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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

B3540-52500BA1W N/A 25" 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
B3540-52500BB1W N/A 25" 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
B3540-52500BN1W N/A 25" 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
B3540-52500BN2W N/A 25" 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
B3540-52500BN3W N/A 25" 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
B3540-52500BN4W N/A 25" 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
B3540-52600BA1W N/A 26" 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
B3540-52600BB1W N/A 26" 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
B3540-52600BN1W N/A 26" 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
B3540-52600BN2W N/A 26" 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
B3540-52600BN3W N/A 26" 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
B3540-52600BN4W N/A 26" 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
B3540-52700BA1W N/A 27" 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
B3540-52700BB1W N/A 27" 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
B3540-52700BN1W N/A 27" 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
B3540-52700BN2W N/A 27" 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
B3540-52700BN3W N/A 27" 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
B3540-52700BN4W N/A 27" 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
B3540-52800BA1W N/A 28" 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
B3540-52800BB1W N/A 28" 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
B3540-52800BN1W N/A 28" 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
B3540-52800BN2W N/A 28" 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
B3540-52800BN3W N/A 28" 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
B3540-52800BN4W N/A 28" 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
B3540-52900BA1W N/A 29" 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
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