EFC International
EFC International
1940 Craigshire St. Louis,
MO 63146-4008
Phone: 1 314.434.28881
Contact: www.efc-intl.com/contact
Website: www.efc-intl.com
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These 1/2" Power-Seal® Worm Gear Clamps are made of high quality stainless steel. The interlocking "square knot" design will not pull apart. This design enables higher sealing pressure even at lower applied torque ranges, such as installing with a screwdriver. Power-Seal Clamps are general purpose and suited for heater and coolant hoses, as well as air intake & bilge pump lines in corrosive and non-corrosive environments. They are available in a variety of stainless steel grades and finishes with 5/16 slotted hex head screw.
Power-Seal® Worm Gear Clamps
Unit of Measure
1 2 3 

Item #

Item Name

Screw Material

Minimum Clamp Size

Maximum Clamp Size

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15B000142-316M N/A Power-Seal® 0.437 Inch (in) Minimum Size Worm Gear Clamp N/A 316 Stainless Steel (SS) N/A 0.437 in11.00 mm N/A 0.781 in20 mm
15B000142-3005M N/A Power-Seal® 0.437 Inch (in) Minimum Size Worm Gear Clamp N/A 305 Stainless Steel (SS) N/A 0.437 in11.00 mm N/A 0.781 in20 mm
15B000143-316M N/A Power-Seal® 0.500 Inch (in) Minimum Size Worm Gear Clamp N/A 316 Stainless Steel (SS) N/A 0.500 in13.00 mm N/A 0.906 in23.00 mm
15B000143-3005M N/A Power-Seal® 0.500 Inch (in) Minimum Size Worm Gear Clamp N/A 305 Stainless Steel (SS) N/A 0.500 in13.00 mm N/A 0.906 in23.00 mm
15B000144-316M N/A Power-Seal® 0.562 Inch (in) Minimum Size Worm Gear Clamp N/A 316 Stainless Steel (SS) N/A 0.562 in14.00 mm N/A 1.063 in27 mm
15B000144-3005M N/A Power-Seal® 0.562 Inch (in) Minimum Size Worm Gear Clamp N/A 305 Stainless Steel (SS) N/A 0.562 in14.00 mm N/A 1.063 in27 mm
15B000145-316M N/A Power-Seal® 0.687 Inch (in) Minimum Size Worm Gear Clamp N/A 316 Stainless Steel (SS) N/A 0.687 in17.00 mm N/A 1.250 in32 mm
15B000145-3005M N/A Power-Seal® 0.687 Inch (in) Minimum Size Worm Gear Clamp N/A 305 Stainless Steel (SS) N/A 0.687 in17.00 mm N/A 1.250 in32 mm
15B000146-3005M N/A Power-Seal® 0.812 Inch (in) Minimum Size Worm Gear Clamp N/A 305 Stainless Steel (SS) N/A 0.812 in21.00 mm N/A 1.500 in38.00 mm
15B000147-3005M N/A Power-Seal® 0.812 Inch (in) Minimum Size Worm Gear Clamp N/A 305 Stainless Steel (SS) N/A 0.812 in21.00 mm N/A 1.750 in44.00 mm
15B000146-316M N/A Power-Seal® 0.812 Inch (in) Minimum Size Worm Gear Clamp N/A 316 Stainless Steel (SS) N/A 0.812 in21.00 mm N/A 1.500 in38.00 mm
15B000147-316M N/A Power-Seal® 0.812 Inch (in) Minimum Size Worm Gear Clamp N/A 316 Stainless Steel (SS) N/A 0.812 in21.00 mm N/A 1.750 in44.00 mm
15B000148-316M N/A Power-Seal® 1.062 Inch (in) Minimum Size Worm Gear Clamp N/A 316 Stainless Steel (SS) N/A 1.062 in27.00 mm N/A 2.000 in51.00 mm
15B000148-3005M N/A Power-Seal® 1.062 Inch (in) Minimum Size Worm Gear Clamp N/A 305 Stainless Steel (SS) N/A 1.062 in27.00 mm N/A 2.000 in51.00 mm
15B000149-316M N/A Power-Seal® 1.312 Inch (in) Minimum Size Worm Gear Clamp N/A 316 Stainless Steel (SS) N/A 1.312 in33.00 mm N/A 2.25 in57.00 mm
15B000149-3005M N/A Power-Seal® 1.312 Inch (in) Minimum Size Worm Gear Clamp N/A 305 Stainless Steel (SS) N/A 1.312 in33.00 mm N/A 2.25 in57.00 mm
15B000150-316M N/A Power-Seal® 1.562 Inch (in) Minimum Size Worm Gear Clamp N/A 316 Stainless Steel (SS) N/A 1.562 in40 mm N/A 2.500 in64.00 mm
15B000150-3005M N/A Power-Seal® 1.562 Inch (in) Minimum Size Worm Gear Clamp N/A 305 Stainless Steel (SS) N/A 1.562 in40 mm N/A 2.500 in64.00 mm
15B000151-316M N/A Power-Seal® 1.812 Inch (in) Minimum Size Worm Gear Clamp N/A 316 Stainless Steel (SS) N/A 1.812 in46.00 mm N/A 2.750 in70 mm
15B000151-3005M N/A Power-Seal® 1.812 Inch (in) Minimum Size Worm Gear Clamp N/A 305 Stainless Steel (SS) N/A 1.812 in46.00 mm N/A 2.750 in70 mm
15B000159-316M N/A Power-Seal® 1.875 Inch (in) Minimum Size Worm Gear Clamp N/A 316 Stainless Steel (SS) N/A 1.875 in48.00 mm N/A 5.000 in127.00 mm
15B000159-3005M N/A Power-Seal® 1.875 Inch (in) Minimum Size Worm Gear Clamp N/A 305 Stainless Steel (SS) N/A 1.875 in48.00 mm N/A 5.000 in127.00 mm
15B000152-316M N/A Power-Seal® 2.062 Inch (in) Minimum Size Worm Gear Clamp N/A 316 Stainless Steel (SS) N/A 2.062 in52.00 mm N/A 3.000 in76.00 mm
15B000152-3005M N/A Power-Seal® 2.062 Inch (in) Minimum Size Worm Gear Clamp N/A 305 Stainless Steel (SS) N/A 2.062 in52.00 mm N/A 3.000 in76.00 mm
15B000153-316M N/A Power-Seal® 2.312 Inch (in) Minimum Size Worm Gear Clamp N/A 316 Stainless Steel (SS) N/A 2.312 in59.00 mm N/A 3.250 in83.00 mm
Unit of Measure
1 2 3