The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-541-5259, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-541-5259 |
| Primary Part Number | 3M1263-6-26 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Extended Washer Thickness | 0.054 INCHES NOMINAL IN |
| Head Height | 0.337 INCHES NOMINAL IN |
| Fastener Length | 2.239 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | AMS-QQ-P-35 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.696 INCHES NOMINAL IN |
| Thread Length | 0.614 INCHES NOMINAL IN |
| Material Document and Classification | M+35 +34 ASM 5758 OR ASM 5844 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | SPLINE EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.625 INCHES NOMINAL IN |
| Head Minor Diameter | 0.438 INCHES NOMINAL IN |
| Grip Diameter | 0.374 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 20900 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL CORROSION RESISTING 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 |
|---|---|
| 3M1263-6-26 PRIMARY | The Boeing Company Div Defense (USA) |
| 93784-6-26 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| PBF1626-6-26 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
NSN 5306-01-541-5259 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-541-5259 has 3 manufacturer part numbers on file: 3M1263-6-26 (The Boeing Company Div Defense), 93784-6-26 (Sps Technologies, Llc Dba PB Fasteners), PBF1626-6-26 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners).
Key specifications for 3M1263-6-26: Extended Washer Thickness: 0.054 INCHES NOMINAL IN; Head Height: 0.337 INCHES NOMINAL IN; Fastener Length: 2.239 INCHES NOMINAL IN; Surface Treatment Document and Classification: AMS-QQ-P-35 ASSN STD SINGLE TREATMENT RESPONSE 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.