21 SPM21 28.3 28.3 64.8 82.6 12.3
Double Square/Shallow, inches, Industrial
3/8 P412 13/32 7/8 7/8 1-1/2 5/16
7/16 P414 13/16 15/16 7/8 1-1/2 3/8
1/2 P416 29/32 1 7/8 1-1/2 5/16
9/16 P418 1 1-1/8 7/8 1-1/2 1/2
5/8 P420 1-3/32 1-3/16 7/8 1-1/2 1/2
11/16 P422 1-7/32 1-1/4 7/8 1-1/2 13/32
3/4 P424 1-5/16 1-3/8 7/8 1-1/2 9/16
13/16 P426 1-7/16 1-7/16 7/8 1-1/2 5/8
7/8 P428 1-1/2 1-1/2 1-1/32 1-3/4 5/8
1 P432 1-23/32 1-3/4 1-1/8 1-3/4 3/4
Double Square/Deep, inches, Industrial
13/16 SIPR426 1-7/16 1-3/8 2-9/16 3-1/4 5/8
1 SIPR432 1-3/4 1-1/2 2-11/16 3-1/2 3/4
1-1/8 SIPR436 1-15/16 1-51/64 2-23/32 3-1/2 27/32
Double Square/Extra-Deep, inches, Industrial
1-1/8 SIPRL436 1-15/16 1-1/2 4-13/32 5 27/32
Shallow Magnetic, inches, Industrial
3/8 MPK121A 19/32 7/8 1-1/2 1/8
7/16 MPK141A 11/16 7/8 1-1/2 5/32
1/2 MPK161A 25/32 15/16 1-1/2 5/32
9/16 MPK181A 7/8 15/16 1-1/2 5/32
