Hexagonal junction adapter with retaining shoulder

A plural line clamping assembly comprising:

• first and second channel members, each said channel member being of generally U-shaped cross-section and having two leg sections and a connecting section therebetween, said leg sections having interior walls separated by a predetermined distance, and each leg section being provided with semi-cylindrical collar portion formed at the outermost extent thereof that includes a substantially semi-cylindrical surface and a radiused surface interconnecting the semi-cylindrical surface to the interior wall of said leg section, said first and second channel members being adapted to be aligned and secured to each other in a position whereby the U-shapes of said channel members face each other and whereby pairs of semi-cylindrical collar portions oppose each other, with each such pair defining a diameter;
• at least two elongated stacking nut members of a common first length being disposed generally within the U-shaped channels of said first and second channel members and extending between said channel members, said stacking nuts being located on each side of said semi-cylindrical collar portions of said channel members, and each stacking nut being spaced from the next adjacent stacking nut by a second length;
• a junction adapter being formed with a central support portion of hexagonal cross-section and sized to be received within said U-shaped cross-sections of said first and second channel members and span substantially the entire predetermined distance, said adapter being received between and abutting said leg sections of said channel members and said adjacent stacking nut members and being dimensioned so that the distance between two opposed points on said hexagonal junction adapter is substantially equal to said first length and the distance between any two opposed faces of said hexagonal junction adapter is equal to said second length, and having a fluid passage extending axially through the entire length of said adapter;
• and
• bolt members extending through said first and second channel members and into engagement with said stacking nuts to cause said channel members to bear against and capture said junction adapter between said channel members and said adjacent stacking nut members,
• said junction adapter being a one-piece member formed with cylindrical collar portions and retaining shoulder portions on both axial sides of said central support portion, said semi-cylindrical collar and retaining shoulder portions being radially smaller than the central support section, said collar being sized to span said diameter encompassed by said semi-cylindrical collar portions, said retaining shoulder portions each being disposed between a respective one of the collar portions and said central support portion, with each retaining shoulder portion including a radiused surface that abuts snugly against one of the radiused surfaces of the collar support portions of the channel members such that the junction adapter is more rigidly secured between the leg sections within the clamping assembly against movement in an axial direction, and
• said junction adapter also being formed with threaded connection portions at each axial side of said collar portions opposite said central support portion.