d1 - Round (Type D)
s1 - Square (Type V)
GN990 Construction Tube, Steel or Aluminium, for Tube Clamp Connectors
Construction tubings GN 990 can be supplied in any length up to 3000mm, in 1mm increments.
Please call the sales office +44 (0)1732 763377 for pricing on other lengths of tubing.
The tolerances specified for the outside diameter of the round construction tubings comply with the requirements for split mono-block connector clamps. Otherwise the tolerances comply with DIN2391, DIN2395 and DIN2462.
Two-piece connector clamps allow larger tolerances on round and square construction tubings.
Steel ST. Steel, zinc plated, blue passivated ZB. Aluminium AL. Blank, untreated BL. Anodized, natural colour EL.
Sawed cross sections, deburred, blank, i.e. not surface treated.