The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-457-5308, 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 11 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-457-5308 |
| Primary Part Number | ST3M747-5-7 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Head Height | 0.271 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN |
| Fastener Length | 1.042 INCHES MINIMUM AND 1.072 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.619 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5629 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | SPLINE DRIVE SHEAR HEAD |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN |
| Head Minor Diameter | 0.772 INCHES MINIMUM IN |
| Grip Diameter | 0.4990 INCHES MINIMUM AND 0.4995 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP XM-13 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 |
|---|---|
| ST3M747-5-7 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| SLB254-5-7 | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| ST3M747-5-7 | Heartland Precision Fasteners Inc (USA) |
| ST3M747-5-7 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M747-5-7 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| S397-5-7 | Huck International, Inc (USA) |
| ST3M747-5-7 | Houston Precision Fasteners I Lp (USA) |
| GS1031-5-7 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| ST3M747-5-7 | Hi-Shear Corporation (USA) |
| ST3M747-5-7 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M747-5-7 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| VS3191-5-7 | 5/9 Secondary reference U.S. Government activity |
| VS3191-5-7 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| ST3M747-5-7 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-01-457-5308 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-457-5308 has 11 manufacturer part numbers on file: ST3M747-5-7 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), SLB254-5-7 (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok), ST3M747-5-7 (Heartland Precision Fasteners Inc), ST3M747-5-7 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), ST3M747-5-7 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 6 more.
Key specifications for ST3M747-5-7: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.271 INCHES MINIMUM AND 0.291 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.