For over 50 years, T.J. Davies Company, Inc. has earned and retained the trust of our customers. Our retention knobs and retention knob sockets exceed industry standards. Please see specs on this part number below.

Category BT 40
Part Number(s) PSI-444X15
Overall Length 2.125
Thread Size 5/8"-11
Taper BT 40
Knob Angle 15 Degree
Knob Diameter 0.746
Flange to end of Knob 1.141
Flange to Beginning of Tap 0.905
Neck Diameter 0.549
Socket Size RKS-BTCAT40
Solid PSI-444X15
Through Coolant PSCI-444X15
O-Ring No
Spec Sheet (PDF format) Full Scale
Notes If you require this knob with metric threads, the part number is PS-444X15