The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-141-0439, 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 14 specifications, cited from the U.S. Government catalog. The record lists 22 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-141-0439 |
| Primary Part Number | S353-6-11 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Head Height | 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN |
| Fastener Length | 1.188 INCHES MINIMUM AND 1.235 INCHES MAXIMUM IN |
| Thread Length | 0.490 INCHES MINIMUM AND 0.557 INCHES MAXIMUM IN |
| Material Document and Classification | 23-112 FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN |
| Width Between Flats | 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN |
| Grip Diameter | 0.3740 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL 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 |
|---|---|
| GS1016-6-11 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| ST3M453-6-11 | J M Precision Inc (USA) |
| S353-6-11 PRIMARY | Huck International, Inc (USA) |
| FIT7047-6-11 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M453-6-11 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M453-6-11 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| MB61-6-11 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M453-6-11 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| VAL23029-6-11 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M453-6-11 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BM17019-6-11 PRIMARY | Huck International, Inc (USA) |
| ST3M453-6-11 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| ST3M453-6-11 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| PBF1253-6-11 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M453-6-11 | Hi-Shear Corporation (USA) |
| AIC753-6-11 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| MB61-6-11 | Hi-Shear Corporation (USA) |
| ST3M453-6-11 | Heartland Precision Fasteners Inc (USA) |
| ST3M453-6-11 PRIMARY | The Boeing Company Div Defense (USA) |
| S11-1060-6-11 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| Reference | Meaning |
|---|---|
| ST3M453-6-11 | 5/9 Secondary reference Kenaloy Products Inc Sub Masco Corp |
| ST3M453-6-11 | 5/9 Secondary reference M.s. Aerospace Inc. Dba Ms Aerospace Inc |
| ST3M453-6-11 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| ST3M453-6-11 | 5/2 Secondary reference U.S. Government activity |
| 109453-6-11 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| BM17019-6-11 | 5/9 Secondary reference U.S. Government activity |
| 109453-6-11 | 5/2 Secondary reference U.S. Government activity |
| VS3204-6-11 | 5/9 Secondary reference U.S. Government activity |
| S353-6-11 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-141-0439 is a Bolt,close Tolerance, manufactured by Huck International, Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-141-0439 has 22 manufacturer part numbers on file: GS1016-6-11 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), ST3M453-6-11 (J M Precision Inc), S353-6-11 (Huck International, Inc), FIT7047-6-11 (Fastener Innovation Technology, Inc. Dba F I T), ST3M453-6-11 (Sps Technologies, Llc Dba PB Fasteners) and 17 more.
Key specifications for S353-6-11: Head Height: 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN; Fastener Length: 1.188 INCHES MINIMUM AND 1.235 INCHES MAXIMUM IN; Thread Length: 0.490 INCHES MINIMUM AND 0.557 INCHES MAXIMUM IN; Material Document and Classification: 23-112 FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL. 14 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.