dlvldoc,, im really puzzled whats the difference among the thread sizes like 3/4-16 to M20x1.5??

Fleetguard 551A is 3/4-16
Wix 51515 is 3/4-16

Badlwin BD 28 is M26 x 1.5
Fleetgaurd LF3689 is M26x 1.5

wix 57400 M26X 1.5 (cross of LF3689)
wix 51067 M26X 1.5 (cross of BD28)


Fleetguard 3487 3/4-16 (cross of 551A)

IM really puzzled now???