The world’s standard theatrical lighting c clamp, the Mega-Clamp, is created from high tensile, aircraft grade, extruded aluminum. The Mega-Clamp's 600 pound design load is twice as strong as most cast iron clamps. In 1993, the Mega-Clamp was introduced to the industry. Microgrooves on the one-piece solid clamp body grip the pipe securely, preventing the fixture from rocking. With 600 lbs. of spring load when compressed, the Belleville spring washer keeps the fixture from drifting after small pan adjustments are made. Usually a wrench is not needed to tighten the pan bolt after minor adjustments. The Mega-Clamp fits from 1” pipe to 2” pipe (1-1/4” OD tube to 2.5” OD tube). Download Spec Sheet (PDF) Minimum Size 1" pipe, 1.315" OD Maximum Size 2" pipe, 2.5" OD Working Load Limit 600 lb 273 kg Hardware 1/2" x 1" long hex head Grade 5 zinc bolt 1/2" x 3" long square head set screw Belleville spring washer Dimensions 5.875" tall x 3.675" wide x 1" thick Weight 13.4 oz (MAB3/8 - .85 lbs.) Case Quantities 48 Order Codes MAB Mega-Clamp, Black Anodized MAM Mega-Clamp, Silver MAB-Z Mega-Clamp with Zinc Bolt, Black Anodized MAB2 Mega-Clamp with 2" Long Bottom Bolt, Black Anodized MAB2.5 Mega-Clamp with 2.5" Long Bottom Bolt, Black Anodized MAB3/8 Mega-Clamp with 3/8" Bottom Bolt, Black Anodized MAB3/8S Mega-Clamp with 3/8" Bottom Bolt, Stainless Steel Hardware, Black Anodized MAB5/16 Mega-Clamp with 5/16" Bottom Bolt , Black Anodized MABA Mega-Clamp with Atlas Threads, Black Anodized MABS Mega-Clamp with Stainless Steel Hardware, Black Anodized MAM3/8 Mega-Clamp with 3/8" Bottom Bolt, Silver MAMS Mega-Clamp with Stainless Steel Hardware, Silver MAW Mega-Clamp, White Powder Coat