The Bolt,shear, cataloged under National Stock Number 5306-01-247-5288, 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 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-247-5288 |
| Primary Part Number | ST3M571-3-18 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Extended Washer Thickness | 0.054 INCHES MINIMUM AND 0.074 INCHES MAXIMUM IN |
| Head Height | 0.265 INCHES MINIMUM AND 0.285 INCHES MAXIMUM IN |
| Fastener Length | 1.507 INCHES MINIMUM AND 1.537 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.340 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN |
| Thread Length | 0.372 INCHES MINIMUM AND 0.422 INCHES MAXIMUM IN |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM IN |
| Width Between Flats | 0.251 INCHES NOMINAL IN |
| Grip Diameter | 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 220000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| 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 |
|---|---|
| ST3M571-3-18 PRIMARY | The Boeing Company Div Defense (USA) |
| 74328-3-18 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| VAL23033-3-18 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| MB84-3-18 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| AIC752-3-18 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M571-3-18 | J M Precision Inc (USA) |
| S11-1059-3-18 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| ST3M571-3-18 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| MB84-3-18 | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| ST3M571-3-18 | 5/2 Secondary reference U.S. Government activity |
| 74328-3-18 | 5/2 Secondary reference U.S. Government activity |
| BM3326-3-18 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| VS3060-3-18 | 5/9 Secondary reference U.S. Government activity |
| S371-3-18 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| S371-3-18 | 5/9 Secondary reference U.S. Government activity |
| BM3326-3-18 | 5/9 Secondary reference U.S. Government activity |
| VS3060-3-18 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
NSN 5306-01-247-5288 is a Bolt,shear, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-247-5288 has 9 manufacturer part numbers on file: ST3M571-3-18 (The Boeing Company Div Defense), 74328-3-18 (Sps Technologies, Llc Dba PB Fasteners), VAL23033-3-18 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), MB84-3-18 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), AIC752-3-18 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company) and 4 more.
Key specifications for ST3M571-3-18: Extended Washer Thickness: 0.054 INCHES MINIMUM AND 0.074 INCHES MAXIMUM IN; Head Height: 0.265 INCHES MINIMUM AND 0.285 INCHES MAXIMUM IN; Fastener Length: 1.507 INCHES MINIMUM AND 1.537 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 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.