Tool steel.

Hardened and ground.

Rest pads, Style A, serve as supports for workpieces and fixtures. Locating pins, Style B, serve to position workpieces and fixture parts in holes with locating dimensions.
The flattened Style C can be used to bridge tolerances in hole spacing or to secure the part to be positioned in one direction only.
Style A and B can also be used as hardened stop and as foot for fixtures.
For similar bolts, see 03120, 03130, 03140 and 03150.

Style A: Rest pad
Style B: Cylindrical locating pin
Style C: Flattened locating pin

For other dimensions see Style A.