The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-165-3311, 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 18 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-165-3311 |
| Primary Part Number | MB155-3D20 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Head Height | 0.140 INCHES NOMINAL IN |
| Fastener Length | 1.565 INCHES MINIMUM AND 1.612 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 | AMS 5629 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 | 1.240 INCHES MINIMUM AND 1.260 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 | 1.444 INCHES MINIMUM AND 1.501 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 |
|---|---|
| MB155-3D20 PRIMARY | Hi-Shear Corporation (USA) |
| AIC688-3D20 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| GS1031-3D20 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| VCG0002-3D20 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| MB155-3D20 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| PBF1266-3D20 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M747-3D20 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| VS3191-3D20 | 5/9 Secondary reference U.S. Government activity |
| ST3M747-3D20 | 5/2 Secondary reference U.S. Government activity |
| 122896-3D20 | 3/2 Design control — primary reference U.S. Government activity |
| VS3191-3D20 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| S397-3D20 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| S397-3D20 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-165-3311 is a Bolt,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-165-3311 has 7 manufacturer part numbers on file: MB155-3D20 (Hi-Shear Corporation), AIC688-3D20 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), GS1031-3D20 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), VCG0002-3D20 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), MB155-3D20 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 2 more.
Key specifications for MB155-3D20: Head Height: 0.140 INCHES NOMINAL IN; Fastener Length: 1.565 INCHES MINIMUM AND 1.612 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.