JIS1186 High Strength Hex Nuts
JIS B 1186 Hex Nuts are designed for high-strength bolted connections in steel structures, where controlled mechanical performance and secure assembly are essential. Used together with compatible high-strength bolts and washers, these nuts form a complete fastening system for structural connections subjected to significant loads.
The nuts are available in F8 and F10 property classes, with the material and mechanical requirements controlled according to JIS B 1186. Different sizes and surface finishes can be supplied to suit structural connection requirements, including options for outdoor steelwork where additional corrosion protection is required. JIS B 1186 Hex Nuts are commonly used in steel buildings, bridges, transmission structures, industrial steelwork, and other heavy-duty structural assemblies. For proper selection, the nut grade should be matched with the corresponding bolt and washer set, while thread size, surface treatment, and connection requirements should be considered together.


Specification:
JIS B 1186 Hex Nuts are manufactured for high-strength structural bolting assemblies and are specified by their nut property class, dimensions, thread requirements, and mechanical properties. F8 and F10 nuts are available for use with compatible high-strength bolts and washers according to the required connection specification. The nuts can be supplied in suitable steel materials and surface finishes for different structural environments. Plain, zinc-plated, and hot-dip galvanized finishes can be provided according to project requirements.
| Item | Specification |
|---|---|
| Standard | JIS B1186 |
| Product Type | High-Strength Hex Nut |
| Nut Property Class | F8/F10 |
| Material | Carbon Steel/Alloy Steel |
| Thread System | Metric Coarse |
| Thread Standard | JISB 0205/ISO261 Metric Thread |
| Thread Tolerance | 6H |
| Size Range | M12-M30 |
| Surface Treatment | Plain,Zinc Plated, Black Oxidation, Hot-Dip Galvanized |
| Packaging: | Boxes/cartons into wooden pallets |
| MOQ: | 1Ton/Size |
Dimension Chart of JIS1186 Hex Nuts:
The dimension chart provides the key measurements required to select JIS B 1186 Hex Nuts for high-strength structural connections. Nominal diameter, nut height, width across flats, and thread pitch should be matched with the corresponding bolt and washer set to ensure proper fit and assembly.

| Thread Diameter | M12 | M16 | M20 | M22 | M24 | M27 | M30 |
| P | 1.75 | 2 | 2.5 | 2.5 | 3 | 3 | 3.5 |
| k max | 12.35 | 16.35 | 20.4 | 22.4 | 24.4 | 27.4 | 30.4 |
| k min | 11.65 | 15.65 | 19.6 | 21.6 | 23.6 | 26.6 | 29.6 |
| s max | 22 | 27 | 32 | 36 | 41 | 46 | 50 |
| s min | 21.2 | 26.2 | 31 | 35 | 40 | 45 | 49 |
| dw min | 20 | 25 | 29 | 33 | 38 | 43 | 47 |
| e max | 25.4 | 31.2 | 37 | 41.6 | 47.3 | 53.1 | 57.7 |
- RELATED NUT LISTS:
- DIN6334 Hexagon Coupling Nuts
- ASME/ANSI B 18.2.2 Hex Slotted Nuts/Castle Nuts
- ASME/ANSI B18.2.2 Hex Flange Nuts
- Lock Nuts
- IFI145 Flange Nuts
- DIN982 Nylon Lock Nuts
- DIN985 Nylon Lock Nuts
- ASME B 18.16.6 Nylon Nuts
- HEX NUT
- JIS 1186 Hex Nuts
- DIN934 Hex Nuts
- A194 Hex Nuts
- A563 Hex Nuts
- DIN6915 Hex Nuts
- GOST 28919 Thick Hex Nuts
- GOST R 52645 Structural Hex Nuts
- GOST 5915 Hex Nut
- UNI5588 Hex Nuts
- UNI5587 Thick Hex Nuts
- UNI5713 Hex Nuts
- AS1252 Hex Nuts
- AS/NZS 2451 Hex Nuts
- AS/NZS 2465 Hex Nuts
- AS 1112.1 Hex Nut
- DIN6330 Hex Thick Nuts
- ASME/ANSI B 18.2.2 Hex Thick Nuts
Application of JIS1186 High Strength Hex Nuts:
Steel Buildings & Structural Frames
JIS B 1186 Hex Nuts are designed for high-strength structural connections in steel buildings, columns, beams, frames, and fabricated steel structures. They are used together with compatible bolts and washers to form complete structural fastening assemblies.
Bridges & Heavy Steel Structures
These nuts are suitable for bridges, steel supports, industrial structures, and other heavily loaded steel connections where controlled mechanical properties and reliable bolted joints are required. The F8 and F10 property classes can be selected according to the corresponding connection requirements.
Transmission & Infrastructure Structures
JIS B 1186 fastening assemblies can also be used in transmission structures, substations, utility infrastructure, and other large-scale steel frameworks. Different sizes and surface finishes can be supplied to suit structural design and environmental requirements.
