7 models · Made in USA · Auburn Hills, Michigan
Suburban Tool Precision Tri-Blocks
Suburban Tool 1-2-3 blocks and metric tri-blocks are essential setup tools for machinists, tool & die makers, and QC inspectors. Precision-ground and hardened, these blocks provide accurate reference surfaces for layout, workholding, parallels, and angle-block setups on the surface plate or milling machine.
This collection spans inch and metric sizes including 25 × 50 × 75mm, 25 × 50 × 100mm, and 50 × 80 × 100mm tri-blocks, available individually or as matched pairs. Choose hole or no-hole configurations to suit your fixturing needs.
- Suburban Tool quality, Made in USA
- Inch and metric 1-2-3 blocks and tri-blocks
- Matched pairs and individual blocks available
- Hardened, precision-ground for setup and inspection
Prices in US$. Click a model number for photos, details and certification options.
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| Model | Single or Pair | Holes | Square | Flat & Parallel | Size (Inches) | Weight | Price | |
|---|---|---|---|---|---|---|---|---|
| PB-123 | Single | None | 0.0002" total | 0.0002" | 1" x 2" x 3" ±0.0001" | 2 lb | $135.45 | |
| B-123-H1-M1 Hole | Pair | 1 | 0.0001"/1" | 0.0002" | 1" x 2" x 3" ±0.0002" | 3 lb | $199.50 | |
| B-123-H11-M11 Holes | Pair | 11 | 0.0001"/1" | 0.0002" | 1" x 2" x 3" +0.0001"/+0.0003" | 3 lb | $254.10 | |
| B-123-H23-M23 Holes | Pair | 23 | 0.0001"/1" | 0.0002" | 1" x 2" x 3" +0.0001"/+0.0003" | 3 lb | $308.70 | |
| B-123-NH-MNo Holes | Pair | None | 0.0001"/1" | 0.0002" | 1" x 2" x 3" +0.0001"/+0.0003" | 3 lb | $172.20 | |
| B-234-H23-M23 Holes | Pair | 23 | 0.0001"/1" | 0.0003" | 2" x 3" x 4" +0.0001"/+0.0004" | 12 lb | $690.90 | |
| B-246-H23-M23 Holes | Pair | 23 | 0.0001"/1" | 0.0003" | 2" x 4" x 6" +0.0001"/+0.0004" | 24 lb | $1,065.75 |