MRC:
Those unusual or unique characteristics or qualities of an item not covered in the other requirements and which are determined to be essential for identification.FEAT
Special Features:
X4340 steel; i.V.D. Aluminum coated; internal threads 2.125 in. Dia. By 16 threads per in., unj thread series, and thread class 3b; heat treated to 140 - 170 ksi tensile strength rc 32 to 38; countersink both ends 2.130 to 2.160 in. Dia. With 90 degree angle; top of nut has 8 slots 0.260 0.280 in. Width equally spaced; top also has 0.280 in. Wide external involute spline with 46 teeth, major dia. Of 2.915 to 2.937 in., and minor dia. Of 2.775 in. ; located at sta 138.4
