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Designed for precise, low‑profile fastening, these A2 / 304 stainless steel button truss head self‑tapping screws deliver a wide bearing surface that resists pull‑through while maintaining a clean, rounded appearance. The Pozi‑compatible Phillips recess grips your driver firmly, significantly reducing cam‑out compared to a standard Phillips drive – especially helpful when you’re working with machinery, jigs, or camera tripods and brackets where repeatable torque matters. The sharp metric coarse thread cuts its own tight mate into sheet metal, aluminum, plastics, and wood composites without a pilot hole in most thin materials. Solid 304 stainless steel construction ensures permanent rust protection in humid, outdoor, and mild chemical environments, with no coating to wear off. GooBetter Fastener supplies the two most‑requested small diameters, M3 and M3.5, with fully‑threaded lengths from 6 mm to 20 mm, so you can match the screw exactly to your assembly thickness.
| Size | Thread Diameter | Thread Lengths (mm)* | Head Style | Drive | Material |
|---|---|---|---|---|---|
| M3 | 3.0 mm | 6, 8, 10, 12, 16, 20 | Button Truss Head | Phillips / Pozi | A2 304 Stainless Steel |
| M3.5 | 3.5 mm | 6, 8, 10, 12, 16, 20 | Button Truss Head | Phillips / Pozi | A2 304 Stainless Steel |
* Lengths are thread length only (head height is not included). Exact length options vary per size – choose from the listing drop‑down. Dimensional tolerances follow the GB standard.
Yes. A standard Phillips bit fits and will drive these screws, but for maximum grip and to fully experience the reduced cam‑out, a proper Pozi bit (usually marked PZ1 or PZ2) is recommended. The recess is compatible with both.
In thin sheet metal (up to about 1.2 mm), soft plastics, and wood, you can drive them directly. For thicker steel, hard materials, or when using the screw as a machine screw, drill a hole roughly 80% of the thread diameter for the cleanest thread.
Absolutely. The M3 and M3.5 sizes are standard for camera equipment, quick‑release plates, and optical mounts. The 304 stainless steel resists rust from skin contact and outdoor humidity, making it a reliable choice for field gear.
Length is the thread length only, measured from directly under the button truss head to the tip. The head height is not included, so you can accurately match the thread length to your material thickness.
