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Fittings

Flanges

Cartridge Heater with Flange
  • Standard flange material is stainless steel.
  • Flanges can be welded on the lead end of the heater.
  • Flanges can be used to hold a heater in place to prevent backing out during operation.
  • Flanges also assist in heater removal. 
  • Flanges can be round or irregularly shaped and are 1/16" thick. 
  • Custom round or rectangular flanges available.
  • Contact Backer Marathon for standard and non-standard flange configurations at sales@backermarathon.com.

Standard Flange Dimensions

Flange Outside Diameter 1" 1-1/2" 2"
Can be used on 1/4, 5/16, 3/8, 1/2 1/4, 5/16, 3/8, 1/2, 5/8, 3/4  1/2, 5/8, 3/4, 1
Hole Spacing 3/4 1-1/18 1-1/2
Hole Size .14 .16 .20

Single Ended NPT Fittings

Cartridge with Single Brass NPT Fitting  

Single End NPT Fitting Specification Chart

Heater Diameter 1/4" 3/8" 1/2" 5/8" 3/4" 1"
NPT Thread Size 1/8 1/4 3/8 1/2 3/4 1
Brass "A" (length) .57 .70 .74 .80 .92 1.30
Brass "B" (hex width) .43 .56 .69 .87 1.06 1.44
Stainless Steel "A" (length) .62 .76 .77 .84 .96 1.27
Stainless Steel "B" (hex width) .46 .56 .67 .87 1.06 1.37

Double Ended NPT Fittings

Cartridge Heater with Double-Ended Brass NPT Fittings  

Double Ended NPT Fitting Specification Chart

Heater Diameter 1/4" 3/8" 1/2" 5/8" 3/4" 1"
NPT Thread Size 1/8 1/4 3/8 1/2 3/4 1
Brass "A" (length) .98 1.13 1.25 1.53 1.72 2.35
Brass "B" (hex width) .43 .56 .69 .87 1.06 1.37
Stainless Steel "A" (length) .98 1.13 1.25 1.53 1.72 CALL
Stainless Steel "B" (hex width) .43 .56 .68 .87 1.06 CALL

Mechanical Stops

Cartridge Heater with Tab Stops

Mechanical Stops are ideal for preventing heaters from sliding too far into the hole. Backer Marathon offers the following mechanical stops:

  • Weld Beads
  • Tab Stops
  • Locating Rings
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