Using new hardware makes any job more pleasant. If you're servicing your cylinder head you should examine the rocker studs for signs of stretching or stripped threads. Two long (51K885) and two short (
51K1473) per head.
This is 5/16"unc with other end unf for nut and is 3"long.
ALSO USED FOR ROD CHANGE GEARBOX TO DIFF HOUSING TO CASE
For use on Diff housing
Remote type case
53K266 are 4.5" long -4 for remote now use
TAM161753K1471 are 3"long 5/16"unc x3 or use 51K885
Rod change gearbox used
22G1834 are 4.5" long 3/8"unc with 0.375" thread rod change only x2-use
51K282CHS2624 are 3."long 3/8"with 0.250"thread x 3 or use
BH506181 bolt