Material qq-p-416, type ii, class a; o.D. 0.353 to 0.355 in.; i.D. 0.1093 to 0.1098 in. Thru; bottom side i.D.No. 35 dr 0.250 in. Deep, 138-32 nc-2b tap, 0.218 in. Deep bottom tap, 0.110 in. Min. Minor diameter after tap; through one side only, no. 53 dr. 073-64 nc-2b tap