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ASTM A193 B7 Stud Bolt A194 2H Heavy Hex Nut ANSI B18.2.1 ANSI B18.2.2
ASTM A193 B7 Stud Bolt A194 2H Heavy Hex Nut ANSI B18.2.1 ANSI B18.2.2
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ASTM A193 B7 Stud Bolt A194 2H Heavy Hex Nut ANSI B18.2.1  ANSI B18.2.2


A193 B7 A194 2H, A193 B7 Stud Bolt and A194 2H Nuts


Carbon steel/ Alloy steel stud bolt and nuts

Stud Bolt and Nut Material:

 A193 B7/A194 2H;

A193 B7M/A194 2HM;

A320 L7/A194 7;

A320 L7M/A194 7M

A193 B7 A194 2H stud bolt and nuts Surface Treatment: black, cadmium plated, PTFE Coated, Zinc Coated, Hop dip galvanized



Threads of Stud Bolts

Bolts threading are defined in ASME B1.1 Unified Inch Screw Threads, (UN and UNR Thread Form). The most common thread is a symmetrical form with a V-profile. The included angle is 60°. This form is widely used in the Unified thread (UN, UNC, UNF, UNRC, UNRF) form as the ISO / metric threads.
The advantage of a symmetrical threads is that they are easier to produce and inspect compared with non-symmetrical threads. These are typically used in general-purpose fasteners.
Thread series cover designations of diameter/pitch combinations that are measured by the number of threads per inch (TPI) applied to a single diameter.


· Coarse thread series (UNC/UNRC) is the most widely used thread system and applied in most of the screws, bolts and nuts. Coarse threads are used for threads in low strength materials such as iron, mild steel, copper and softer alloy, aluminium, etc.. The coarse thread is also more tolerant in adverse conditions and facilitate quick assembly.

· Fine thread series (UNF/UNRF) is commonly used in precision applications and in there where require a higher tensile strength than the coarse thread series.

· 8 - Thread series (8UN) is the specified thread forming method for several ASTM standards including A193 B7, A193 B8/B8M, and A320. This series is mostly used for diameters one inch and above.