The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-171-3608, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 11 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-171-3608 |
| Primary Part Number | VS3191-4-14 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Head Height | 0.164 INCHES NOMINAL IN |
| Fastener Length | 1.256 INCHES MINIMUM AND 1.303 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.371 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | SPLINE DRIVE SHEAR HEAD |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.865 INCHES MINIMUM AND 0.885 INCHES MAXIMUM IN |
| Head Minor Diameter | 0.448 INCHES MINIMUM AND 0.455 INCHES MAXIMUM IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| 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 |
|---|---|
| VS3191-4-14 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| GS1031-4-14 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| MB155-4-14 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| AIC688-4-14 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 122896-4-14 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M747-4-14 | Heartland Precision Fasteners Inc (USA) |
| MB155-4-14 | Hi-Shear Corporation (USA) |
| PBF1266-4-14 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| VCG0002-4-14 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| S397-4-14 | Huck International, Inc (USA) |
| ST3M747-4-14 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| Reference | Meaning |
|---|---|
| S397-4-14 | 5/9 Secondary reference U.S. Government activity |
| ST3M747-4-14 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| VS3191-4-14 | 5/9 Secondary reference U.S. Government activity |
| 122896-4-14 | 5/2 Secondary reference U.S. Government activity |
| 10116083 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5306-01-171-3608 is a Bolt,close Tolerance, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-171-3608 has 11 manufacturer part numbers on file: VS3191-4-14 (Howmet Global Fastening Systems Inc), GS1031-4-14 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), MB155-4-14 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), AIC688-4-14 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), 122896-4-14 (Sps Technologies, Llc Dba PB Fasteners) and 6 more.
Key specifications for VS3191-4-14: Head Height: 0.164 INCHES NOMINAL IN; Fastener Length: 1.256 INCHES MINIMUM AND 1.303 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.371 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN. 16 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.