Screws for holding the original factory hard jaws onto Columbian, Craftsman and other vises - specifically known to fit the Columbian C43-1/2  and Craftsman 506.  Will fit many other makes and models if the specifications below match your vise jaws and casting: 
The largest diameter of the flat head is .367" +.005 / -.0010"
The overall length is approximately .625
Thread is 1/4-20
Included angle of the head is 30 degrees
Threads and flat head are zinc plated.  For an entirely plain-steel screw (zinc plating stripped off), see my other listings

New material.

Slotted/flat blade head

This listing is for a single replacement screw

Please check that these values match your jaws or existing/broken screws before ordering.

I can make replacements for many other antique vise screws and parts, contact me via eBay messages to exchange details

By default, this ships via stamped mail for free and may take 1.5 weeks for delivery.  If you require faster delivery or tracking, select the appropriate option at checkout ($4 extra to cover the tracked label)