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Screws · ISO 7047 · Application guide

What Are Phillips Oval Countersunk Head Machine Screws, Metric Used For?

Typical applications, the industries that specify phillips oval countersunk head machine screws, metric, and how to choose the right size, material and finish for the joint.

Phillips Oval Countersunk Head Machine Screws, Metric are used for a raised countersunk machine screw with a Type H cross recess for fast assembly and a domed finish. They are manufactured to ISO 7047, and the choice of size, property class and finish is driven by the load in the joint and the environment it sits in.

Primary duty
A raised countersunk machine screw with a Type H cross recess for fast assembly and a domed finish
Governing standard
ISO 7047
Thread size range
M1.6 to M10
Category
Screws

Application notes are general engineering guidance. Verify the property class and any approval requirement against your own design calculation.

What Are Phillips Oval Countersunk Head Machine Screws, Metric Used For? application image

Phillips Oval Countersunk Head Machine Screws, Metric are used primarily for a raised countersunk machine screw with a Type H cross recess for fast assembly and a domed finish. This page lists the industries and assemblies where they are specified, the selection criteria that matter for each application, installation practice, and the cases where a different fastener type is the correct choice. Parts are supplied to ISO 7047. Stocked across roughly M1.6 to M10, they cover general to heavy-duty work.

Typical Applications for Phillips Oval Countersunk Head Machine Screws, Metric

The most common settings where these are specified:

  • Electrical accessories: faceplates fixed at volume.
  • Household appliances: visible panels with a finished head.
  • Lighting fixtures: covers and reflectors.
  • Vehicle interiors: trim held by countersunk fixings.

How to Specify Phillips Oval Countersunk Head Machine Screws, Metric for Your Application

  • Size: Match the nominal size to the mating thread or hole. This product spans M1.6–M10; check the full table below for the exact dimensions of each size.
  • Drive & head: Pick the drive (socket, cross, slot) and head style for the tool access and seating surface; a recessed drive resists cam-out under power tools.
  • Environment: For damp, coastal or chemical exposure prefer A4/316 stainless or a suitable coating; indoors, plated steel or A2 is usually sufficient.
  • Standard: This product is supplied to ISO 7047. Quoting the standard on your order guarantees interchangeable dimensions between suppliers.

Installation & Assembly Practice

  • Match the driver exactly to the recess (PH ≠ PZ; hex key sizes per ISO 2936) and keep the tool axial — side load is the main cause of stripped drives.
  • In tapped holes, engage a thread length of at least 1× the nominal diameter in steel, 2× in aluminum.
  • Set power tools to a torque that seats the head without embedding it into the mating surface.

Common Selection Mistakes with Phillips Oval Countersunk Head Machine Screws, Metric

  • Under-sizing the drive for the installation torque — a small recess at high torque strips before the screw is seated.
  • Using a countersunk head in thin sheet where the countersink removes most of the load-bearing material.
  • Specifying stainless in high-strength duty: A2-70 is roughly class 7 steel, not a 10.9 substitute.

Where Phillips Oval Countersunk Head Machine Screws, Metric Are Not the Right Choice

Not for high-preload structural joints (use a property-class bolt and nut), and not in thin sheet where a self-drilling or self-tapping type suits better.

Custom manufacturing · Made to drawing

Need a phillips oval countersunk head machine screws, metric outside the standard range?

Material and finish are usually what drives a special — a grade the standard part is not stocked in, or a coating chosen against a salt-spray figure instead of a default. Made by cold heading or warm forging.

Minimum order from 2,000 pieces; samples within 7 days of drawing approval.

Custom screw manufacturingSend a drawing

Technical Drawing

Customize the parameters below — every spec field is editable, and the drawing redraws to match the values you choose. Changing the size will snap the other fields to that size's standard values; you can then override any individual value.

