The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-485-5861, 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 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-485-5861 |
| Primary Part Number | S397-6-16 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Head Height | 0.219 INCHES NOMINAL IN |
| Fastener Length | 1.500 INCHES MINIMUM AND 1.547 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS 5629 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.516 INCHES NOMINAL IN |
| Criticality Code Justification | AGAV |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | SPLINE DRIVE SHEAR HEAD |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN |
| Head Minor Diameter | 0.668 INCHES MINIMUM AND 0.679 INCHES MAXIMUM IN |
| Grip Diameter | 0.546 INCHES MINIMUM AND 0.574 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| 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 |
|---|---|
| S397-6-16 PRIMARY | Huck International, Inc (USA) |
| 122896-6-16 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M747-6-16 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M747-6-16 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M747-6-16 | Houston Precision Fasteners I Lp (USA) |
| HP7747-6-16 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| PBF1266-6-16 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| AIC688-6-16 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| VCG0002-6-16 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| MB155-6-16 PRIMARY | Hi-Shear Corporation (USA) |
| GS1031-6-16 PRIMARY | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| SLB254-6-16 PRIMARY | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| Reference | Meaning |
|---|---|
| 122896-6-16 | 5/9 Secondary reference Sps Technologies Inc |
| 122896-6-16 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-485-5861 is a Bolt,close Tolerance, manufactured by Huck International, Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-485-5861 has 12 manufacturer part numbers on file: S397-6-16 (Huck International, Inc), 122896-6-16 (Sps Technologies, Llc Dba PB Fasteners), ST3M747-6-16 (Fastener Innovation Technology, Inc. Dba F I T), ST3M747-6-16 (The Boeing Company Div Defense), ST3M747-6-16 (Houston Precision Fasteners I Lp) and 7 more.
Key specifications for S397-6-16: Head Height: 0.219 INCHES NOMINAL IN; Fastener Length: 1.500 INCHES MINIMUM AND 1.547 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS 5629 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.516 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.