M20 - Outer:37mm Inner:21.4mm Thickness:3.0mm. Black Neoprene Rubber Form A Flat Washers. Form A Flat Washers. Lets bring things together.
M20 / 20mm PART THREADED BOLT GRADE 8.8 ZINC SCREW HEXAGON HEX HEAD BOLTS DIN931
M20 / 20mm METRIC 10.9 STEEL HIGH TENSILE HEX HEAD BOLTS FULL & PART THREAD
M20 / 20mm SPRING WASHER SQUARE A2 STAINLESS STEEL - DIN 7980 METRIC SQ WASHERS
Pack Of 10 x Cable Gland Insert Black M20 For Flat 1.5mm 1 - T+E Wiska 10064322
Pack Of 10 x Cable Gland Insert Black M20 For Flat 2.5mm 2.5 - 4mm T+E Wiska
Pack Of 25 x Cable Gland Insert Black M20 For Flat 1.5mm 1 - T+E Wiska 10064322