Home » Phillips Countersunk Screws (GB819-2016 / DIN 965H / EN ISO 7046-2) - Marine Stainless Steel (A4)

Phillips Countersunk Screws (GB819-2016 / DIN 965H / EN ISO 7046-2) - Marine Stainless Steel (A4)

Phillips Countersunk Screws (GB819-2016 / DIN 965H / EN ISO 7046-2) — Marine Stainless Steel A4 (SUS316)

FULLERKREG Phillips countersunk head machine screws in A4 marine-grade stainless steel (SUS316 / 1.4401) are manufactured to the triple-standard specification of GB819-2016, DIN 965H, and EN ISO 7046-2. The 90° countersunk head with Phillips (Type H) cross recess delivers a flush-mount profile ideal for marine hardware, chemical processing equipment, offshore structures, food-grade machinery, and any environment demanding superior chloride and corrosion resistance. All screws carry a passivated and whitened (bright) surface finish and meet property class A4-70.

Product Specifications

Attribute Detail
Product Name Phillips Countersunk Head Machine Screw
Standards GB819-2016 / DIN 965H / EN ISO 7046-2
Drive Type Phillips (Cross Recess, Type H)
Head Type Countersunk (Flat Head), 90° included angle
Material A4 Marine Stainless Steel (SUS316 / 1.4401)
Surface Finish Passivated & Whitened (Bright)
Thread Type Metric Coarse Thread (ISO 68-1)
Thread Tolerance 6g per ISO 965-1
Size Range M1.6 – M10
Length Range 3 mm – 80 mm (size-dependent)
Property Class A4-70
Head Angle 90°
Recess Type H (Phillips) per ISO 4757
Brand FULLERKREG

A4 vs A2 — Why Choose Marine Grade?

Property A4 (SUS316 / 1.4401) A2 (SUS304 / 1.4301)
Molybdenum Content 2–3% Mo None
Chloride Resistance Excellent (marine & coastal) Moderate
Pitting Resistance (PRE) ~24–26 ~18–20
Acid Resistance Superior Good
Property Class A4-70 A2-70
Typical Applications Marine, chemical, food, offshore General indoor/outdoor use

Dimensional Data

All dimensions in millimeters (mm). Verified against GB819-2016 / DIN 965H / EN ISO 7046-2 standard drawings. dk = theoretical sharp head diameter; k = head height; a = thread run-out max; b = minimum thread length.

Thread
Size		 Pitch
(mm)		 dk max
(mm)		 dk min
(mm)		 k max
(mm)		 k min
(mm)		 a max
(mm)		 b min
(mm)		 Phillips
Recess No.		 Approx. Unit
Weight (g/100pcs)*
M1.6 0.35 3.0 2.7 0.96 0.74 0.7 — No.0 ~18
M2 0.40 3.8 3.5 1.20 0.94 0.8 — No.1 ~31
M2.5 0.45 4.7 4.4 1.50 1.20 0.9 — No.1 ~56
M3 0.50 5.6 5.3 1.65 1.35 1.0 12 No.1 ~87
M3.5 0.60 6.5 6.2 1.93 1.57 1.1 14 No.2 ~133
M4 0.70 7.5 7.2 2.20 1.80 1.2 14 No.2 ~190
M5 0.80 9.2 8.9 2.50 2.10 1.5 16 No.2 ~348
M6 1.00 11.0 10.7 3.00 2.60 1.8 18 No.3 ~604
M8 1.25 14.5 14.2 4.00 3.50 2.0 22 No.3 ~1,382
M10 1.50 18.0 17.7 5.00 4.40 2.3 26 No.4 ~2,866

* Unit weights are approximate reference values for A4 stainless steel (density ≈ 7.98 g/cm³) at nominal length. Actual weight varies by length. Contact FULLERKREG for weight certificates on specific lot sizes.

Standard Length Range by Size

Thread Size Available Lengths (mm) Fully Threaded Up To (mm)
M1.6 3, 4, 5, 6, 8, 10, 12, 16 Fully threaded throughout
M2 3, 4, 5, 6, 8, 10, 12, 16, 20 Fully threaded throughout
M2.5 4, 5, 6, 8, 10, 12, 16, 20, 25 Fully threaded throughout
M3 5, 6, 8, 10, 12, 16, 20, 25, 30, 35, 40 ≤ 30 mm
M3.5 6, 8, 10, 12, 16, 20, 25, 30, 35 ≤ 30 mm
M4 6, 8, 10, 12, 16, 20, 25, 30, 35, 40, 45, 50 ≤ 38 mm
M5 8, 10, 12, 16, 20, 25, 30, 35, 40, 45, 50, 55, 60 ≤ 38 mm
M6 10, 12, 16, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70 ≤ 38 mm
M8 12, 16, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 80 ≤ 38 mm
M10 16, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 80 ≤ 38 mm

Selection Guide

Application Scenario Recommended Size Reason
Marine deck fittings & boat hardware M4 – M8 A4 resists salt spray, seawater, and crevice corrosion
Offshore & coastal structures M6 – M10 High chloride resistance, A4-70 strength class
Chemical processing equipment M4 – M10 Mo content resists acids and chloride-bearing media
Food & beverage machinery M3 – M8 Non-reactive, hygienic, easy to clean, flush head
Swimming pool & spa hardware M4 – M8 Chlorinated water resistance superior to A2
Pharmaceutical & medical equipment M2 – M6 Corrosion-free, traceable material certification
Electronics in humid/coastal environments M1.6 – M3 Small flush head, maximum corrosion protection

Standard Reference

These screws are manufactured in full compliance with the following international and national standards:

  • GB819-2016 — Chinese National Standard: Cross recessed countersunk head screws (equivalent to ISO 7046); specifies dimensions, tolerances, and mechanical properties for metric sizes M1.6–M10.
  • DIN 965H — German Standard: Cross-recessed countersunk flat head screws, Phillips recess type H; widely referenced in European industrial procurement.
  • EN ISO 7046-2 — European/International Standard: Cross-recessed countersunk flat head screws, recess type H (Phillips); property class A4-70 for stainless steel grades.

Thread tolerance: 6g per ISO 965-1. Head angle: 90°. Recess type: H (Phillips) per ISO 4757. Material standard: ISO 3506-1 (A4 austenitic stainless steel).

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Why Choose FULLERKREG?

  • 🏭 Direct Manufacturer — Factory-direct pricing with no middlemen markup
  • 📐 Triple-Standard Compliance — GB819-2016 / DIN 965H / EN ISO 7046-2 certified production
  • 🔬 Certified A4 Material — Full mill certificates and material test reports (MTR) available for SUS316 / 1.4401
  • ⚓ True Marine Grade — 2–3% molybdenum content verified; suitable for saltwater and chloride-rich environments
  • 📦 Flexible MOQ & Packing — Bulk bags, plastic boxes, or reels; custom labeling and OEM packaging available
  • 🌍 Global Shipping — Reliable export logistics to 50+ countries with full documentation support
  • ✅ Consistent Quality — 100% dimensional inspection; RoHS & REACH compliant; salt spray test available on request
  • ⚡ Fast Lead Times — In-stock standard sizes ship within 3–5 business days
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