Navy Eddy Current Reference Standard Kit
Manufactured in accordance with U.S.A.F. T.O. 33B-1-1 Figure 4-40
P/N NRK-3A: Aluminum 7075-T651 - top and middle layers and 7075-T73 bottom layer
P/N NRK-3S: 4340 Steel all three layers
P/N NRK-3T: 6AL-4V TI all three layers
P/N NRK-3AST: Consists of all three of the above
The standard is a 3 plate assembly measuring 4" x 7" x 0.875". Contains 20 fastener holes with diameters ranging from 0.156" to 0.750"., 2 screw holes and 2 dowel holes. There are 71 E.D.M. notches in various locations. Notch depths and lengths vary. Widths for all notches is 0.004"
Note: Certificate of Calibration (Dimensional Certificate, Test Report) is included in the price quoted.