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| Your material | Head | Thread | Material |
|---|---|---|---|
| Thin metal sheet | Pan or hex | Fine | 304 stainless |
| Wood furniture | Flat | Coarse | Zinc plated |
| Plastic enclosure | Wafer | Forming | Brass or stainless |
| Trailer floor | Hex | Coarse | Galvanized |
| Electronics | Pan | Fine | Brass |
| Outdoor sign | Flat | Coarse | 316 stainless |
| Drywall | Flat | Coarse | Black oxide |
| Automotive trim | Wafer | Forming | 304 stainless |
| Head | Feature |
|---|---|
| Flat | Sits flush with surface |
| Wafer | Low profile, wide clamp |
| Pan | General purpose |
| Hex | High torque, wrench drive |
| Countersunk | Hides below surface |
| Truss | Wide head, soft materials |
| Thread | Use for |
|---|---|
| Fine | Thin metal, hard plastic |
| Coarse | Wood, soft plastic |
| Forming | Plastic (no chips, no cracks) |
| Cutting | Metal (less torque) |
| Material | Resists |
|---|---|
| 304 stainless | Rust, moisture, outdoor |
| 316 stainless | Salt water, chemicals |
| Brass | Corrosion, magnetism |
| Zinc plated | Light rust (budget) |
| Aluminium | Weight, corrosion |
| Black oxide | Glare (indoor) |
| Drive | Tool |
|---|---|
| Phillips | Phillips screwdriver |
| Slotted | Flat blade |
| Hex socket | Allen key |
| Torx | Torx driver |
| Issue | Fix |
|---|---|
| Pilot hole too small | Drill slightly smaller than screw |
| Torque too high | Use clutch, start slow |
| Wrong bit | Use correct Phillips/Torx/hex |
| Hardwood splitting | Always pre‑drill |
| Plastic cracking | Stop when head touches |
ISO 9001 and ISO 10012 certified. Every batch inspected.
YH Fastener has been making precision fasteners since 1998. We make self tapping screws, machine screws, shoulder screws, and custom fasteners. ISO 9001 and ISO 10012 certified. Factory direct. Ship to over 60 countries.
A self tapping screw is engineered to cut or form its own mating thread as it is driven into a pre-drilled pilot hole, creating a firm and secure fit without requiring a pre-threaded nut or tapped hole.
Flat heads and countersunk heads sit flush with or countersink below the surface of the workpiece, making them the optimal choice for smooth, unobtrusive finishes.
Thread-forming screws are best for plastic applications because they displace material without generating chips or causing stress cracks. Thread-cutting screws feature cutting edges ideal for metal, requiring lower driving torque.
304 stainless steel provides excellent everyday rust and moisture resistance for general outdoor use. 316 stainless steel contains molybdenum, giving it superior resistance to saltwater, marine exposure, and corrosive chemical environments.
Always pre-drill a pilot hole slightly smaller than the core diameter of the screw, particularly in hardwoods. Additionally, use an adjustable clutch to control torque, begin driving slowly, and stop tightening immediately once the head contacts the surface.
Yes, custom specifications and OEM orders are supported. You can send your detailed drawings or samples to receive a tailored quotation within 24 hours.
