The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-481-9309, 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 20 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-481-9309 |
| Primary Part Number | S343-3-14 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Extended Washer Thickness | 0.027 INCHES NOMINAL IN |
| Head Height | 0.205 INCHES NOMINAL IN |
| Fastener Length | 1.259 INCHES MINIMUM AND 1.289 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.349 INCHES MINIMUM AND 0.359 INCHES MAXIMUM IN |
| Thread Length | 0.399 INCHES NOMINAL IN |
| Criticality Code Justification | AGAV |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | SPLINE EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.875 INCHES NOMINAL IN |
| Head Minor Diameter | 0.235 INCHES MINIMUM AND 0.250 INCHES MAXIMUM 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 | Y |
| Part Number | Manufacturer |
|---|---|
| 11829-3-14 | Reid Products Inc. Dba Reid Products Inc (USA) |
| S343-3-14 PRIMARY | Huck International, Inc (USA) |
| VFK600-3-14 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| SLB255-3-14 PRIMARY | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| PBF1267-3-14 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| GS1032-3-14 PRIMARY | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| VS3190-3-14 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| MB156-3-14 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HP7753-3-14 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| 122897-3-14 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M753-3-14 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M753-3-14 | Houston Precision Fasteners I Lp (USA) |
| AIC763-3-14 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| MB156-3-14 PRIMARY | Hi-Shear Corporation (USA) |
| ST3M753-3-14 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| VS3190-3-14 | 3/2 Design control — primary reference U.S. Government activity |
| 122897-3-14 | 3/2 Design control — primary reference U.S. Government activity |
| S343-3-14 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-481-9309 is a Bolt,close Tolerance, manufactured by Huck International, Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-481-9309 has 15 manufacturer part numbers on file: 11829-3-14 (Reid Products Inc. Dba Reid Products Inc), S343-3-14 (Huck International, Inc), VFK600-3-14 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), SLB255-3-14 (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok), PBF1267-3-14 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners) and 10 more.
Key specifications for S343-3-14: Extended Washer Thickness: 0.027 INCHES NOMINAL IN; Head Height: 0.205 INCHES NOMINAL IN; Fastener Length: 1.259 INCHES MINIMUM AND 1.289 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 20 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.