System of Measurement System of Measurement |
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Thread Size Thread Size | Show |
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Fastener Strength Grade/Class Fastener StrengthGrade/Class |
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Material Material |
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Thread Direction Thread Direction |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Hex Nut Profile Hex Nut Profile |
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Standard | Extra Wide |
RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Drive Style Drive Style |
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Threading Threading |
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![]() | Fully Threaded |
Finish Finish |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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Locking Type Locking Type |
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![]() | Nylon Insert |
Tensile Strength Tensile Strength |
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About Threaded Studs and Rods
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About Nuts, Materials, and Finishes
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How to Install Helical Inserts
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About Helical Insert Length
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Extreme-Strength Steel Extra-Wide Hex Nuts—Grade 2H


Also known as heavy hex nuts, these nuts are about 10% wider and taller than standard hex nuts and distribute the load over a large area. Grade 2H nuts are comparable in strength to Grade 9 bolts. They're about 20% stronger than high-strength steel nuts and are used in heavy machinery, such as earth-moving equipment.
PTFE-coated steel nuts have a slippery surface to resist sticking during installation. They're resistant to chemicals and salt water.
For technical drawings and 3-D models, click on a part number.
Super-Corrosion-Resistant 316 Stainless Steel
Extra-Wide Hex Nuts for High-Pressure Applications


These nuts have excellent chemical resistance and can be used in saltwater environments. They're able to maintain their strength in high-pressure and high-temperature environments and are used with ASTM A193 bolts to fasten pressure tanks, valves, and flanges. Also known as heavy hex nuts, they are about 10% wider and taller than standard hex nuts and distribute the load over a large area. Nuts may be mildly magnetic.
For technical drawings and 3-D models, click on a part number.
Thread Size | Wd. | Ht. | Specifications Met | Pkg. Qty. | Pkg. | |
316 Stainless Steel—ASTM Grade 8M | ||||||
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1 3/4"-8 | 2 3/4" | 1 3/4" | ASTM A194 | 1 | 000000000 | 000000 |
High-Strength Steel Nylon-Insert Locknuts—Grade 8


A nylon insert grips the bolt to resist loosening without damaging threads. These nuts are reusable, but their holding power lessens with each use. Made from Grade 8 steel, they're about 25% stronger than medium-strength steel locknuts.
Steel locknuts without a finish are ready to be painted or finished.
Zinc yellow-chromate plated steel locknuts resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
Medium-Strength Steel Threaded Rods—Grade B7

These Grade B7 threaded rods meet the pressure and temperature requirements of ASTM A193 and are often used to secure pressure tanks, valves, and flanges.
For technical drawings and 3-D models, click on a part number.
Stainless Steel Helical Inserts

Also known as Heli-Coil inserts, these inserts have coils that expand once installed to securely anchor the insert. All have a prong for ease of installation. An installation tool grips the prong and reduces the coil diameter, enabling the insert to fit in tapped holes. Remove the prong to insert the screw. Installation requires a drill bit, a helical insert tap, an installation tool, and a prong break-off tool.
For technical drawings and 3-D models, click on a part number.