Phillips Pan Head Self-Tapping Screws M1.4–M5 — A2 Stainless Steel for Lasting Sheet Metal Fastening
Finding the right small-diameter self-tapping screw that won’t rust, strip, or damage thin panels is a recurring challenge for electronics assemblers, HVAC technicians, appliance repair professionals, and precision DIY builders. These Phillips pan head self-tapping screws in A2 304 stainless steel are built for exactly those applications — combining a corrosion-resistant material with a flat tail point that locates cleanly in punched or drilled sheet metal holes before driving.
Each pack contains A2 (304) stainless steel screws with a pan head profile and flat tail self-tapping point, available in thread diameters from M1.4 to M5 and lengths from 4mm (≈5/32") to 20mm (≈3/4"). Quantity options range from 5 to 500 pieces per order, making it easy to source the exact amount needed for a repair job or a production run. The metric thread sizing follows ISO standards, compatible with standard metric tooling.
Typical applications include sheet metal enclosure assembly, consumer electronics chassis fastening, HVAC duct and panel work, small appliance manufacturing, and precision DIY projects requiring a corrosion-resistant fastener in a compact pan head profile. The A2 stainless finish also makes these suitable for light outdoor use where a black zinc or carbon steel screw would corrode over time.
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Compatibility Note: These are metric self-tapping screws designed for thin sheet metal and similar materials. They are not direct replacements for machine screws in pre-tapped metric holes. Please select the correct diameter and length variant for your application. Thread pitch follows standard metric self-tapping dimensions — contact us to confirm if you need exact pitch specifications.
✅ Key Features of These Phillips Pan Head Self-Tapping Screws
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🪨A2 304 Stainless Steel — Offers reliable corrosion resistance for indoor, humid, and light outdoor environments, making these screws a durable alternative to carbon steel or zinc-plated fasteners in moisture-prone assemblies.
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🔩Flat Tail Self-Tapping Point — The blunt tip locates accurately in punched or pre-drilled holes before driving, reducing skipping and surface damage on thin sheet metal panels during assembly.
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🍞Pan Head Profile — The low-profile pan head sits flush against the workpiece surface without protruding excessively, suitable for applications where clearance above the fastening surface is limited.
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📏Wide Diameter Range M1.4–M5 — Covers the most common small-fastener diameters used in electronics, HVAC, and light fabrication, with multiple length options per diameter from 4mm (≈5/32") to 20mm (≈3/4").
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📦Flexible Quantity Options — Available in packs from 5 to 500 pieces per order, practical for both single-unit repairs and small-batch production stocking without over-ordering.
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✚Standard Phillips Drive — Compatible with PH0, PH1, and PH2 bits depending on diameter, working with any standard screwdriver or power driver for consistent, fast installation across all size variants.
📐 Technical Specifications — Pan Head Self-Tapping Screws
| Drive Type |
Phillips (Cross / PH) |
| Head Style |
Pan Head |
| Point Type |
Flat Tail (Self-Tapping, Type A / AB) |
| Material |
A2 Stainless Steel (304) |
| Surface Finish |
Natural Stainless (no additional coating) |
| Thread Diameter |
M1.4 / M1.7 / M2 / M2.2 / M2.6 / M3 / M3.5 / M4 / M5 — See variant options |
| Thread Length |
4mm (≈5/32") – 20mm (≈3/4") — See variant options |
| Quantity per Pack |
5 / 10 / 20 / 50 / 100 / 200 / 500 pcs — See variant options |
| Thread Standard |
Metric (ISO) Self-Tapping |
| Corrosion Resistance |
Good — suitable for indoor, humid, and light outdoor use |
| Recommended Driver Bit |
PH0 (M1.4–M2) / PH1 (M2–M3) / PH2 (M3–M5) — Contact us to confirm |
| Application |
Sheet metal, electronics enclosures, HVAC panels, appliances, precision DIY |
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Please confirm your thread diameter and length before ordering. Self-tapping screws are not interchangeable with machine screws in pre-tapped holes. If you are unsure which size fits your application, contact us before purchasing.
❓ Frequently Asked Questions
How do I choose the right screw length for my application?
A general rule is to select a length that penetrates the base material by at least 2/3 of the screw’s total length. For example, when fastening a 2mm panel, a screw of 5mm (≈3/16") or longer is typically recommended. For thin sheet metal under 1mm, shorter lengths such as 4mm–6mm are generally sufficient. Available lengths range from 4mm (≈5/32") to 20mm (≈3/4") — see variant options above.
How strong are A2 stainless steel self-tapping screws?
A2 (304) stainless steel self-tapping screws generally provide good tensile strength for light to medium-duty fastening in sheet metal, electronics enclosures, and appliance assembly. They are not typically rated for heavy structural loads. For high-stress or high-vibration applications, a larger diameter or a higher-grade fastener is generally recommended.
Can these screws be used outdoors or in humid environments?
Yes. A2 304 stainless steel offers good corrosion resistance suitable for most outdoor and humid indoor environments, and is generally resistant to rust under normal atmospheric conditions. For marine or highly corrosive environments, A4 (316) stainless steel is typically the recommended choice.
Are these compatible with standard Phillips screwdrivers and power bits?
Yes. These use a standard Phillips (cross) drive compatible with PH0, PH1, or PH2 bits depending on the screw diameter. Smaller sizes such as M1.4–M2 typically use PH0 or PH1 bits, while M3–M5 generally use PH1 or PH2. Any standard manual or power screwdriver with the correct bit size will work.
Do I need to pre-drill a hole before driving these screws?
These are self-tapping screws with a flat tail point designed to cut their own threads in thin sheet metal. In most cases, no pre-drilling is required for thin-gauge sheet metal. For harder or thicker materials, a pilot hole is generally recommended to prevent stripping or cracking the base material.
What does ‘flat tail’ mean on a self-tapping screw?
A flat tail (also called a blunt point or Type A/AB point) means the screw tip is slightly blunted rather than sharply pointed. This design is typically used in thin sheet metal applications where the screw needs to locate in a punched or drilled hole before driving, reducing the risk of the tip skipping or damaging the workpiece surface during installation.
Which size should I choose for electronics or appliance assembly?
For electronics and small appliance assembly, M1.4–M2 screws are typically used for PCB covers and thin panels, while M2.5–M3 are common for chassis and enclosure fastening. M4–M5 are generally used for heavier brackets or structural panels. Always verify your component’s thread size specification before ordering.
🛒 Select your material, diameter, and length above, then add to cart — ships from our US warehouse.