Dimensioned line drawing of M1.6 Phillips Oval Countersunk Head Machine Screws, Metric to ISO 7047. Side view and top view, drawn to the dimensions in the table below and redrawn for any size selected.
Pitch P (mm)
0.35
a (mm)
0.7
b (mm)
25
Head diameter dk (mm)
3.6
csh_diam (mm)
2.8
csh_height (mm)
1.0
n_min (mm)
0.46
r (mm)
0.2
t_mean (mm)
0.4
x (mm)
0.9
Length range l (mm)
3~16
Sends the selected values to the quote form below.

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The form below follows the current technical drawing configuration. Change the drawing values above and the request details update automatically.

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Specification
Business Information

Dimensions & Specifications (ISO 7047)

SizePitch P (mm)a (mm)b (mm)Head diameter dk (mm)csh_diam (mm)csh_height (mm)n_min (mm)r (mm)t_mean (mm)x (mm)Length range l (mm)Reference standard
M1.60.350.7253.62.81.00.460.20.40.93~16ISO 7047
M20.40.8254.43.61.20.560.30.51.03~20ISO 7047
M2.50.450.9255.54.51.50.660.30.61.13~25ISO 7047
M30.51.0256.35.31.650.860.40.71.254~30ISO 7047
(M3.5)0.61.2388.27.12.351.060.41.01.55~35ISO 7047
M40.71.4389.48.22.71.260.51.11.755~40ISO 7047
M50.81.63810.49.22.71.260.61.22.06~45ISO 7047
M61.02.03812.611.23.31.660.71.42.58~60ISO 7047
M81.252.53817.315.64.652.061.02.03.210~60ISO 7047
M101.53.03820.018.15.02.561.22.33.812~60ISO 7047
Inside the plant

Manufactured in our own plant

This part is cold-formed, threaded, heat-treated and finished in-house. The stages below are where its class and finish are actually decided.

  1. Wire rod feeding into a cold heading machine
    01

    Cold heading

    Wire rod is drawn to size and cold-formed into blanks. Forming rather than cutting keeps the grain flow continuous around the head, which is where a bolt is most likely to fail.

    Head dimensions and under-head radius checked at set-up and per shift.

  2. Thread rolling machine producing bolt threads
    02

    Thread rolling

    Threads are rolled between hardened dies rather than cut. Rolled threads are stronger in fatigue than cut threads and hold pitch and flank angle far more consistently across a batch.

    Go / no-go ring gauges to ISO 965 tolerance class 6g.

  3. Baskets of bolts staged for heat treatment
    03

    Heat treatment

    Quench-and-temper brings carbon and alloy steel to the property class ordered — 8.8, 10.9 or 12.9 — with the furnace charge tracked so a finished lot can be traced back to it.

    Core hardness and tensile tested per lot to ISO 898-1.

  4. Zinc plated bolts in a treatment basket
    04

    Surface treatment

    Zinc, zinc-nickel, hot-dip galvanizing, black oxide, phosphate and Dacromet, selected against the service environment rather than against the price list.

    Coating thickness and neutral salt spray hours to ISO 9227.

Frequently Asked Questions

What are Phillips Oval Countersunk Head Machine Screws, Metric used for?

A raised countersunk machine screw with a Type H cross recess for fast assembly and a domed finish. They are supplied to ISO 7047.

Which industries use Phillips Oval Countersunk Head Machine Screws, Metric?

They are commonly specified in electrical accessories, household appliances and lighting fixtures, among other sectors.

How do I choose the right size of Phillips Oval Countersunk Head Machine Screws, Metric?

Match the nominal size to the mating thread or hole. This product is available from M1.6 to M10; the full dimension table on this page lists each size.

What drive type do Phillips Oval Countersunk Head Machine Screws, Metric use?

Drive depends on the head style — socket (hex key), cross (Phillips/Pozi) or slot. A recessed drive resists cam-out when driven with power tools; check the product head style on this page.

Can I get a quote for Phillips Oval Countersunk Head Machine Screws, Metric in the size and material I need?

Yes. Use the technical drawing and quote form on this page to set the size and options, then send the exact configuration to our team for pricing and lead time.