The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-613-4779, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Houston Precision Fasteners I Lp. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 8 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-613-4779 |
| Primary Part Number | STSBG001A07U014 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Houston Precision Fasteners I Lp |
| Status | ACTIVE |
| Head Height | 0.247 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN |
| Fastener Length | 1.849 INCHES MINIMUM AND 1.896 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | STSBS001 MFR REF ALL TREATMENT RESPONSES OVERALL |
| Thread Length | 0.495 INCHES NOMINAL IN |
| Material Document and Classification | STSBS001 H-11 STEEL MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.4375 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.360 INCHES MINIMUM AND 1.380 INCHES MAXIMUM IN |
| Width Between Flats | 0.678 INCHES MINIMUM AND 0.689 INCHES MAXIMUM IN |
| Grip Diameter | 0.4360 INCHES MINIMUM AND 0.4370 INCHES MAXIMUM IN |
| Surface Treatment | CHROMATE AND CADMIUM OVERALL |
| Minimum Tensile Strength | 156000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| STSBG001A07U014 | Houston Precision Fasteners I Lp (USA) |
| STSBG001A07U014 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| STSBG001A07U014 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| STSBG001A07U014 | John Hassall Llc Dba Sky Aerospace Products (USA) |
| STSBG001A07U014 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| STSBG001A07U014 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| STSBG001A07U014 | Howmet Global Fastening Systems Inc (USA) |
| STSBG001A07U014 | Reid Products Inc. Dba Reid Products Inc (USA) |
| Reference | Meaning |
|---|---|
| STSBG001A07U014 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-613-4779 is a Bolt,close Tolerance, manufactured by Houston Precision Fasteners I Lp, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-613-4779 has 8 manufacturer part numbers on file: STSBG001A07U014 (Houston Precision Fasteners I Lp), STSBG001A07U014 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), STSBG001A07U014 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), STSBG001A07U014 (John Hassall Llc Dba Sky Aerospace Products), STSBG001A07U014 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners) and 3 more.
Key specifications for STSBG001A07U014: Head Height: 0.247 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN; Fastener Length: 1.849 INCHES MINIMUM AND 1.896 INCHES MAXIMUM IN; Surface Treatment Document and Classification: STSBS001 MFR REF ALL TREATMENT RESPONSES OVERALL; Thread Length: 0.495 INCHES NOMINAL IN. 17 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.