The Monstro-Clamp 4″ fastens to those really big (2 3/8″ OD to 4″ OD) pipes. CNC cut from a solid one inch thick aluminum plate. 1/2″ × 4″ square head bolt.

Specifications:

• Minimum Size: 2″ pipe, 2.375″ OD
• Maximum Size: 3.5″ pipe, 4″ OD
• Safe Vertical Working Load: 250 lbs
• Hardware:
  • 1/2″ × 1″ hex head bolt for fastening fixture
  • 1/2″ × 4″ square head set screw to fasten to pipe

Spec_Sheet_4460_File_1.pdf
Quick_Reference_Guide_4394_File_1.pdf