The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-130-3268, 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 16 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-130-3268 |
| Primary Part Number | MB155-7-16 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Head Height | 0.257 INCHES NOMINAL IN |
| Fastener Length | 1.583 INCHES MINIMUM AND 1.630 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.573 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.438 INCHES IN |
| Head Style | SPLINE DRIVE SHEAR HEAD |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN |
| Head Minor Diameter | 0.711 INCHES MINIMUM AND 0.717 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 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 |
|---|---|
| MB155-7-16 PRIMARY | Hi-Shear Corporation (USA) |
| AIC688-7-16 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| S397-7-16 PRIMARY | Huck International, Inc (USA) |
| PBF1266-7-16 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| GS1031-7-16 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| 122896-7-16 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| VCG0002-7-16 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| VS3191-7-16 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| MB155-7-16 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M747-7-16 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| ST3M747-7-16 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| Reference | Meaning |
|---|---|
| ST3M747-7-16 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| S397-7-16 | 5/9 Secondary reference U.S. Government activity |
| VS3191-7-16 | 5/9 Secondary reference U.S. Government activity |
| 122896-7-16 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-130-3268 is a Bolt,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-130-3268 has 11 manufacturer part numbers on file: MB155-7-16 (Hi-Shear Corporation), AIC688-7-16 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), S397-7-16 (Huck International, Inc), PBF1266-7-16 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), GS1031-7-16 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace) and 6 more.
Key specifications for MB155-7-16: Head Height: 0.257 INCHES NOMINAL IN; Fastener Length: 1.583 INCHES MINIMUM AND 1.630 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.573 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN. 16 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.