Home » Phillips Raised Countersunk Screws (GB820-2015 / DIN 966 / ISO7047) - Marine Stainless Steel (A4)

Phillips Raised Countersunk Screws (GB820-2015 / DIN 966 / ISO7047) - Marine Stainless Steel (A4)

Phillips Raised Countersunk Screws (GB820-2015 / DIN 966 / ISO7047) - Marine Stainless Steel A4 (SUS316)

FULLERKREG Phillips raised countersunk head screws (oval head) conform to GB820-2015, DIN 966, and ISO 7047 standards. Manufactured from A4 marine stainless steel (SUS316) with a passivated and brightened surface finish, these screws combine a flush-seating countersunk base with a low-profile domed top. The addition of molybdenum in SUS316 provides superior resistance to chloride corrosion, making them the preferred choice for marine, coastal, chemical, and food-processing environments.

Product Overview

Product Name Phillips Raised Countersunk Head Screws (Oval Head)
Standards GB820-2015 / DIN 966 / ISO 7047
Material A4 Marine Stainless Steel (SUS316 / 1.4401)
Surface Treatment Passivated and Brightened (Natural Silver)
Drive Type Phillips (Cross / PH)
Head Type Raised Countersunk (Oval Head)
Size Range M2 to M10
Length Range 3 mm to 80 mm
Property Class A4-70
Packaging Bulk Bag / Box (MOQ applies)

Key Features

  • Triple-standard compliance: GB820-2015, DIN 966, ISO 7047 - globally interchangeable
  • A4 Marine Stainless Steel (SUS316): Superior chloride and corrosion resistance vs. A2 - ideal for marine and chemical environments
  • Molybdenum-enhanced alloy: 2-3% Mo content dramatically improves pitting and crevice corrosion resistance
  • Raised countersunk (oval) head: Flush-seating base with decorative domed top for a clean finish
  • Phillips drive: Cross-shaped recess for easy alignment and high-torque driving
  • Passivated and brightened surface: Enhanced corrosion resistance and aesthetic appearance
  • Wide size range: M2 to M10, lengths from 3 mm to 80 mm
  • Wholesale and bulk supply: Competitive pricing for OEM, MRO, and distribution

Standard Comparison

Standard Region Full Name Equivalence
GB820-2015 China Phillips Raised Countersunk Head Screws (Chinese National Standard) Equivalent to ISO 7047
DIN 966 Germany / Europe Cross-Recessed Raised Countersunk Head Screws (Linsenkopfschrauben) Superseded by ISO 7047
ISO 7047 International Raised Countersunk Head Screws - Phillips Drive International reference standard

Dimensional Drawing

The raised countersunk (oval) head features a 90 degree countersunk angle with a convex dome on top. Length is measured from the bearing surface (underside of head bevel) to the tip of the shank.

[ Please insert technical dimensional drawing image here ]

Dimensional Data (GB820-2015 / DIN 966 / ISO 7047)

All dimensions in mm. Tolerances per standard specification.

Thread d Pitch p (mm) Head Dia. dk (max) Head Height k (ref) Dome Height f (ref) Recess No. H Recess Depth m (min) Shank Dia. ds Length Range l (mm) Unit Weight (g/pc) approx.
M2 0.40 4.0 1.2 0.5 PH1 0.6 2.0 3 - 20 -
M2.5 0.45 5.0 1.5 0.6 PH1 0.7 2.5 4 - 25 -
M3 0.50 6.0 1.65 0.7 PH1 0.9 3.0 5 - 30 -
M3.5 0.60 7.0 1.93 0.8 PH2 1.1 3.5 6 - 35 -
M4 0.70 8.0 2.20 0.9 PH2 1.3 4.0 6 - 50 -
M5 0.80 10.0 2.50 1.1 PH2 1.5 5.0 8 - 60 -
M6 1.00 12.0 3.00 1.3 PH3 1.8 6.0 10 - 70 -
M8 1.25 16.0 4.00 1.7 PH3 2.3 8.0 12 - 80 -
M10 1.50 20.0 5.00 2.1 PH4 2.8 10.0 16 - 80 -

* Unit weight (g/pc) column reserved - to be filled with measured values. All dimensions per GB820-2015 / DIN 966 / ISO 7047. Tolerances apply per standard.

