The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-209-7950, 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 18 specifications, cited from the U.S. Government catalog. The record lists 13 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-209-7950 |
| Primary Part Number | ST3M747-3D21 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.140 INCHES NOMINAL IN |
| Fastener Length | 1.627 INCHES MINIMUM AND 1.674 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.305 INCHES MINIMUM AND 0.372 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.070 INCHES MINIMUM AND 0.075 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | SPLINE DRIVE SHEAR HEAD |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.302 INCHES MINIMUM AND 1.322 INCHES MAXIMUM IN |
| Head Minor Diameter | 0.383 INCHES MINIMUM AND 0.389 INCHES MAXIMUM IN |
| Grip Diameter | 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.506 INCHES MINIMUM AND 1.563 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 |
|---|---|
| MB155-3D21 | Hi-Shear Corporation (USA) |
| ST3M747-3D21 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M747-3D21 | Houston Precision Fasteners I Lp (USA) |
| PBF1266-3D21 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| VCG0002-3D21 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M747-3D21 | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| AIC688-3D21 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M747-3D21 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M747-3D21 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| MB155-3D21 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| S397-3D21 | Huck International, Inc (USA) |
| ST3M747-3D21 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M747-3D21 | Heartland Precision Fasteners Inc (USA) |
| Reference | Meaning |
|---|---|
| 10116151 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| S397-3D21 | 5/9 Secondary reference U.S. Government activity |
| VS3191-3D21 | 5/9 Secondary reference U.S. Government activity |
| 122896-3D21 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-01-209-7950 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-209-7950 has 13 manufacturer part numbers on file: MB155-3D21 (Hi-Shear Corporation), ST3M747-3D21 (The Boeing Company Div Defense), ST3M747-3D21 (Houston Precision Fasteners I Lp), PBF1266-3D21 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), VCG0002-3D21 (Valley-Todeco, Inc. Dba Arconic Fastening Systems) and 8 more.
Key specifications for ST3M747-3D21: Head Height: 0.140 INCHES NOMINAL IN; Fastener Length: 1.627 INCHES MINIMUM AND 1.674 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.305 INCHES MINIMUM AND 0.372 INCHES MAXIMUM IN. 18 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.