Hook screws

Hook screws are designed to be attached to roadway supports of V sections V25, V29, V32, V34, V36, universal mining roof-bar, rail S18, S24,S30, S42, S49 and articulated roof-bar by means of one yoke and two hook screws. Hook screws and yokes are used in underground mining factories, in non-methane and methane fields, in workings classified as methane explosion hazard grade “a”, “b”, “c” and coal dust explosion hazard class A and B. We offer hook screws M12, M24, M27.

Hook screws include the M12, M24, M27 nut. It is also possible to use flange nut and M27 high nut with spring washer. Nut material should meet the requirements for at least class 5 of mechanical properties according to the PN-EN ISO 898-2:2012. Quality of workmanship - rough (C) according to the PN-EN ISO 4759-1:2004 standard.

Type of thread - as per the PN-ISO 965- 2:2001, PN-ISO 965-3:2001 standards. Upon arrangement with an ordering party, other nuts can be used with a strength class of minimum 5