M8 White Phillips Countersunk Screws A2 Stainless Steel | 16mm Head

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Sale price$6.11 USD
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In stock (500 units), ready to be shipped

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Description

M8 White Phillips Countersunk Screws — A2 Stainless Steel with 16mm Flat Head for Clean, Flush Installations

When you need a fastener that disappears into a white surface — PVC trim, uPVC window frames, white-painted timber, or composite cladding — a bare stainless screw stands out like a sore thumb. Builders, joiners, window installers, and DIYers who work with white materials need an M8 Phillips countersunk screw that sits flush, resists corrosion, and keeps the finished look clean. These M8 white Phillips countersunk machine screws combine an A2/304 stainless steel core with a white surface coating and a 16mm flat head designed to disappear into countersunk holes.

Each screw features an M8 ISO metric coarse thread (1.25mm pitch), a 90° countersunk flat head with a 16mm (≈5/8") head diameter, and a Phillips (cross) drive. Lengths range from 8mm (≈5/16") to 100mm (≈4"), covering short panel-mounting applications through to longer structural passes. Available in quantities of 1, 10, 20, 30, and 50 pieces per order, making them practical for both single-use repairs and small production runs.

These white countersunk M8 screws are commonly used for mounting white PVC fascia boards and trim, securing uPVC window and door frames where screw heads must blend with the frame color, attaching white composite decking or cladding panels, and fastening white-painted MDF or timber where a flush, color-matched finish is required. The 16mm head diameter provides a broad bearing surface that distributes load across the countersunk recess without pulling through soft materials.

🔩 Compatible with M8 ISO metric coarse thread (1.25mm pitch) — fits standard M8 nuts, threaded inserts, and tapped holes per ISO 68-1. Drive: Phillips PH3. Head: 90° countersunk flat, 16mm (≈5/8") diameter. Not compatible with UNC/UNF imperial threads.

✅ Key Features of These M8 White Phillips Countersunk Screws

  • 🤍 White Coating for Color-Matched Installations: The white surface finish allows these screws to blend with white PVC, uPVC frames, painted timber, and composite panels, reducing the visual impact of exposed fastener heads.
  • 🦀 A2/304 Stainless Steel Core: The stainless steel base provides corrosion resistance in indoor and moderate outdoor environments, making these screws suitable for window frames, cladding, and trim applications where moisture exposure is a concern.
  • 📐 16mm Flat Head — Broad Bearing Surface: The 16mm (≈5/8") countersunk head diameter distributes clamping load across a wider area, reducing the risk of pull-through in softer materials like PVC, MDF, and composite boards.
  • ✝️ Phillips Drive for Power Tool Compatibility: The PH3 Phillips cross drive is compatible with standard power drivers and drill bits, allowing fast installation in production or site environments without specialized tooling.
  • 📏 Wide Length Range in One Listing: Lengths from 8mm (≈5/16") to 100mm (≈4") cover the most common M8 countersunk applications, from thin panel mounting to longer through-bolt passes, without needing to source from multiple suppliers.
  • 📦 Flexible Quantity Options: Order as few as 1 piece for a repair or up to 50 for a small project run, with per-unit cost scaling down at higher quantities — useful for window installers and trim carpenters who need varying amounts per job.

🎯 Who Is This For?

🪟 Window & Door Installers

Securing uPVC window frames and door surrounds where exposed screw heads must match the white frame color for a professional, seamless finish.

🏠 Trim & Cladding Carpenters

Attaching white PVC fascia boards, composite cladding panels, and painted timber trim where a flush, color-matched fastener is required.

🔧 DIYers & Home Improvers

Single-piece repairs or small projects — order just 1 or 10 screws for a specific fix without buying a full box of fasteners you won't use.

🏗️ Light Production & Assembly

Small-batch manufacturing or assembly runs using white PVC or composite components where consistent, corrosion-resistant fasteners are needed across multiple units.

