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- 2 Pc Ultra Precision 1-2-3 Block Set
- 23 Holes
- Squareness: .0001"
- Parallelism: +/- .0001"
- Height Accuracy in Pair: +/-.0001"
- Hardness: HRC 56-60
- Finished from 6-16 micro inches
- Nominal Tapping: 0.0001" to 0.0003"
- 5 holes tapped to 3/8-16 and others untapped
- Precision ground on all sides
- Squareness on all sides
- Product includes: Five stainless steel socket head cap screws, One hex key, fitted case
- Case Included
- Case Overall Dimension: 8-1/4''L x 5''W x 2''H *Estimate Only*
- Shipping Weight: 2.75 Lbs
Pc Macdonald
2025-08-10 15:29:17
Manufacturer stated that thru holes were 3/8" in diameter. They are smaller, and a 3/8-18 machine screw will not pass thru.A nice pair of paperweights.
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