The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-475-0638, 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 16 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-475-0638 |
| Primary Part Number | VS3190-5-18 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Extended Washer Thickness | 0.045 INCHES NOMINAL IN |
| Head Height | 0.312 INCHES NOMINAL IN |
| Fastener Length | 1.676 INCHES NOMINAL IN |
| Extended Washer Diameter | 0.580 INCHES NOMINAL IN |
| Thread Length | 0.551 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.3125 INCHES IN |
| Head Style | SPLINE EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.125 INCHES NOMINAL IN |
| Head Minor Diameter | 0.375 INCHES NOMINAL IN |
| Grip Diameter | 0.312 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL CORROSION RESISTING 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 |
|---|---|
| HP7753-5-18 | Heartland Precision Fasteners Inc (USA) |
| GS1032-5-18 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| VS3190-5-18 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| AIC763-5-18 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M753-5-18 | Houston Precision Fasteners I Lp (USA) |
| PBF1267-5-18 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 11829-5-15 | Reid Products Inc. Dba Reid Products Inc (USA) |
| VFK600-5-18 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M753-5-189 | Saturn Fasteners Inc (USA) |
| ST3M753 | The Boeing Company Div Defense (USA) |
| 122897-5-18 | Visicom Laboratories Inc (USA) |
| SLB255-5-18 | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| MB156-5-18 | Hi-Shear Corporation (USA) |
| S343-5-18 PRIMARY | Huck International, Inc (USA) |
| 122897-5-18 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M753-5-18 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| Reference | Meaning |
|---|---|
| 122897-5-18 | 5/9 Secondary reference Centralab Canada Ltd |
| ST3M753-5-18 | 5/9 Secondary reference Bae Systems Plc |
| 122897-5-18 | 5/2 Secondary reference U.S. Government activity |
| ST3M753-5-18 | 5/9 Secondary reference Bae Systems (operations) Limited |
| ST3M753-5-18 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| ST3M753-5-18 | 5/9 Secondary reference British Aerospace (military Aircraft & Aerostructures) |
NSN 5306-01-475-0638 is a Bolt,close Tolerance, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-475-0638 has 16 manufacturer part numbers on file: HP7753-5-18 (Heartland Precision Fasteners Inc), GS1032-5-18 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), VS3190-5-18 (Howmet Global Fastening Systems Inc), AIC763-5-18 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), ST3M753-5-18 (Houston Precision Fasteners I Lp) and 11 more.
Key specifications for VS3190-5-18: Extended Washer Thickness: 0.045 INCHES NOMINAL IN; Head Height: 0.312 INCHES NOMINAL IN; Fastener Length: 1.676 INCHES NOMINAL IN; Extended Washer Diameter: 0.580 INCHES NOMINAL 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.