The Bolt,shear, cataloged under National Stock Number 5306-01-187-5956, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Huck International, Inc. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 7 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-187-5956 |
| Primary Part Number | S343-4-6 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Extended Washer Thickness | 0.026 INCHES MINIMUM AND 0.046 INCHES MAXIMUM IN |
| Head Height | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| Fastener Length | 0.828 INCHES MINIMUM AND 0.858 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.460 INCHES MINIMUM AND 0.470 INCHES MAXIMUM IN |
| Thread Length | 0.443 INCHES MINIMUM AND 0.493 INCHES MAXIMUM IN |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | SPLINE EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN |
| Head Minor Diameter | 0.297 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 220000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| 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 |
|---|---|
| S343-4-6 | Huck International, Inc (USA) |
| VFK600-4-6 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| GS1032-4-6 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| AIC763-4-6 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| MB156-4-6 | Hi-Shear Corporation (USA) |
| PBF1267-4-6 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| MB156-4-6 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| Reference | Meaning |
|---|---|
| VS3190-4-6 | 5/9 Secondary reference U.S. Government activity |
| ST3M753-4-6 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| ST3M753-4-6 | 5/2 Secondary reference U.S. Government activity |
| VS3190-4-6 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| S343-4-6 | 5/9 Secondary reference U.S. Government activity |
| 122897-4-6 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-187-5956 is a Bolt,shear, manufactured by Huck International, Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-187-5956 has 7 manufacturer part numbers on file: S343-4-6 (Huck International, Inc), VFK600-4-6 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), GS1032-4-6 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), AIC763-4-6 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), MB156-4-6 (Hi-Shear Corporation) and 2 more.
Key specifications for S343-4-6: Extended Washer Thickness: 0.026 INCHES MINIMUM AND 0.046 INCHES MAXIMUM IN; Head Height: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN; Fastener Length: 0.828 INCHES MINIMUM AND 0.858 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.