The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-481-3014, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Fastener Innovation Technology, Inc. Dba F I T. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 12 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-481-3014 |
| Primary Part Number | ST3M747-4-20 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Fastener Innovation Technology, Inc. Dba F I T |
| Status | ACTIVE |
| Head Height | 0.164 INCHES NOMINAL IN |
| Fastener Length | 1.631 INCHES MINIMUM AND 1.678 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS 5629 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.397 INCHES NOMINAL IN |
| Criticality Code Justification | AGAV |
| 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 | 1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM IN |
| Head Minor Diameter | 0.522 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN |
| Grip Diameter | 0.422 INCHES MINIMUM AND 0.446 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| 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 | Y |
| Part Number | Manufacturer |
|---|---|
| ST3M747-4-20 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| SLB254-4-20 PRIMARY | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| AIC688-4-20 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M747-4-20 | Houston Precision Fasteners I Lp (USA) |
| PBF1266-4-20 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| GS1031-4-20 PRIMARY | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| HP7747-4-20 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| VCG0002-4-20 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| MB155-4-20 PRIMARY | Hi-Shear Corporation (USA) |
| 122896-4-20 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M747-4-20 PRIMARY | The Boeing Company Div Defense (USA) |
| S397-4-20 PRIMARY | Huck International, Inc (USA) |
| Reference | Meaning |
|---|---|
| 122896-4-20 | 3/2 Design control — primary reference U.S. Government activity |
| 122896-4-20 | 5/9 Secondary reference Sps Technologies Inc |
NSN 5306-01-481-3014 is a Bolt,close Tolerance, manufactured by Fastener Innovation Technology, Inc. Dba F I T, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-481-3014 has 12 manufacturer part numbers on file: ST3M747-4-20 (Fastener Innovation Technology, Inc. Dba F I T), SLB254-4-20 (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok), AIC688-4-20 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), ST3M747-4-20 (Houston Precision Fasteners I Lp), PBF1266-4-20 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners) and 7 more.
Key specifications for ST3M747-4-20: Head Height: 0.164 INCHES NOMINAL IN; Fastener Length: 1.631 INCHES MINIMUM AND 1.678 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS 5629 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.397 INCHES NOMINAL IN. 18 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.