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Mild Steel (MS) Hexagonal Bolts | Traditional 1 Line to 6 Line (Sut) Sizes | Ductile Low-Carbon Steel Fasteners for General Fabrication and Ironwork
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MS Bolts measured in "Lines" (or Suts) are the foundational mechanical fasteners for the traditional fabrication and construction industries in Nepal. Manufactured from low-carbon mild steel, these bolts are valued for their ductility, which allows them to absorb shocks without brittle failure. The structural logic of the "Line" system follows 1/8th-inch increments (1 Sut = 1/8"), making this range (1 Line to 6 Line) cover diameters from 1/8" to 3/4". These bolts feature a cold-forged hexagonal head and are typically paired with BSW (British Standard Whitworth) or UNC threads. They are the primary unit for securing wooden door frames, assembling iron window grills, and mounting agricultural equipment where the precision of high-tensile metric bolts is not required.
|
Size in Lines (Suts) |
Equivalent Inch Diameter |
Typical Applications |
|
1 Line |
1/8" |
Small mechanical repairs, crafts |
|
2 Lines |
1/4" |
Furniture assembly, light sheet metal |
|
3 Lines |
3/8" |
Window grills, light door frames |
|
4 Lines |
1/2" |
Main gate hinges, steel angle joinery |
|
5 Lines |
5/8" |
Agricultural tools, heavy machinery mounts |
|
6 Lines |
3/4" |
Medium structural beams, truck body work |
- Accurate Sut-Sizing Logic: Specifically manufactured to match the 1/8" (1 Line) to 3/4" (6 Line) standards used by local fabricators and hardware distributors across Nepal.
- Ductile Material Strength: Made from high-quality mild steel that offers excellent resistance to snapping, allowing for slight deformation under stress—ideal for timber-to-steel joints.
- Cold-Forged Hex Head: Features a robust six-sided head designed for high-grip contact with traditional wrenches, ensuring high-torque tightening without stripping.
- Precision Inch-Series Threads: External threads are cut to standard BSW/UNC patterns, ensuring seamless compatibility with 1 Line to 6 Line MS nuts and tapped holes.
- Anti-Corrosive Finish Options: Available in standard Black (Self-Finish) for indoor use or Zinc-Plated (Galvanized) for gates, grills, and outdoor structural repairs.
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