Keystone Fastening Technologies
Keystone Fastening Technologies
114 VIP Drive, Wexford, PA 15090
Phone: 1.800.659.5972
Email: info@keystonefastening.com
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Wiring and Tube Clamps (Medium Duty)
Clamping Diameters range from 0.187" - 4.00"
Bolt Hole Diameters include 0.203", 0.281", 0.343", 0.406", 0.468", 0.531"
Materials/finishes available include G90 galvanized steel, stainless steel and aluminum
Cushion Materials include general purpose EPDM and Silicone
Aluminum available from .187" - 2.00" clamping diameter in 09 series

Call for pricing.
COL Clamps - Photo
Unit of Measure
1 2 3 4 5 

Item #

Clamping Diameter (D)

Hole Diameter (H) ±.005

Width (W) ±.010

Hole Center To End (E) ±.015

Center To Center (L) ±.031

Slot Length (S) ±.020

Gage ± .002

COL-3017 N/A 1.875 " N/A 0.531 " N/A 1.000 " N/A 0.562 " N/A 1.656 " N/A 0.625 " N/A 0.048 "
COL-3109 N/A 1.937 " N/A 0.281 " N/A 0.500 " N/A 0.312 " N/A 1.437 " N/A 0.375 " N/A 0.048 "
COL-3111 N/A 1.937 " N/A 0.343 " N/A 0.625 " N/A 0.375 " N/A 1.500 " N/A 0.437 " N/A 0.048 "
COL-3113 N/A 1.937 " N/A 0.406 " N/A 0.750 " N/A 0.437 " N/A 1.562 " N/A 0.500 " N/A 0.048 "
COL-3115 N/A 1.937 " N/A 0.468 " N/A 0.750 " N/A 0.500 " N/A 1.625 " N/A 0.562 " N/A 0.048 "
COL-3117 N/A 1.937 " N/A 0.531 " N/A 1.000 " N/A 0.562 " N/A 1.687 " N/A 0.625 " N/A 0.048 "
COL-3209 N/A 2.000 " N/A 0.281 " N/A 0.500 " N/A 0.312 " N/A 1.500 " N/A 0.375 " N/A 0.048 "
COL-3211 N/A 2.000 " N/A 0.343 " N/A 0.625 " N/A 0.375 " N/A 1.562 " N/A 0.437 " N/A 0.048 "
COL-3213 N/A 2.000 " N/A 0.406 " N/A 0.750 " N/A 0.437 " N/A 1.625 " N/A 0.500 " N/A 0.048 "
COL-3215 N/A 2.000 " N/A 0.468 " N/A 0.750 " N/A 0.500 " N/A 1.687 " N/A 0.562 " N/A 0.048 "
COL-3217 N/A 2.000 " N/A 0.531 " N/A 1.000 " N/A 0.562 " N/A 1.750 " N/A 0.625 " N/A 0.048 "
COL-3309 N/A 2.062 " N/A 0.281 " N/A 0.500 " N/A 0.312 " N/A 1.531 " N/A 0.375 " N/A 0.048 "
COL-3311 N/A 2.062 " N/A 0.343 " N/A 0.625 " N/A 0.375 " N/A 1.593 " N/A 0.437 " N/A 0.048 "
COL-3313 N/A 2.062 " N/A 0.406 " N/A 0.750 " N/A 0.437 " N/A 1.656 " N/A 0.500 " N/A 0.048 "
COL-3315 N/A 2.062 " N/A 0.468 " N/A 0.750 " N/A 0.500 " N/A 1.718 " N/A 0.562 " N/A 0.048 "
COL-3317 N/A 2.062 " N/A 0.531 " N/A 1.000 " N/A 0.562 " N/A 1.781 " N/A 0.625 " N/A 0.048 "
COL-3409 N/A 2.125 " N/A 0.281 " N/A 0.500 " N/A 0.312 " N/A 1.562 " N/A 0.375 " N/A 0.048 "
COL-3411 N/A 2.125 " N/A 0.343 " N/A 0.625 " N/A 0.375 " N/A 1.625 " N/A 0.437 " N/A 0.048 "
COL-3413 N/A 2.125 " N/A 0.406 " N/A 0.750 " N/A 0.437 " N/A 1.688 " N/A 0.500 " N/A 0.048 "
COL-3415 N/A 2.125 " N/A 0.468 " N/A 0.750 " N/A 0.500 " N/A 1.750 " N/A 0.562 " N/A 0.048 "
COL-3417 N/A 2.125 " N/A 0.531 " N/A 1.000 " N/A 0.562 " N/A 1.812 " N/A 0.625 " N/A 0.048 "
