The Bolt,shear, cataloged under National Stock Number 5306-01-623-1845, 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 17 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-623-1845 |
| Primary Part Number | ST3M571-12-38 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Extended Washer Thickness | 0.168 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN |
| Head Height | 0.701 INCHES MINIMUM AND 0.721 INCHES MAXIMUM IN |
| Fastener Length | 3.427 INCHES NOMINAL IN |
| Extended Washer Diameter | 1.220 INCHES MINIMUM AND 1.230 INCHES MAXIMUM IN |
| Thread Length | 1.052 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.750 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 2.375 INCHES NOMINAL IN |
| Width Between Flats | 0.803 INCHES MINIMUM AND 0.814 INCHES MAXIMUM IN |
| Grip Diameter | 0.748 INCHES MINIMUM AND 0.749 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 220000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 16 |
| 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 |
|---|---|
| ST3M571-12-38 PRIMARY | The Boeing Company Div Defense (USA) |
| MB84-12-38 | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| ST3M571 | D/9 Drawing number reference only The Boeing Company Div Defense |
NSN 5306-01-623-1845 is a Bolt,shear, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-623-1845 has 2 manufacturer part numbers on file: ST3M571-12-38 (The Boeing Company Div Defense), MB84-12-38 (Hi-Shear Corporation).
1 possible match (shared part number, not a government interchangeability claim): 5306-01-723-2705. Verify interchangeability with system specifications before substitution.
Key specifications for ST3M571-12-38: Extended Washer Thickness: 0.168 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN; Head Height: 0.701 INCHES MINIMUM AND 0.721 INCHES MAXIMUM IN; Fastener Length: 3.427 INCHES NOMINAL IN; Extended Washer Diameter: 1.220 INCHES MINIMUM AND 1.230 INCHES MAXIMUM IN. 17 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.