Fastener reference system
Direct answers, labeled visuals, and comparison tables—paired with Thread Identifier, size charts, and guides. Built for quick lookup, not long-form blog reading.
Core reference
Screw anatomy
Head, shank, thread, and point—what each region does and what to measure.
OpenThread types
Metric, unified coarse/fine, pipe—identification and comparison at a glance.
OpenSelf-tapping vs self-drilling
Pilot holes vs drill points; when each family belongs in the joint.
OpenVisual identification
Screw head types
Hex, pan, truss, countersunk, oval, round, fillister, wafer—diagrams and uses.
OpenScrew drive types
Phillips, Pozidriv, Torx, hex socket, slotted, Robertson—torque and cam-out.
OpenHead shape profiles
Side-view profiles: flush, countersunk, and domed seating.
OpenSponsored