The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-444-6743, 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 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-444-6743 |
| Primary Part Number | PBF1549-10C38H |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| Status | ACTIVE |
| Extended Washer Thickness | 0.125 INCHES NOMINAL IN |
| Head Height | 0.673 INCHES NOMINAL IN |
| Fastener Length | 3.527 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-416 TY2,CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 1.185 INCHES MINIMUM AND 1.195 INCHES MAXIMUM IN |
| Thread Length | 1.152 INCHES NOMINAL IN |
| Material Document and Classification | AMS5844 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.625 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 2.375 INCHES NOMINAL IN |
| Width Between Flats | 0.917 INCHES MINIMUM IN |
| Grip Diameter | 0.6230 INCHES MINIMUM AND 0.6240 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Minimum Tensile Strength | 260000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 18 |
| Material | COBALT COMP MP-35-N 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 |
|---|---|
| PBF1549-10C38H PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 83048C10H-38 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| GB511FG10C38H | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
NSN 5306-01-444-6743 is a Bolt,close Tolerance, manufactured by Sps Technologies Llc Dba PB Fasteners Div PB Fasteners, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-444-6743 has 2 manufacturer part numbers on file: PBF1549-10C38H (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), 83048C10H-38 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for PBF1549-10C38H: Extended Washer Thickness: 0.125 INCHES NOMINAL IN; Head Height: 0.673 INCHES NOMINAL IN; Fastener Length: 3.527 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-416 TY2,CL2 FED SPEC 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.