The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-144-3908, 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 22 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-144-3908 |
| Primary Part Number | 3M918-7H45 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Extended Washer Thickness | 0.089 INCHES MINIMUM AND 0.109 INCHES MAXIMUM IN |
| Head Height | 0.425 INCHES MINIMUM AND 0.445 INCHES MAXIMUM IN |
| Fastener Length | 5.037 INCHES MINIMUM AND 5.067 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Thread Length | 2.215 INCHES MINIMUM AND 2.265 INCHES MAXIMUM IN |
| Hole Configuration Style | DOUBLE HEXAGON LONGITUDINAL HOLE |
| Material Document and Classification | 23-112 FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.438 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 2.802 INCHES MINIMUM AND 2.822 INCHES MAXIMUM IN |
| Width Between Flats | 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Grip Diameter | 0.4365 INCHES MINIMUM AND 0.4370 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Hole Quantity | 2 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Hole Type | DRILLED |
| Hole Diameter | 0.050 INCHES MINIMUM AND 0.060 INCHES MAXIMUM 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 |
|---|---|
| 3M918-7H45 | Hi-Shear Corporation (USA) |
| 3M918-7H45 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 3M918-7H45 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 3M918-7H45 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 3M918-7H45 PRIMARY | The Boeing Company Div Defense (USA) |
| 3M918-7H45 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 3M918-7H45 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| 3M918-7H45 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| 3M918-7H45 | 5/2 Secondary reference U.S. Government activity |
| 3M918-7H45 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5306-01-144-3908 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-144-3908 has 7 manufacturer part numbers on file: 3M918-7H45 (Hi-Shear Corporation), 3M918-7H45 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), 3M918-7H45 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), 3M918-7H45 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), 3M918-7H45 (The Boeing Company Div Defense) and 2 more.
Key specifications for 3M918-7H45: Extended Washer Thickness: 0.089 INCHES MINIMUM AND 0.109 INCHES MAXIMUM IN; Head Height: 0.425 INCHES MINIMUM AND 0.445 INCHES MAXIMUM IN; Fastener Length: 5.037 INCHES MINIMUM AND 5.067 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 22 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.