Set screws.Brass DIN933.Nuts and washers are available seperately.
M8x16 Hex Set Screws, High Tensile 8.8 Bright Zinc Plated
Hex Flange Bolt 10.9 Coarse M8X1.25 / 13mm Wrench DIN 6921 - BelMetric
Hex Bolts - Buy Stainless Steel Hex Bolts Online at Best price in
Screw Mushroom Slotted In Cross M8X16 Brass - Screw Express
Brass Hexagon Head Set Screws - DIN 933
Allen Screw M8x16 / Torque: 25 Nm / 19 ft. lb.
SS165
M3 M4 M5 M6 M8 M10 M12 Brass hexagon screw set ,Brass hexagon extended bolt with nut and Gasket,All copper screw combination - AliExpress
Hex Head Set Screws
Hex Set Screw – Metric Grade 316