National, Challenge & Early Seybold Knife Bolt - B48
- Our Part Number: B48
For Challenge 370 E and G series models, and 420, National, and early Seybold Paper Cutters. This 1/2-12 thread steel hex head cap screw fits the Challenge 370 E and G models, Challenge 420, most National, and early Seybold Paper Cutters. (This bolt is equivalent to the original Challenge 1/2 x 1" V-Thread knife bolt, part number S-645, with the equivalent washer which was originally part number S-353.)
The 1/2"-12 thread is 1-3/32" long below the washer. The washer is captive, it will rotate in place but it will not fall off.
Made in USA.