The Bolt,shear, cataloged under National Stock Number 5306-01-018-8924, 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 10 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-018-8924 |
| Primary Part Number | ST3M561-6D-17 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN |
| Fastener Length | 1.446 INCHES MINIMUM AND 1.493 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 | 1.052 INCHES MINIMUM AND 1.072 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 | 1.321 INCHES MINIMUM AND 1.378 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 |
|---|---|
| BM17028-6-17D | Huck International, Inc (USA) |
| ST3M561-6D-17 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M561-6D-17 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M561-6D-17 | Hi-Shear Corporation (USA) |
| MB13-6D17 | Satair A/s (DNK) |
| ST3M561-6D-17 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M561-6D-17 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M561-6D-17 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| MB13-6D17 | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| ST3M561-6D-17 | Wesco Aircraft Hardware Corp. Dba Incora (USA) |
| Reference | Meaning |
|---|---|
| BM17028-6-17D | 5/9 Secondary reference U.S. Government activity |
| ST3M561-6D-17 | 5/2 Secondary reference U.S. Government activity |
| ST3M561-6D-17 | 5/2 Secondary reference U.S. Government activity |
| 73992-6D17 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| AIC244-6D17 | 5/9 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| MB13-6D17 | 5/9 Secondary reference Hi-Shear Corporation |
NSN 5306-01-018-8924 is a Bolt,shear, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-018-8924 has 10 manufacturer part numbers on file: BM17028-6-17D (Huck International, Inc), ST3M561-6D-17 (Sps Technologies, Llc Dba PB Fasteners), ST3M561-6D-17 (The Boeing Company Div Defense), ST3M561-6D-17 (Hi-Shear Corporation), MB13-6D17 (Satair A/s) and 5 more.
Key specifications for ST3M561-6D-17: Head Height: 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN; Fastener Length: 1.446 INCHES MINIMUM AND 1.493 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.