Mil-s-5-59,1/4 hard mil spec 1st material response or mil-s-5059,1/2 hard mil spec 2nd material response or mil-s-5059,1/4 hard mil spec 3rd material response or astm,a582 assn std 4th material response
Mil-s-5-59 mil spec 1st material response or mil-s-5050 mil spec 2nd material response or astm a582 assn std 3rd material response
Mil-s-5-59,1/2hard mil spec single material response
Qq-s-766,cond a fed spec single material response or mil-s-5-59,cond a mil spec single material response