TTBOLT is a manufacturer and supplier of industrial fasteners, specializing in high-quality bolts, nuts, washers and custom fastening solutions.
Our products are manufactured according to international standards including DIN, ISO, ASTM and ASME , serving industries such as construction, oil & gas, petrochemical, mining, power generation, heavy machinery and infrastructure projects.
Our Product Range
Hex Bolts
Heavy Hex Bolts
Hex Flange Bolts
Socket Head Cap Screws
Hex Nuts & Heavy Hex Nuts
Flat Washers & Spring Washers
Custom Fasteners
Why TTBOLT?
Manufactured to international standards
Metric and Inch sizes
Carbon Steel, Alloy Steel and Stainless Steel
Various property classes and grades
Multiple surface finishes
Custom manufacturing based on customer drawings
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ASME B18.21.1 Regular Helical Spring-Lock Washer Nominal size: 1-3/8 in Inside diameter: 1.379–1.408 in Maximum outside diameter: 2.219 in Minimum mean section thickness: 0.344 in Minimum section width: 0.391 in Minimum bearing width: 0.274 in Material: Carbon Steel Finish: Plain Theoretical mass: 99.365 g/pc
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ASME B18.21.1 Regular Helical Spring-Lock Washer Nominal size: 15/16 in Inside diameter: 0.941–0.958 in Maximum outside diameter: 1.556 in Minimum mean section thickness: 0.234 in Minimum section width: 0.281 in Minimum bearing width: 0.197 in Material: Stainless Steel Finish: Plain Theoretical mass: 34.226 g/pc
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ASME B18.21.1 Regular Helical Spring-Lock Washer Nominal size: 1-5/16 in Inside diameter: 1.317–1.344 in Maximum outside diameter: 2.133 in Minimum mean section thickness: 0.328 in Minimum section width: 0.375 in Minimum bearing width: 0.262 in Material: Stainless Steel Finish: Plain Theoretical mass: 88.277 g/pc
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ASME B18.21.1 Regular Helical Spring-Lock Washer Nominal size: 15/16 in Inside diameter: 0.941–0.958 in Maximum outside diameter: 1.556 in Minimum mean section thickness: 0.234 in Minimum section width: 0.281 in Minimum bearing width: 0.197 in Material: Carbon Steel Finish: Zinc Plated Theoretical mass: 33.881 g/pc
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ASME B18.21.1 Regular Helical Spring-Lock Washer Nominal size: 1-5/16 in Inside diameter: 1.317–1.344 in Maximum outside diameter: 2.133 in Minimum mean section thickness: 0.328 in Minimum section width: 0.375 in Minimum bearing width: 0.262 in Material: Carbon Steel Finish: Zinc Plated Theoretical mass: 87.387 g/pc
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ASME B18.21.1 Regular Helical Spring-Lock Washer Nominal size: 15/16 in Inside diameter: 0.941–0.958 in Maximum outside diameter: 1.556 in Minimum mean section thickness: 0.234 in Minimum section width: 0.281 in Minimum bearing width: 0.197 in Material: Carbon Steel Finish: Plain Theoretical mass: 33.881 g/pc
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ASME B18.21.1 Regular Helical Spring-Lock Washer Nominal size: 1-5/16 in Inside diameter: 1.317–1.344 in Maximum outside diameter: 2.133 in Minimum mean section thickness: 0.328 in Minimum section width: 0.375 in Minimum bearing width: 0.262 in Material: Carbon Steel Finish: Plain Theoretical mass: 87.387 g/pc
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ASME B18.21.1 Regular Helical Spring-Lock Washer Nominal size: 1-5/8 in Inside diameter: 1.633–1.663 in Maximum outside diameter: 2.553 in Minimum mean section thickness: 0.389 in Minimum section width: 0.424 in Minimum bearing width: 0.297 in Material: Stainless Steel Finish: Plain Theoretical mass: 143.356 g/pc