The Bolt,shear, cataloged under National Stock Number 5306-01-253-7118, 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 15 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-253-7118 |
| Primary Part Number | ST3M571-8-20 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Extended Washer Thickness | 0.113 INCHES MINIMUM AND 0.133 INCHES MAXIMUM IN |
| Head Height | 0.494 INCHES MINIMUM AND 0.514 INCHES MAXIMUM IN |
| Fastener Length | 2.002 INCHES MINIMUM AND 2.032 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.818 INCHES MINIMUM AND 0.828 INCHES MAXIMUM IN |
| Thread Length | 0.742 INCHES MINIMUM AND 0.792 INCHES MAXIMUM IN |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM IN |
| Width Between Flats | 0.564 INCHES NOMINAL IN |
| Grip Diameter | 0.4990 INCHES MINIMUM AND 0.4995 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 220000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| 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 |
|---|---|
| VAL23033-8-20 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 11831-820 | Reid Products Inc. Dba Reid Products Inc (USA) |
| MB84-8-20 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M571-8-20 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| GS1030-8-20 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| BM3326-8-20 | Huck International, Inc (USA) |
| HP7571-320 | Heartland Precision Fasteners Inc (USA) |
| AIC752-8-20 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 74328-8-20 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| S11-1059-8-20 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| VS3060-8-20 | Howmet Global Fastening Systems Inc (USA) |
| ST3M571-8-20 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M571-8-20 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M571-8-20 | J M Precision Inc (USA) |
| MB84-8-20 | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| S371-8-20 | 5/9 Secondary reference U.S. Government activity |
| ST3M571-8-20 | 5/9 Secondary reference Heartland Precision Fasteners Inc |
| ST3M571-8-20 | 5/9 Secondary reference Reid Products Inc. Dba Reid Products Inc |
| ST3M571-8-20 | 5/2 Secondary reference U.S. Government activity |
| S371-8-20 | 5/9 Secondary reference Huck International, Inc |
| BM3326-8-20 | 5/9 Secondary reference U.S. Government activity |
| 74328-8-20 | 5/2 Secondary reference U.S. Government activity |
| VS3060-8-20 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-253-7118 is a Bolt,shear, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-253-7118 has 15 manufacturer part numbers on file: VAL23033-8-20 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), 11831-820 (Reid Products Inc. Dba Reid Products Inc), MB84-8-20 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), ST3M571-8-20 (Fastener Innovation Technology, Inc. Dba F I T), GS1030-8-20 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace) and 10 more.
Key specifications for ST3M571-8-20: Extended Washer Thickness: 0.113 INCHES MINIMUM AND 0.133 INCHES MAXIMUM IN; Head Height: 0.494 INCHES MINIMUM AND 0.514 INCHES MAXIMUM IN; Fastener Length: 2.002 INCHES MINIMUM AND 2.032 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.