Length Selection Guide

Standard available lengths (mm) for each thread size. Y = standard available length.

Length (mm) M2 M2.5 M3 M3.5 M4 M5 M6 M8 M10
3 Y
4 Y Y
5 Y Y Y
6 Y Y Y Y Y
8 Y Y Y Y Y Y
10 Y Y Y Y Y Y Y
12 Y Y Y Y Y Y Y Y
14 Y Y Y Y Y Y Y
16 Y Y Y Y Y Y Y
20 Y Y Y Y Y Y Y Y
25 Y Y Y Y Y Y Y Y
30 Y Y Y Y Y Y Y
35 Y Y Y Y Y Y
40 Y Y Y Y Y
45 Y Y Y Y Y
50 Y Y Y Y Y
55 Y Y Y Y
60 Y Y Y Y
70 Y Y Y
80 Y Y

A4 vs A2 - Why Choose Marine Grade?

Property A2 (SUS304) A4 (SUS316)
Molybdenum Content None 2.0 - 3.0%
Chloride Resistance Good Excellent
Pitting Resistance Moderate Superior
Marine / Coastal Use Limited Recommended
Chemical Environments Moderate Superior
Food and Pharma Use Acceptable Preferred
Property Class A2-70 A4-70

Material and Mechanical Properties

Property Value / Grade
Material Grade A4 (SUS316 / 1.4401 / 0Cr17Ni12Mo2)
Property Class A4-70
Tensile Strength (Rm) 700 MPa min.
Yield Strength (Rp0.2) 450 MPa min.
Elongation (A) 40% min.
Hardness (HV) Max 250 HV
Chromium Content 16.5 to 18.5%
Nickel Content 10.0 to 13.0%
Molybdenum Content 2.0 to 3.0%
Magnetic Slightly magnetic (work-hardened)
Surface Treatment Passivated and Brightened (Natural Silver)
Corrosion Resistance Superior - excellent in marine, chloride, and chemical environments
Operating Temperature -196 deg C to +800 deg C (intermittent)

Product Photos

[ Photo 1 ] [ Photo 2 ] [ Photo 3 ] [ Photo 4 ]

Typical Applications

  • Marine and Offshore: Boat fittings, deck hardware, hull fasteners, offshore platforms
  • Coastal Construction: Facades, handrails, and structural fastening in salt-air environments
  • Chemical Processing: Equipment assembly in acidic or chloride-rich environments
  • Food and Beverage: Hygienic fastening in processing plants and commercial kitchens
  • Pharmaceutical: Clean-room and sterile environment fastening
  • Swimming Pools: Pool equipment, ladders, and fittings exposed to chlorinated water
  • Electronics and Appliances: Panel assembly, enclosure covers, control boxes
  • General Engineering: Wherever superior corrosion resistance and a decorative flush finish are required

Ordering Information

Parameter Details
Part Number Format GB820 - M[size] x [length] - A4 (e.g. GB820 - M4x20 - A4)
MOQ Contact FULLERKREG for wholesale MOQ and pricing
Packaging Bulk polybag / small box / carton (customizable)
Lead Time Stock items: 3 to 7 days; Custom orders: 15 to 30 days
Certifications Material Test Report (MTR) available upon request; RoHS compliant

Why FULLERKREG?

Factory-direct supply - No middlemen, competitive wholesale pricing
Strict dimensional control - 100% conformance to GB820-2015 / DIN 966 / ISO 7047
Material traceability - Full MTR and chemical composition reports available
Global export experience - Serving customers in Europe, North America, and Southeast Asia
Flexible packaging - Bulk, retail, or custom-labeled packaging available
Fast response - RFQ replied within 24 hours

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