📐 Technical Specifications

Thread Size M8
Thread Type ISO Metric Coarse, 1.25mm pitch
Head Type Countersunk (Flat), 90° angle
Head Diameter 16mm (≈5/8")
Drive Type Phillips (PH3)
Material A2 Stainless Steel (304 grade)
Surface Finish White coating over stainless base
Length Range 8mm (≈5/16") – 100mm (≈4")
Length Measurement Overall length (head top to tip)
Available Lengths 8, 10, 12, 14, 16, 18, 20, 22, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80, 90, 100mm
Shank Fully threaded
Tensile Strength Typically ~700 MPa (A2-70 class)
Quantity Options 1, 10, 20, 30, 50 pcs
Coating Type Detail Contact us to confirm
⚠️ Note: For countersunk screws, length is measured from the top of the flat head to the tip — not from under the head. The white coating is applied over the stainless base; avoid over-torquing to preserve the finish on the head.

❓ Frequently Asked Questions

How do I choose the right length for an M8 countersunk screw?

For countersunk screws, length is measured from the top of the flat head to the tip. A general rule is to select a length equal to the thickness of the material being fastened plus at least 1.5× the screw diameter (12mm) of thread engagement in the receiving material. For example, fastening a 10mm panel into a substrate would typically call for a 22–25mm screw. Always pre-drill and countersink to the correct 90° angle for a flush finish.

What strength grade are these A2 stainless steel M8 screws?

A2 stainless steel (304 grade) machine screws typically correspond to property class A2-70, with a tensile strength of approximately 700 MPa. This is generally suitable for light-to-medium duty fastening in non-structural assemblies such as trim, cladding, and window frame installation. For structural or high-load applications, consult an engineer.

Can these white screws be used outdoors?

The A2 stainless steel base offers good corrosion resistance for most outdoor environments. However, the white coating may show wear over time under prolonged UV exposure or in abrasive conditions. For fully exposed outdoor use, inspect the coating periodically. For marine or highly corrosive environments, A4 (316) stainless is generally recommended instead.

What thread standard does M8 use, and what is it compatible with?

M8 uses ISO metric coarse thread with a 1.25mm pitch. These screws are compatible with standard M8 metric nuts, threaded inserts, and tapped holes per ISO 68-1. They are not compatible with UNC/UNF (imperial) threads. The 16mm flat head diameter is consistent across all length variants in this listing.

What screwdriver or bit do I need for Phillips countersunk screws?

M8 Phillips countersunk screws typically require a PH3 (Phillips #3) screwdriver or power driver bit. Using the correct bit size is important to avoid cam-out and damage to the white coating on the screw head. A power driver with adjustable torque control is recommended for consistent, clean installation without stripping the drive recess.

Why choose a white-coated screw over a standard stainless finish?

White-coated screws are chosen when the fastener needs to blend with white surfaces such as PVC trim, white-painted wood, uPVC window frames, or white composite panels. The white finish makes the screw head far less visible after installation, providing a cleaner aesthetic compared to bare stainless steel — particularly important in visible trim and cladding work.

How do I convert the screw length from mm to inches?

Divide the mm value by 25.4. Quick reference: 8mm ≈ 5/16" | 10mm ≈ 3/8" | 12mm ≈ 1/2" | 16mm ≈ 5/8" | 20mm ≈ 13/16" | 25mm ≈ 1" | 30mm ≈ 1-3/16" | 40mm ≈ 1-9/16" | 50mm ≈ 2" | 60mm ≈ 2-3/8" | 70mm ≈ 2-3/4" | 80mm ≈ 3-1/8" | 90mm ≈ 3-9/16" | 100mm ≈ 4".

Is the white finish painted, powder-coated, or a nylon cap?

The white finish is a surface coating applied over the A2 stainless steel base. The exact coating method (paint, powder coat, or nylon/plastic cap) is not specified in the product data. If this detail is critical for your application — for example, for chemical resistance or food-safe requirements — please contact us to confirm before ordering.

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