DIN 975  ASTM A193 Bolts Studs Bar Rod All Thread Pole Galvanized Stainless Steel Threaded Rods

 
The ASTM A194 specification covers a variety of carbon, alloy, and stainless steel nuts. Ranging in sizes ¼ through 4 inches, 2H nuts are intended for high-pressure or high-temperature applications in a plain (uncoated) finish. To identify A194 nuts, note the 2H on the nut’s face. A194 2H nuts can be coated. Zinc coated nuts will have a ZN marked after the grade (example: 2HZN). A194 2H nuts are often paired with A193 B7 steel or F1554-105 steel, typically as all thread studs, hex bolts, or double end rods. Often, you will find these nuts in high strength applications in fields including oil and gas.
 

Nuts to be used on bolts with Class 2A threads before hot-dip zinc coating ,and then hot-dip zinc coated in accordance with Specification F2329, shall be tapped oversize after coating, to the minimum and maximum thread dimensions in Table 5. The major and minor diameters shall also be increased by the allowance to provide the corresponding minimum and maximum major an minor diameter.

 
Using domestic materials 4140 alloy steel, mesh belt furnace or medium frequency furnace heat treatment processing of high strength products, high temperature resistance, products are widely used in oil, power plants, offshore exploration, tower and various high temperature resistance environment,
 
TENSILE STRENGTH ≥860/mm2
YIELD STRENGTH ≥720/mm2
ELONGATION ≥16%
REDUCE ≥50%
TEMPERING ≥593℃
QUENCHING 850-950℃
HARDNESS ≤35HRC
 
 
Specifications greater than or equal to 2-3 / 4 in
 
TENSILE STRENGTH ≥795/mm2
YIELD STRENGTH ≥853/mm2
ELONGATION ≥16%
REDUCE ≥50%
TEMPERING ≥593℃
QUENCHING 880-930℃
HARDNESS ≤35HRC