Shopping Cart

Your cart is empty.

Your cart is empty.

SPI 630-4000 Setup 1-2-3 Blocks: 5 Tapped (3/8-16) Holes & 18 Untapped (3/8') Holes

5.0 Write Review
Free shipping on orders over $29.99

$36.71

$ 19 .99 $19.99

In Stock
  • This SPI steel 1-2-3 Block set includes a matched pair of 1-inch x 2-inch x 3-inch blocks, socket head cap screws, and a hex key
  • Squareness of all sides is within 0.0001 per inch
  • Constructed of hardened steel with 45-50 HRC Hardness
  • There are a total of 23 holes: 5 tapped (3/8-16) holes and 18 un-tapped (3/8") holes for easy clamping


This SPI steel 1-2-3 Block set includes a matched pair of 1-inch x 2-inch x 3-inch blocks, socket head cap screws, and a hex key. Each block has a 50 HRC hardness with 0.0001-inch squareness. There are a total of 23 holes: 5 tapped (3/8-16) holes and 18 un-tapped holes for easy clamping.