Howmet Fastening Systems
Howmet Fastening Systems
Phone: Sales +1 800 992 4444
Technical Support +1 310 784 6409
Email: HFSTechSupport@howmet.com
Website: www.hfs.howmet.com
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Stud - Ring Locked - SF Series
Unit of Measure
« 6 7 8 9 10 

Item #

Material

Heat Treat

Finish

A Nut End Thread Size

B Stud End Thread Size

L ±.015

SF151-16SA16 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.000 in
SFT151-16SA17A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.062 in
SFT151-16SA17 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.062 in
SFT151-16SA18A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.125 in
SFT151-16SA18 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.125 in
SFT151-16SA19A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.188 in
SFT151-16SA19 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.188 in
SFT151-16SA20A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.250 in
SFT151-16SA20 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.250 in
SFT151-16SA21A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.312 in
SFT151-16SA21 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.312 in
SFT151-16SA22A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.375 in
SFT151-16SA22 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.375 in
SFT151-16SA23A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.438 in
SFT151-16SA23 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.438 in
SFT151-16SA24A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.500 in
SFT151-16SA24 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.500 in
SFT151-16SA25A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.562 in
SFT151-16SA25 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.562 in
SFT151-16SA26A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.625 in
SFT151-16SA26 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.625 in
SFT151-16SA27A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.688 in
SFT151-16SA27 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.688 in
SFT151-16SA28A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.750 in
SFT151-16SA28 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.750 in
SFT151-16SA29A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.812 in
SFT151-16SA29 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.812 in
SFT151-16SA30A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.875 in
SFT151-16SA30 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.875 in
SFT151-16SA31A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.938 in
SFT151-16SA31 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 1.938 in
SFT151-16SA32A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.000 in
SFT151-16SA32 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.000 in
SFT151-16SA33A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.062 in
SFT151-16SA33 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.062 in
SFT151-16SA34A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.125 in
SFT151-16SA34 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.125 in
SFT151-16SA35A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.188 in
SFT151-16SA35 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.188 in
SFT151-16SA36A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.250 in
SFT151-16SA36 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.250 in
SFT151-16SA37A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.312 in
SFT151-16SA37 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.312 in
SFT151-16SA38A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.375 in
SFT151-16SA38 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.375 in
SFT151-16SA39A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.438 in
SFT151-16SA39 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.438 in
SFT151-16SA40A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.500 in
SFT151-16SA40 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.500 in
SFT151-16SA41A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.562 in
SFT151-16SA41 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.562 in
SFT151-16SA42A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.625 in
SFT151-16SA42 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.625 in
SFT151-16SA43A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.688 in
SFT151-16SA43 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.688 in
SFT151-16SA44A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.750 in
SFT151-16SA44 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.750 in
SFT151-16SA45A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.812 in
SFT151-16SA45 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.812 in
SFT151-16SA46A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.875 in
SFT151-16SA46 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.875 in
SFT151-16SA47A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.938 in
SFT151-16SA47 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 2.938 in
SFT151-16SA48A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.000 in
SFT151-16SA48 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.000 in
SFT151-16SA49A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.062 in
SFT151-16SA49 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.062 in
SFT151-16SA50A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.125 in
SFT151-16SA50 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.125 in
SFT151-16SA51A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.188 in
SFT151-16SA51 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.188 in
SFT151-16SA52A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.250 in
SFT151-16SA52 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.250 in
SFT151-16SA53A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.312 in
SFT151-16SA53 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.312 in
SFT151-16SA54A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.375 in
SFT151-16SA54 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.375 in
SFT151-16SA55A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.438 in
SFT151-16SA55 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.438 in
SFT151-16SA56A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.500 in
SFT151-16SA56 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.500 in
SFT151-16SA57A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.562 in
SFT151-16SA57 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.562 in
SFT151-16SA58A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.625 in
SFT151-16SA58 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.625 in
SFT151-16SA59A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.688 in
SFT151-16SA59 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.688 in
SFT151-16SA60A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.750 in
SFT151-16SA60 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.750 in
SFT151-16SA61A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.812 in
SFT151-16SA61 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.812 in
SFT151-16SA62A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.875 in
SFT151-16SA62 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 3.875 in
SFT151-16SA64A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 4.000 in
SFT151-16SA64 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 4.000 in
SFT151-16SA66A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 4.125 in
SFT151-16SA66 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 4.125 in
SFT151-16SA68A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 4.250 in
SFT151-16SA68 N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 4.250 in
SFT151-16SA70A N/A 4130 Steel N/A 125,000 PSI UTS min N/A Cadmium plate per QQ-P-416, Type II, Class 3 N/A 0.5625-18 UNF-3A N/A 0.6250-11 N/A 4.375 in
Unit of Measure
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