US Granite Standards is a subsidiary of P W Calibrators, Inc. which manufactures Precision Granite Machine Bases, Surface Plates, Angle Plates, V-Blocks and Granite used for Air Bearing Surfaces.

We specialize in "Custom Sizes" to fit your needs for Drilling, Slotting and Precision Setting of Inserts on your Machine Bases. We take pride in our quick turn-around of your orders. All Granite work is traceable to N.I.S.T. and meets or exceeds Fed. Spec. GGG-P-463c. Field calibrations are available on Surface Plates. Our parent company, P W Calibrators, Inc., also calibrates Torque Wrenches, Pressure Gauges, Micrometers, Dial Indicators, Dial Calipers, Digital Calipers and Cable Tensiometers and other Aircraft Maintenance Tooling. All work is traceable to N.I.S.T. and meets or exceeds ANSI-NCSL Z-540-1-1994. P W Calibrators, Inc.is a member of the FAA APPROVED ANTI-DRUG PLAN #E-EA-0010-U (G-WP-660).

Manufacturer of: Granite Machine Bases, Granite Surface Plates, Granite Angle Plates, Granite V-Blocks, Granite Straight Edges, Granite Parallels, Granite Air Bearing Surfaces, Granite Drilling, Granite Slotting and Precision Setting of Stainless Steel Inserts.

We also Calibrate and Certify:Torque Wrenches, Pressure Gauges, Micrometers, Dial Indicators, Dial Calipers, Digital Calipers, Pacific Scientific Cable Tensiometers and Weigh Scales.