Slotted capstan screws
Slotted capstan screws may be used both as fastening and adjusting screws. They are primarily designed for use in electrical engineering and may be tightened by means of a sliding tee bar where it is not possible to use a screwdriver. Locking wires are often attached to the cross holes for securing purposes.
Check out other specifications
Bolts, screws and studs — Nominal lengths, and thread lengths for general purpose bolts
ISO general purpose metric screw threads – Tolerances – Part 1 : Principles and basic data
Coiled, light duty spring-type straight pins (ISO 8751 : 1987) English version of DIN EN 28 751
Hexagon washer head tapping screws
High strength hexagon fit bolts with large widths across flats for structural steel bolting
STRAIGHTNESS GAGE AND GAGING FOR BOLTS AND SCREWS