The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-165-3307, 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 20 specifications, cited from the U.S. Government catalog. The record lists 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-165-3307 |
| Primary Part Number | ST3M735-4-54 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES GRIP |
| Surface Finish | 63.0 MICROINCHES BEARING SURFACE OF HEAD |
| Head Height | 0.126 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN |
| Fastener Length | 3.793 INCHES MINIMUM AND 3.813 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2 CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.282 INCHES MINIMUM AND 0.333 INCHES MAXIMUM IN |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 41.0 ROCKWELL C MAXIMUM OVERALL |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.086 INCHES MAXIMUM FIRST HOLE IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | DISHED HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 3.375 INCHES MINIMUM AND 3.391 INCHES MAXIMUM IN |
| Width Between Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Grip Diameter | 0.2483 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP E4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 4130 OR STEEL COMP 6150 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 4.121 INCHES MINIMUM AND 4.151 INCHES MAXIMUM FIRST HOLE 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 |
|---|---|
| ST3M735-4-54 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M735-4-54 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M735-4-54 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M735-4-54 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M735-4-54 | Hi-Shear Corporation (USA) |
| ST3M735-4-54 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M735-4-54 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 121673-4-54 | 3/2 Design control — primary reference U.S. Government activity |
| ST3M735-4-54 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-01-165-3307 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-165-3307 has 7 manufacturer part numbers on file: ST3M735-4-54 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), ST3M735-4-54 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), ST3M735-4-54 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), ST3M735-4-54 (Sps Technologies, Llc Dba PB Fasteners), ST3M735-4-54 (Hi-Shear Corporation) and 2 more.
Key specifications for ST3M735-4-54: Surface Finish: 63.0 MICROINCHES GRIP; Surface Finish: 63.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.126 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN; Fastener Length: 3.793 INCHES MINIMUM AND 3.813 INCHES MAXIMUM IN. 20 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.