Shopping Cart

Your cart is empty.

Your cart is empty.

Pair of Ultra Precision 2-3-4 Blocks 0.0002'-0.0003' 23 Holes 234 Blocks 3 Parts Per Million Precision

5.0 Write Review
Free shipping on orders over $29.99

$39.89

$ 18 .99 $18.99

In Stock
  • There are 23 holes with three-tenths of a millionth of precision, high precision and high accuracy.
  • Made of high quality steel, not easy to deform, not easy to break, wear-resistant, durable.
  • Easy to operate, easy to use.
  • Product includes: a pair of 23-hole parallel block.
  • Note: Please confirm the precision before purchase to avoid buying wrong. If you have any questions, please feel free to contact us.


This parallel block is made of high quality steel, which is hard, not easy to deform and wear-resistant, and at the same time high precision and accuracy.
A pair of 23-hole parallel blocks one millionth of precision. Include 5 holes tapped to 3/8-16 and others untapped
Squareness: 0.0003"/1"
Parallelism: ±0.0003"
Hardness: HRC 56-62
Package includes: a pair of 2 x 3 x 4 parallel blocks with 23 holes.