Squareness of both V grooves to front and back sides: 197_in
Hold cylindrical workpieces for inspection and machining.
Two V-blocks per set.
Made of alloy steel.
Hardened to HRC60?2.
V groove on the top for large shafts.
V groove on the bottom for small shafts (except 6896-10).

3M 45190, Disc Pad Hub, 4-1/2 in 5/8-11 Internal, 7000045659
Insize 2187-6, ADJUSTABLE SNAP GAGE, 0-.24", 6928640314360
3M 45100, Roloc Disc Pad TR, Hard 1-1/2 in 1/4-20 Internal, 7000045286
3M 41554, Hi-Strength 90 Cylinder Spray Adhesive, Clear, Large Cylinder (Net Wt 28.8 lb), 7000028603 