Heavy Hex Nut
Heavy Hex Nut
Heavy Hex Nut
A heavy hex nut is a variation of the standard hex nut but with a larger and thicker size, providing a greater bearing surface and better load distribution. It is designed for use in high-strength and heavy-duty applications.
They are available in multiple grades and finishes.
ASTM A193 Grade B16 Stud Bolts
ASTM A193 Grade B16 stud bolts are high strength fasteners manufactured from heat treated Chromium-Molybdenum-Vanadium steel, quenched and tempered. Added Vanadium allows for operating temperatures higher than that of B7 stud bolts.
Dimensional specifications are governed by ASME B18.31.2. Grade markings consists of both the grade symbol “B16″ and the manufacturer’s identification mark on one end of each stud 3/8″ diameter and larger. Manufacturer’s marking may be placed on other end if insufficient space. Inch series fasteners meeting ASTM A193 Grade B16 specifications are typically used in the power and petrochemical industries on boilers, turbines, and other pressurized equipment with elevated temperatures. ASTM A193 covers the requirements for high temperature and high pressure bolting. A193 B16 all thread studs having diameters above 1” are most common in 8UN thread pitches.
Alloy Steel, AISI 4140/4142 Quenched and Tempered A Heat Treated Chromium Molybdenum Steel Widely Used for Medium High-Temperature Service
ASTM Grade B7 fasteners are steel screws and threaded rods for high-pressure and high-temperature applications. They’re often used to secure pressure tanks, valves, and flanges.
The minimum tensile strength of Grade B7 screws is 100,000 psi. Tensile strength is the most common way to compare across different fastener grades. To maintain strength, mate Grade B7 screws and threaded rods with Grade 7 or Grade 2H extra-wide hex nuts.