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Built for environments where moisture and mild chemicals are a daily reality, these GooBetter Fastener pan head self tapping screws offer long‑term reliability without the cost of 300‑series stainless. The 201 stainless steel provides solid corrosion resistance in damp, washdown, and outdoor settings — think marine trim, food processing equipment, HVAC ducting, and automotive under‑hood work. A classic Phillips pan head gives a flush, finished appearance and strong drive engagement, while the self‑tapping thread eliminates drilling and tapping steps in sheet metal, plastics, fiberglass, and wood composites. Available in M3, M4, and M5 diameters, this range covers light‑ to medium‑duty fastening where stainless integrity matters.
| Size | Thread Diameter | Typical Length Range (mm) | Head Style | Drive | Material |
|---|---|---|---|---|---|
| M3 | 3.0 mm | 10–40 | Pan Head | Phillips | 201 Stainless Steel |
| M4 | 4.0 mm | 12–50 | Pan Head | Phillips | 201 Stainless Steel |
| M5 | 5.0 mm | 16–60 | Pan Head | Phillips | 201 Stainless Steel |
* Lengths depend on pack selection. All dimensions conform to DIN/ISO equivalent tolerance standards.
201 stainless offers inherent corrosion resistance through its chromium‑nickel‑manganese composition, rather than relying on a surface coating. That means scratches or thread wear won’t expose bare steel to rust like zinc plating can. It’s a great choice for damp environments, food contact areas, and outdoor projects where budget or magnetism constraints matter.
They can, but with a caveat. 201 stainless fasteners are slightly harder than 300‑series, so they can tap into thin stainless sheet if the material is under about 1.2 mm. We always recommend a test on a sample piece, and using a lubricant or pilot hole for best results.
201 stainless is generally non‑magnetic in the annealed state, but cold work from thread forming can induce slight magnetism. They are substantially less magnetic than standard carbon steel and are safe for most electronics and sensitive installations.
A standard Phillips #1 (M3), #2 (M4), or #3 (M5) driver bit works perfectly. To prevent cam‑out and preserve the head recess, we recommend using a bit in good condition and applying firm, steady pressure while driving.
They are manufactured in China under strict dimensional and material controls. GooBetter Fastener inspects each batch for thread quality, hardness consistency, and surface finish before packaging.
