The Bolt,shear, cataloged under National Stock Number 5306-01-021-2314, 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 6 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-021-2314 |
| Primary Part Number | MB13-6D18 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Head Height | 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN |
| Fastener Length | 1.509 INCHES MINIMUM AND 1.554 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MAC PS13145,FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.400 INCHES NOMINAL IN |
| Shank Unthreaded Hole Diameter | 0.106 INCHES MINIMUM AND 0.111 INCHES MAXIMUM FIRST HOLE IN |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 76301-ST3-561 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Grip Length | 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM IN |
| Width Between Flats | 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN |
| Grip Diameter | 0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.384 INCHES MINIMUM AND 1.439 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 |
|---|---|
| MB13-6D18 | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| MB13-6D18 | Satair A/s (DNK) |
| MB13-6D18 PRIMARY | Hi-Shear Corporation (USA) |
| PBF1225-6D-18 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| AIC244-6D18 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| MB13-6D18 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| Reference | Meaning |
|---|---|
| 73992-6D18 | 3/9 Design control — primary reference Standard Pressed Steel Co Aircraft Products Div |
| ST3M561-6D-18 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| ST3M561-6D-18 | 5/1 Secondary reference Arizona Aero Fasteners, Inc Dba Arizona Aero Fasteners Inc |
NSN 5306-01-021-2314 is a Bolt,shear, manufactured by Hi-Shear Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-021-2314 has 6 manufacturer part numbers on file: MB13-6D18 (Fairchild Fasteners Europe - Vsd Gmbh), MB13-6D18 (Satair A/s), MB13-6D18 (Hi-Shear Corporation), PBF1225-6D-18 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), AIC244-6D18 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company) and 1 more.
Key specifications for MB13-6D18: Head Height: 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN; Fastener Length: 1.509 INCHES MINIMUM AND 1.554 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MAC PS13145,FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.400 INCHES NOMINAL 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.