Coupling Bolts (Grade 5)

Coupling bolts are manufactured from Grade 5 high-strength carbon steel. The shank length of a coupling bolt is equal to the measured outside diameter of the center pipe of the screw to provide maximum shear area and strength. It is very important to only use the correct coupling bolt for corresponding screw and pipe size.

KWS and Martin Part Numbers Cross Reference »
  • Model
    Number
  • Coupling
    Dia.
  • Outside
    Pipe Dia.
  • Pipe Size
    (Sch 40)
  • Bolt Size
  • Weight
    (Lbs.)
  • Lock Nut
    Only
    • CB1114

    • 1”
    • 1 5/8”
    • 1-1/4”
    • 3/8” X 2 1/6”
    • 0.13
    • LN38ZP
    • CB1122

    • 1 1/2”
    • 2-3/8”
    • 2”
    • 1/2” X 3”
    • 0.32
    • LN12ZP
    • CB2212

    • 2”
    • 2-7/8”
    • 2-1/2”
    • 5/8” X 3 5/8”
    • 0.56
    • LN58ZP
    • CB27163

    • 2 7/16”
    • 3-1/2”
    • 3”
    • 5/8” X 4 3/8”
    • 0.63
    • LN58ZP
    • CB3312

    • 3”
    • 4”
    • 3-1/2”
    • 3/4” X 5”
    • 0.91
    • LN34ZP
    • CB34

    • 3”
    • 4-1/2”
    • 4”
    • 3/4” X 5 1/2”
    • 1.05
    • LN34ZP
    • CB37164

    • 3 7/16”
    • 4-1/2”
    • 4”
    • 7/8” X 5 1/2”
    • 1.59
    • LN78ZP