Channel Support Systems - Standard Fixings & Fastenings

Hexagon Head Setscrews

  • Size Size
    Electroplated zinc M10×40
    M6×16 M10×45
    M6×20 M10×50
    M6×25 M10×60
    M6×30 M12×20
    M8×20 M12×25
    M8×25 M12×30
    M8×30 M12×35
    M8×35 M12×40
    M8×40 M12×50
    M8×50 Hot dip galvanised
    M10×16 M6×12
    M10×20 M6×16
    M10×25 M6×20
    M10×30 M6×35
    M10×35  

Cone Point Screws (M10×35)

  • Type: Electroplated zinc or stainless steel

Hexagon Nuts

  • Size Size
    Electroplated zinc M10
    M6 M12
    M8 Stainless steel
    M10 M6
    M12 M8
    Hot dip galvanised M10
    M6 M12
    M8  

Roofing Nuts and Bolts

  • Size Size
    Electroplated zinc Hot dip galvanised
    M6×12 M6×12
    M6×16 M6×16
    M6×20 Stainless steel
    M6×25 M6×12
    M6×30 M6×16
    M6×40 M6×20
    M6×50  

Flat Washers

  • Size Size
    Electroplated zinc Stainless steel
    M6 M6
    M8 M8
    M10 M10
    M12 M12

Roofing Washers (M6)

  • Type: Hot dip galvanised.

Penny Washers

  • Size Size
    Electroplated zinc
    M6×25 M10×38
    M8×25 M12×40

Shakeproof Washers

  • Size Size
    Electroplated zinc
    M6 M10
    M8 M12

Tray Washers (M6×20)

  • Type: Electroplated zinc or hot dip galvanised.

Threaded Rod

  • Size Size
    Electroplated zinc Stainless steel
    M6×3 m M6×3 m
    M8×3 m M8×3 m
    M10×3 m M10×3 m
    M12×3 m M12×3 m

Threaded Rod Connectors

  • Size Size
    Electroplated zinc
    M6 M10
    M8 M12

Eye Bolts

  • Size Size
    Electroplated zinc
    M6×80 M10×80
    M8×80 M12×80

Fastenings

Fastening brackets and supports to channel

Standard fastenings for channel are high tensile hexagon head setscrews to BS 3692-8·8, being zinc plated to BS 3382 : Part 2.

Channel Type Fitting Thickness(1) Recommended Fastening(2)
Deep channel CC4141 series 6 mm and 8 mm M10 or M12 x 35 mm(3)
  5 mm and 6 mm M10 or M12 x 30 mm
Shallow channel CC2121 series 7 mm and 8 mm M10 or M12 x 25 mm(3)
  5 mm and 6 mm M10 or M12 x 20 mm

(1) Most standard brackets are made from 5 mm gauge steel

(2) The use of too long a fastening will prevent proper tightening because the bolt end will foul the bottom of the channel before the head tightens down on the fitting

(3) When fastening brackets other than channel, longer bolts may be required if the bracket thickness is greater than 8 mm

Fastening tray to supports

Use M6 x 16 mm zinc plated roofing bolts or pan head bolts

Fastening ladder to supports

Use M10 x 16 mm high tensile hexagon head setscrews