Special Features:

Steel 8630 per mil-s-18728 condition n, 150, 000 to 170, 000 psi heat treated, dim. Data, 3.250 in. Lg, 1.900 in. W, 0.125 in. Thk, 2 ea 0.376 in. Min, 0.383 in. Max diameter holes 2.000 in. C to c, 1 surface serrated, serration data, 0.312 in. Lg-90.0 degrees pitch, 0.013 in. Min, 0.016 in. Max tooth depth, 100 microinch serration finish

Properties:

A flat or preformed item of metallic or nonmetallic material. It may vary in shape and its surface may be smooth and/or serrated. Its thickness is small in comparison to both its length and width. It is designed to be mounted upon a surface or between two surfaces. Its primary function is to strengthen, join, or separate aircraft structural parts. Excludes plate, mending; shim; and spacer, plate.