Shop › 3/8"-16 All-Thread rod Image 1 of 1 3/8"-16 All-Thread rod from $1.00 3/8” - 16 All Thread cut at various lengths for raising up support channel. All pieces have been precut and deburred. Size: Select Size 4" 6" 10" Add To Cart Added! 3/8” - 16 All Thread cut at various lengths for raising up support channel. All pieces have been precut and deburred.