| Property |
Specification |
| Definition |
Mechanical devices used to join two or more components together |
| Material |
Steel (carbon, alloy, stainless), brass, aluminum, titanium, plastic |
| Types |
Bolts, Screws, Nuts, Washers, Rivets, Pins, Anchors, Clips |
| Head Types (for bolts/screws) |
Hex, Pan, Flat, Round, Oval, Socket, Truss |
| Thread Types |
Coarse, Fine, Metric, Unified National (UNC/UNF), Self-tapping |
| Drive Types |
Slotted, Phillips, Torx, Allen (Hex), Pozidriv, Square |
| Coatings/Finishes |
Zinc-plated, Black oxide, Hot-dip galvanized, Chrome-plated |
| Strength Grades |
Grade 2, 5, 8 (SAE); Class 8.8, 10.9, 12.9 (Metric) |
| Standards |
ASTM, DIN, ISO, ANSI, BS, JIS |
| Applications |
Machinery, construction, automotive, aerospace, electronics, furniture |
| Reusable |
Most fasteners (except permanent ones like rivets) are reusable |
| Joining Method |
Typically by tightening with torque using tools like wrenches, screwdriver |
