The Bolt,shear, cataloged under National Stock Number 5306-01-025-4826, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-025-4826 |
| Primary Part Number | ST3M553D14-78 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Extended Washer Thickness | 0.188 INCHES MINIMUM AND 0.208 INCHES MAXIMUM IN |
| Head Height | 0.798 INCHES MINIMUM AND 0.818 INCHES MAXIMUM IN |
| Fastener Length | 6.054 INCHES MINIMUM AND 6.084 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | NAS672 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 1.428 INCHES MINIMUM AND 1.438 INCHES MAXIMUM IN |
| Thread Length | 1.169 INCHES MINIMUM AND 1.219 INCHES MAXIMUM IN |
| Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL |
| Shank Unthreaded Hole Diameter | 0.093 INCHES MINIMUM AND 0.098 INCHES MAXIMUM FIRST HOLE IN |
| Nominal Thread Diameter | 0.875 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 76301-ST3-553 MANUFACTURERS STANDARD |
| Grip Length | 4.865 INCHES MINIMUM AND 4.885 INCHES MAXIMUM IN |
| Width Between Flats | 0.934 INCHES MINIMUM AND 0.943 INCHES MAXIMUM IN |
| Grip Diameter | 0.8730 INCHES MINIMUM AND 0.8740 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Minimum Tensile Strength | 180000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 14 |
| Material | STEEL COMP E4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8735 OR STEEL COMP 6150 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 5.908 INCHES MINIMUM AND 5.938 INCHES MAXIMUM FIRST HOLE IN |
| 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 |
|---|---|
| ST3M553D14-78 PRIMARY | The Boeing Company Div Defense (USA) |
NSN 5306-01-025-4826 is a Bolt,shear, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-025-4826 has 1 manufacturer part number on file: ST3M553D14-78 (The Boeing Company Div Defense).
Key specifications for ST3M553D14-78: Extended Washer Thickness: 0.188 INCHES MINIMUM AND 0.208 INCHES MAXIMUM IN; Head Height: 0.798 INCHES MINIMUM AND 0.818 INCHES MAXIMUM IN; Fastener Length: 6.054 INCHES MINIMUM AND 6.084 INCHES MAXIMUM IN; Surface Treatment Document and Classification: NAS672 ASSN STD SINGLE TREATMENT RESPONSE OVERALL. 22 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.