The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-239-0583, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 14 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-239-0583 |
| Primary Part Number | MB155-5D12 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Hi-Shear Corporation |
| 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 | 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN |
| Fastener Length | 1.202 INCHES MINIMUM AND 1.232 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.442 INCHES MINIMUM AND 0.492 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | SPLINE DRIVE SHEAR HEAD |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN |
| Head Minor Diameter | 0.512 INCHES MINIMUM IN |
| Grip Diameter | 0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.078 INCHES MINIMUM AND 1.118 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 |
|---|---|
| ST3M747-5D12 | M.s. Aerospace Inc. Dba Ms Aerospace Inc (USA) |
| MB155-5D12 PRIMARY | Hi-Shear Corporation (USA) |
| VS3191-5D12 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| AIC688-5D12 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M747-5D12 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M747-5D12 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| MB155-5D12 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M747-5D12 | Houston Precision Fasteners I Lp (USA) |
| SLB254-5D12 PRIMARY | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| GS1031-5D12 PRIMARY | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| PBF1266-5D12 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| S397-5D12 PRIMARY | Huck International, Inc (USA) |
| ST3M747-5D12 | Heartland Precision Fasteners Inc (USA) |
| VCG0002-5D12 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| Reference | Meaning |
|---|---|
| ST3M747-5012 | C/1 Advisory reference — outside the item-of-supply concept The Boeing Company Div Defense |
| 122896-5D12 | 3/2 Design control — primary reference U.S. Government activity |
| ST3M747-5D12 | 5/9 Secondary reference U.S. Government activity |
| VS3191-5D12 | 5/9 Secondary reference U.S. Government activity |
| S397-5D12 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-239-0583 is a Bolt,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-239-0583 has 14 manufacturer part numbers on file: ST3M747-5D12 (M.s. Aerospace Inc. Dba Ms Aerospace Inc), MB155-5D12 (Hi-Shear Corporation), VS3191-5D12 (Howmet Global Fastening Systems Inc), AIC688-5D12 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), ST3M747-5D12 (The Boeing Company Div Defense) and 9 more.
Key specifications for MB155-5D12: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN. 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.