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CL6690 (G-48 – SILVER) CL3809 (G-48B - BLACK) FIBERGLASS W/TOOLBOX


The GCI G-48 truck cap/lid clamp is a 1 3/8" aluminum cam lid mounting clamp that comes assembled with a silver or black finish and mounts fiberglass truck caps or tonneau covers with toolboxes.

GCI Mounting Clamp G-48 Will not work on Tacoma or Alum. Cap w/Toolbox. But will fit most other applications with a toolbox.

  • This style of clamp installs easily. Usually, can be installed without disassembling the clamp.
  • Do not overtighten your clamp. Maximum Torque not to exceed. 80-inch pounds of torque, 6.67-foot pounds of torque.
  • Recommended to tighten all clamps monthly, and that at least 4 clamps be utilized on short bed installations and at least 6 clamps be utilized on long bed installations.


Specifications from the figure above

A: (Clamping Range) 0 to 1” Jaw Opening

B: (Clamp Major Reach) 2"

C: (Clamp Minor Reach) 1 3/8”

D: …... 7/8”