COL-3509 N/A 2.187 " N/A 0.281 " N/A 0.500 " N/A 0.312 " N/A 1.593 " N/A 0.375 " N/A 0.048 "
COL-3511 N/A 2.187 " N/A 0.343 " N/A 0.625 " N/A 0.375 " N/A 1.656 " N/A 0.437 " N/A 0.048 "
COL-3513 N/A 2.187 " N/A 0.406 " N/A 0.750 " N/A 0.437 " N/A 1.718 " N/A 0.500 " N/A 0.048 "
COL-3515 N/A 2.187 " N/A 0.468 " N/A 0.750 " N/A 0.500 " N/A 1.781 " N/A 0.562 " N/A 0.048 "
COL-3517 N/A 2.187 " N/A 0.531 " N/A 1.000 " N/A 0.562 " N/A 1.844 " N/A 0.625 " N/A 0.048 "
COL-3609 N/A 2.250 " N/A 0.281 " N/A 0.500 " N/A 0.312 " N/A 1.625 " N/A 0.375 " N/A 0.048 "
COL-3611 N/A 2.250 " N/A 0.343 " N/A 0.625 " N/A 0.375 " N/A 1.687 " N/A 0.437 " N/A 0.048 "
COL-3613 N/A 2.250 " N/A 0.406 " N/A 0.750 " N/A 0.437 " N/A 1.750 " N/A 0.500 " N/A 0.048 "
COL-3615 N/A 2.250 " N/A 0.468 " N/A 0.750 " N/A 0.500 " N/A 1.812 " N/A 0.562 " N/A 0.048 "
COL-3617 N/A 2.250 " N/A 0.531 " N/A 1.000 " N/A 0.562 " N/A 1.875 " N/A 0.625 " N/A 0.048 "
COL-3809 N/A 2.375 " N/A 0.281 " N/A 0.500 " N/A 0.312 " N/A 1.687 " N/A 0.375 " N/A 0.048 "
COL-3811 N/A 2.375 " N/A 0.343 " N/A 0.625 " N/A 0.375 " N/A 1.750 " N/A 0.437 " N/A 0.048 "
COL-3813 N/A 2.375 " N/A 0.406 " N/A 0.750 " N/A 0.437 " N/A 1.812 " N/A 0.500 " N/A 0.048 "
COL-3815 N/A 2.375 " N/A 0.468 " N/A 0.750 " N/A 0.500 " N/A 1.875 " N/A 0.562 " N/A 0.048 "
COL-3817 N/A 2.375 " N/A 0.531 " N/A 1.000 " N/A 0.562 " N/A 1.937 " N/A 0.625 " N/A 0.048 "
COL-4009 N/A 2.500 " N/A 0.281 " N/A 0.500 " N/A 0.312 " N/A 1.750 " N/A 0.375 " N/A 0.048 "
COL-4011 N/A 2.500 " N/A 0.343 " N/A 0.625 " N/A 0.375 " N/A 1.812 " N/A 0.437 " N/A 0.048 "
COL-4013 N/A 2.500 " N/A 0.406 " N/A 0.750 " N/A 0.437 " N/A 1.875 " N/A 0.500 " N/A 0.048 "
COL-4015 N/A 2.500 " N/A 0.468 " N/A 0.750 " N/A 0.500 " N/A 1.937 " N/A 0.562 " N/A 0.048 "
COL-4017 N/A 2.500 " N/A 0.531 " N/A 1.000 " N/A 0.562 " N/A 2.000 " N/A 0.625 " N/A 0.048 "
COL-4209 N/A 2.625 " N/A 0.281 " N/A 0.500 " N/A 0.312 " N/A 1.812 " N/A 0.375 " N/A 0.048 "
COL-4211 N/A 2.625 " N/A 0.343 " N/A 0.625 " N/A 0.375 " N/A 1.875 " N/A 0.437 " N/A 0.048 "
COL-4213 N/A 2.625 " N/A 0.406 " N/A 0.750 " N/A 0.437 " N/A 1.937 " N/A 0.500 " N/A 0.048 "
COL-4215 N/A 2.625 " N/A 0.468 " N/A 0.750 " N/A 0.500 " N/A 2.000 " N/A 0.562 " N/A 0.048 "
COL-4217 N/A 2.625 " N/A 0.531 " N/A 1.000 " N/A 0.562 " N/A 2.062 " N/A 0.625 " N/A 0.048 "
COL-4409 N/A 2.750 " N/A 0.281 " N/A 0.500 " N/A 0.312 " N/A 1.875 " N/A 0.375 " N/A 0.048 "
COL-4411 N/A 2.750 " N/A 0.343 " N/A 0.625 " N/A 0.375 " N/A 1.937 " N/A 0.437 " N/A 0.048 "
COL-4413 N/A 2.750 " N/A 0.406 " N/A 0.750 " N/A 0.437 " N/A 2.000 " N/A 0.500 " N/A 0.048 "
COL-4415 N/A 2.750 " N/A 0.468 " N/A 0.750 " N/A 0.500 " N/A 2.062 " N/A 0.562 " N/A 0.048 "
Unit of Measure
1 2 3 4 5