This is a set of FOUR (4) of what we feel is the best bearing retainer screw for the Muncie 4 speed with Maindrive bearing retainer part number 3851326. These do not accept the "French Locks" that originally came on the Muncie bearing retainers, but we recommend todays thread retaining compounds for use with these to acheive a strong installation. NOTE: if you wish to use the lock tabs, these screws can be modified, by the installer, to function with them if you feel strongly about the "French Lock" style of retention. These are top quality AMERICAN MADE SAE Grade 5 thin head cap screws that we feel to be the best bolt to use if your originals are no longer useable or available. PLEASE NOTE: A standard 3/8" x 16 screw is NOT acceptable in this location on a Muncie, if you need to know why, CALL our Help line TOLL FREE 1-877-614-GEAR we will be happy to discuss this or any other tech issue you may need help with.