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 (3⁄8"-16)
18 untapped holes (0.340" dia.).
Matched 2-4-6 Blocks
- Squareness of all sides
within 0.0003" per inch. - Five tapped holes (5⁄8"-11)
18 untapped holes (0.520" dia.)
![Warning Icon](https://cdn11.bigcommerce.com/s-6vccrv70fh/images/stencil/original/image-manager/warning-icon-new.png?t=1709211126)
For more info, visit www.p65warnings.ca.gov.
![SPI 1-2-3, 2-3-4 and 2-4-6 Block Sets SPI 1-2-3, 2-3-4 and 2-4-6 Block Sets](https://cdn11.bigcommerce.com/s-4s9liwcv/images/stencil/300x300/products/104052/306782/13-670-5-SPI-pic1__71309.1481307607.jpg?c=2)