Figures 4-47 through 4-49 Eddy Current Standard, NSN 6635-01-092-5129,
P/N 947479-10

The common standard used to perform Eddy Current inspections on Carbon Steel
components within  the Air Force unless otherwise specified by the cognizant
weapon system engineering authority.

The standard is a 3 plate assembly measuring 4" x 7" x 1.06". Contains
20 fastener holes, with diameters ranging from .156" to .750"., 2 screw holes,
and 2 dowel holes.

There are 66 E.D.M. notches in various locations. Notch depths and lengths vary.

Widths for all notches is .004"