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The length between the center of the two bolts is referred to as the center line.  The distance between the center of the tank holes must be within 1/32” of the center line measurement.

B3540-5 Category
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Item #

Centerline

Mounting

Feature

Max Pressure

Max Temperature

Seals

Body Material

B3540-52100BN1W N/A 21" N/A 1/4" Male NPT Adapters N/A Card Thermometer, Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-52100BN2W N/A 21" N/A 3/8" Male NPT Adapters N/A Card Thermometer, Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-52100BN3W N/A 21" N/A 1/2" Male NPT Adapters N/A Card Thermometer, Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-52100BN4W N/A 21" N/A 3/4" Male NPT Adapters N/A Card Thermometer, Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-52200BA1W N/A 22" N/A 1/2"-20 N/A Card Thermometer, Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-52200BB1W N/A 22" N/A 1/2"-20 with Nuts N/A Card Thermometer, Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-52200BN1W N/A 22" N/A 1/4" Male NPT Adapters N/A Card Thermometer, Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-52200BN2W N/A 22" N/A 3/8" Male NPT Adapters N/A Card Thermometer, Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-52200BN3W N/A 22" N/A 1/2" Male NPT Adapters N/A Card Thermometer, Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-52200BN4W N/A 22" N/A 3/4" Male NPT Adapters N/A Card Thermometer, Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-52300BA1W N/A 23" N/A 1/2"-20 N/A Card Thermometer, Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-52300BB1W N/A 23" N/A 1/2"-20 with Nuts N/A Card Thermometer, Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-52300BN1W N/A 23" N/A 1/4" Male NPT Adapters N/A Card Thermometer, Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-52300BN2W N/A 23" N/A 3/8" Male NPT Adapters N/A Card Thermometer, Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-52300BN3W N/A 23" N/A 1/2" Male NPT Adapters N/A Card Thermometer, Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-52300BN4W N/A 23" N/A 3/4" Male NPT Adapters N/A Card Thermometer, Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-52400BA1W N/A 24" N/A 1/2"-20 N/A Card Thermometer, Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-52400VA1W N/A 24" N/A 1/2"-20 N/A Card Thermometer, Shut-Off N/A 175 PSI N/A 225° F N/A Viton N/A Aluminum
B3540-52400BB1W N/A 24" N/A 1/2"-20 with Nuts N/A Card Thermometer, Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-52400BN1W N/A 24" N/A 1/4" Male NPT Adapters N/A Card Thermometer, Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-52400BN2W N/A 24" N/A 3/8" Male NPT Adapters N/A Card Thermometer, Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-52400BN3W N/A 24" N/A 1/2" Male NPT Adapters N/A Card Thermometer, Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-52400BN4W N/A 24" N/A 3/4" Male NPT Adapters N/A Card Thermometer, Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
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