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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Pre-Opened Constant Tension Bands are the ideal fasteners for hose-spigot connections which are subject to extreme temperature changes, or which tend to "slip away" under pressure of the clamp. This version is secured by a small plastic clip. After slipping the clamp onto the hose, this clip can be easily removed by hand. Pre-opened, (and if desired, pre-positioned on the hose) these spring band clamps are quick to assemble and easy to install. Their integrated spring retaining mechanism provides a continuously readjusting dynamic tightening effect. They are available in band widths of 12 and 15 mm and will accommodate nominal diameters from 13 up to 80 mm.
Pre-Opened Constant Tension Band Clamps
Unit of Measure
1 2 3 4 

Item #

Item Name

Band Width (Decimal)

Nominal Diameter (Decimal)

Expanded Diameter

15N0000190-MC104Q N/A 51.00 Millimeter (mm) Nominal Diameter Pre-Opened Constant Tension Band Clamp N/A 0.591 in15.00 mm N/A 2.008 in51 mm N/A 2.126 in54.00 mm
15N0000191-MC104Q N/A 53.00 Millimeter (mm) Nominal Diameter Pre-Opened Constant Tension Band Clamp N/A 0.591 in15.00 mm N/A 2.087 in53 mm N/A 2.205 in56.00 mm
15N0000192-MC104Q N/A 55.00 Millimeter (mm) Nominal Diameter Pre-Opened Constant Tension Band Clamp N/A 0.591 in15.00 mm N/A 2.165 in55 mm N/A 2.283 in58.00 mm
15N000387-MC104Q N/A 30.00 Millimeter (mm) Nominal Diameter Pre-Opened Constant Tension Band Clamp N/A 0.472 in12.00 mm N/A 1.181 in30 mm N/A 1.280 in32.50 mm
15N000388-MC104Q N/A 25.00 Millimeter (mm) Nominal Diameter Pre-Opened Constant Tension Band Clamp N/A 0.472 in12.00 mm N/A 0.984 in25 mm N/A 1.063 in27.00 mm
15N000389-MC104Q N/A 37.00 Millimeter (mm) Nominal Diameter Pre-Opened Constant Tension Band Clamp N/A 0.472 in12.00 mm N/A 1.457 in37.00 mm N/A
15N000390-MC104Q N/A 41.00 Millimeter (mm) Nominal Diameter Pre-Opened Constant Tension Band Clamp N/A 0.472 in12.00 mm N/A 1.614 in41 mm N/A
15N000391-MC104Q N/A 49.00 Millimeter (mm) Nominal Diameter Pre-Opened Constant Tension Band Clamp N/A 0.472 in12.00 mm N/A 1.929 in49 mm N/A
15N000392-MC104Q N/A 51.00 Millimeter (mm) Nominal Diameter Pre-Opened Constant Tension Band Clamp N/A 0.472 in12.00 mm N/A 2.008 in51 mm N/A 2.126 in54.00 mm
15N000393-MC104Q N/A 65.00 Millimeter (mm) Nominal Diameter Pre-Opened Constant Tension Band Clamp N/A 0.472 in12.00 mm N/A 2.559 in65.00 mm N/A 2.677 in68.00 mm
15N000394-MC104Q N/A 70.00 Millimeter (mm) Nominal Diameter Pre-Opened Constant Tension Band Clamp N/A 0.472 in12.00 mm N/A 2.756 in70 mm N/A 2.874 in73.00 mm
15N000395-MC104Q N/A 75.00 Millimeter (mm) Nominal Diameter Pre-Opened Constant Tension Band Clamp N/A 0.472 in12.00 mm N/A 2.953 in75.00 mm N/A 3.071 in78.00 mm
15N000396-MC104Q N/A 80.00 Millimeter (mm) Nominal Diameter Pre-Opened Constant Tension Band Clamp N/A 0.472 in12.00 mm N/A 3.150 in80.00 mm N/A 3.268 in83.00 mm
15N000397-MC104Q N/A 13.00 Millimeter (mm) Nominal Diameter Pre-Opened Constant Tension Band Clamp N/A 0.591 in15.00 mm N/A 0.512 in13 mm N/A
15N000398-MC104Q N/A 14.00 Millimeter (mm) Nominal Diameter Pre-Opened Constant Tension Band Clamp N/A 0.591 in15.00 mm N/A 0.551 in14 mm N/A
15N000399-MC104Q N/A 18.00 Millimeter (mm) Nominal Diameter Pre-Opened Constant Tension Band Clamp N/A 0.591 in15.00 mm N/A 0.709 in18 mm N/A 0.768 in19.50 mm
15N000400-MC104Q N/A 22.00 Millimeter (mm) Nominal Diameter Pre-Opened Constant Tension Band Clamp N/A 0.591 in15.00 mm N/A 0.866 in22 mm N/A
15N000401-MC104Q N/A 26.00 Millimeter (mm) Nominal Diameter Pre-Opened Constant Tension Band Clamp N/A 0.591 in15.00 mm N/A 1.024 in26 mm N/A 1.102 in28.00 mm
15N000402-MC104Q N/A 28.00 Millimeter (mm) Nominal Diameter Pre-Opened Constant Tension Band Clamp N/A 0.591 in15.00 mm N/A 1.102 in28 mm N/A
15N000403-MC104Q N/A 30.00 Millimeter (mm) Nominal Diameter Pre-Opened Constant Tension Band Clamp N/A 0.591 in15.00 mm N/A 1.181 in30 mm N/A 1.280 in32.50 mm
15N000404-MC104Q N/A 38.00 Millimeter (mm) Nominal Diameter Pre-Opened Constant Tension Band Clamp N/A 0.591 in15.00 mm N/A 1.496 in38 mm N/A
15N000405-MC104Q N/A 41.00 Millimeter (mm) Nominal Diameter Pre-Opened Constant Tension Band Clamp N/A 0.591 in15.00 mm N/A 1.614 in41 mm N/A 1.713 in43.50 mm
15N000406-MC104Q N/A 60.00 Millimeter (mm) Nominal Diameter Pre-Opened Constant Tension Band Clamp N/A 0.591 in15.00 mm N/A 2.362 in60.00 mm N/A
15N000407-MC104Q N/A 65.00 Millimeter (mm) Nominal Diameter Pre-Opened Constant Tension Band Clamp N/A 0.591 in15.00 mm N/A 2.559 in65.00 mm N/A
15N000408-MC104Q N/A 70.00 Millimeter (mm) Nominal Diameter Pre-Opened Constant Tension Band Clamp N/A 0.591 in15.00 mm N/A 2.756 in70 mm N/A
Unit of Measure
1 2 3 4