Unbrako Socket Head Csk Screw Full Thread M20 x 35mm in Black Oxide - ISO 10642 (DIN 7991)
A countersunk headed screw conforming with ISO 10642 or DIN 7991, requiring a hex key (otherwise known as an Allen key) to fit. The countersunk head is typically used in conjunction with a countersunk hole providing a flush, snag free fit. The head diameter is slightly larger than that of the equivalent DIN 965 Phillips or Pozi driven screw. UNBRAKO® branded and manufactured to be stronger than the other size for size high tensile versions. Includes a precision hex socket for maximum key engagement. Please note that the black oxide finish offers only a basic level of corrosion resistance. Property class of 12.9.