Description
SPI 1-2-3, 2-3-4 and 2-4-6 Block Sets
Hardened steel to RC 55-60, ground to surface finish 6-16 microinches.
Matched 1-2-3 and 2-3-4 Blocks
- Squareness of all sides within 0.0001″
per inch on 1-2-3 Blocks, 0.0003″
per inch on 2-3-4 Blocks. - Five tapped holes (38″-16)
18 untapped holes (0.340″ dia.).
Matched 2-4-6 Blocks
- Squareness of all sides
within 0.0003″ per inch. - Five tapped holes (58″-11)
18 untapped holes (0.520″ dia.)

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