3a nut thread thread class right-hand nut thread 0.690" stud thread thread length 1.620" overall length 18 stud thread thread quantity per inch threads on stud end are of special design, both end have 0.680 in. dia hole bored through threads unc stud thread thread series
3a thread class right-hand flush countersunk head style 0.370" grip length 32 thread quantity per inch 7100 double pounds per square inch shear strength cadmium surface treated unjf thread series
