Specifications: - all holes are interconnected - threaded: 5/16"- 24 NF - seating : 54° These junctions are produced from extruded light alloy sections and have two fixing holes. Suitable only for 4 mm (5/32") tubing......Specifications: - all holes are interconnected - threaded: 5/16"- 24 NF - seating : 54° These junctions are produced from extruded light alloy sections and have two fixing holes. Suitable only for 4 mm (5/32") tubing. Junction meter units type D21 and DDJ may be screwed directly in the junction. Junction of different length and fixing centres can be supplied to special order.