Stud Bolts


  • Double Ends
  • Tap Ends
  • Combinations
  • Single Ends
  • All Threads  Collars  Specials

Bent Bolts

  • Eye Bolts
  • Anchor Bolts
  • U-Bolts
  • Rod End Bolts
  • J-Bolts
  • Specials
  • Indicator Bolts


  • Heavy Hex
  • Finished Hex
  • Jam
  • Coupling
  • Slotted
  • Square
  • Specials


Ferritic Steel

ASTM A193,B7, B7M  B16, B5  ASTM A320 L7, L7M  L43

Austenitic Steel

ASTM A 193 B8 & B8M Class I & 2 B8A  B8MA, B8T ASTM A320 B8 & B8M  Class 1 & 2 B8A B8MA


Grade 660  Monel  Inconel  Hastelloy  Alloy 20  Brass Titanium

Nut Materials

ASTM A 194 Grade 2H 2HM, 4 ,7, 3, 6, 8, 8M, 8A, 8MA

Indicator Bolts

The function of the indicator Stud bolt is to evidence at all times the dynamic stresses that it undergoes and if these stresses are within the limits of the design of the system. The values that are verified are the length variations of the torque element; this variation is a direct relation of the following two parameters:

  • Temperature
  • Pressure

Indicator studbolts can be made in low-alloy,austentic,ferritic steels,duplex and superduplex grades, in relation to the ambient conditions.

For alloy steel studbolts it is best to use for the indicator rods materials such as Alloy C-276 whose K coefficient is similar if not the same to that of the material used for the studbolt.