The Bolt,shear, cataloged under National Stock Number 5306-01-016-5518, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 9 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-016-5518 |
| Primary Part Number | AIC244-6D21 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| Status | ACTIVE |
| Head Height | 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN |
| Fastener Length | 1.696 INCHES MINIMUM AND 1.743 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MAC PS13145,MCDONNELL DOUGLAS CORP 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 | 1.302 INCHES MINIMUM AND 1.322 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 |
| Minimum Tensile Strength | 17100 POUNDS PER SQUARE INCH LBS |
| 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 | 1.571 INCHES MINIMUM AND 1.628 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 |
|---|---|
| MB13-6D21 | Satair A/s (DNK) |
| VS3147-6D-21 | Howmet Global Fastening Systems Inc (USA) |
| MB13-6D21 | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| AIC244-6D21 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BM17028-6-21D PRIMARY | Huck International, Inc (USA) |
| 73992-6D21 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| MB13-6D21 PRIMARY | Hi-Shear Corporation (USA) |
| MB13-6D21 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| PBF1225-6D-21 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| BM17028-6-21D | 5/9 Secondary reference U.S. Government activity |
| ST3M561-6D-21 | 5/9 Secondary reference Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| VS3147-6D21 | 3/2 Design control — primary reference U.S. Government activity |
| ST3M561-6D-21 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| ST3M561 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-016-5518 is a Bolt,shear, manufactured by Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-016-5518 has 9 manufacturer part numbers on file: MB13-6D21 (Satair A/s), VS3147-6D-21 (Howmet Global Fastening Systems Inc), MB13-6D21 (Fairchild Fasteners Europe - Vsd Gmbh), AIC244-6D21 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BM17028-6-21D (Huck International, Inc) and 4 more.
Key specifications for AIC244-6D21: Head Height: 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN; Fastener Length: 1.696 INCHES MINIMUM AND 1.743 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MAC PS13145,MCDONNELL DOUGLAS CORP MFR REF SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.400 INCHES NOMINAL IN. 19 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.