 0.921 INCHES MAXIMUM OVERALL IN |
| Thread Length | 0.453 INCHES NOMINAL IN |
| Shoulder Shape | ROUND OVERALL |
| Material Document and Classification | AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD 1ST MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OR CADMIUM OVERALL |
| Minimum Tensile Strength | 95000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | IRON ALLOY 660 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| PBF1602U4-36 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| SLB530U4-36 PRIMARY | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| VS3589-4-36 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| FIT7807U4-36 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| 1690U4-36 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| 3D0124U4-36 | 5/2 Secondary reference U.S. Government activity |
| AIC1690U-4-36 | 5/9 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| VS3589-4-36 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-481-2826 is a Bolt,shoulder, manufactured by Sps Technologies Llc Dba PB Fasteners Div PB Fasteners, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-481-2826 has 5 manufacturer part numbers on file: PBF1602U4-36 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), SLB530U4-36 (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok), VS3589-4-36 (Howmet Global Fastening Systems Inc), FIT7807U4-36 (Fastener Innovation Technology, Inc. Dba F I T), 1690U4-36 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company).
Key specifications for PBF1602U4-36: Head Height: 0.172 INCHES MINIMUM AND 0.204 INCHES MAXIMUM IN; Fastener Length: 2.703 INCHES MINIMUM AND 2.743 INCHES MAXIMUM IN; Shoulder Length: 0.760 INCHES MINIMUM AND 0.780 INCHES MAXIMUM OVERALL IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC 1ST TREATMENT RESPONSE OR QQ-P-416,TY2,CL2 FED SPEC 2ND TREATMENT RESPONSE OVERALL. 18 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.