At DPI, we manufacture our subs utilizing 4140 Q&T Alloy Bar. Our heat treatment allows us to maintain a 28-32 RC hardness. We offer our subs with flats, lugs, float bores, fishing necks, dual thread, and in flanged configurations.
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| Pin x Box with Flats | Pin x Pin Extended Length |
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| Box x Box with Flats | Pin x Box Crossover Sub |
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| Pin x Pin Compact |