METRIC THREAD

Descriptions

Metric threads, the most widely used general-purpose screw threads globally, are defined by the ISO Metric Screw Thread standard (ISO 68). They are characterized by a symmetric V-shape profile with a 60° flank angle.

Designation System

A metric thread is designated by the letter M followed by its nominal major diameter in millimetres. If the pitch is not the standard "coarse" pitch, it is specified after the diameter, separated by an "x" (or a dash).

M8: Refers to a coarse thread with a nominal diameter of 8 mm (and an implied standard pitch of 1.25 mm).
M8x1: Refers to a fine thread with a diameter of 8 mm and a pitch of 1 mm.

Coarse vs. Fine Threads

Metric threads are available in two primary pitch types, which are not related to manufacturing quality.

Coarse Threads:

Feature a larger pitch (distance between threads).
Are the more common and general-purpose type, widely available and suitable for most applications.
Allow for quick assembly and disassembly.

Fine Threads:

Have a smaller pitch, meaning more threads per unit of length.
Offer enhanced strength and better resistance to loosening from vibration.
Require a longer thread engagement and are often found in automotive and aerospace applications.

Specifications

No detailed specifications are available for this product.

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Code	Description	Price	Quantity
SMSM03012RCP	M3 X 12mm SLOT RSD CSK MACHINE SCREW ZINC 4500 In Stock for dispatch	£210.40 (exc VAT) per THOU £252.48 (inc VAT) per THOU	- +
SMSM03025RC	M3 X 25 SLOT RSD CSK MACHINE SCREW Out of Stock	£111.20 (exc VAT) per THOU £133.44 (inc VAT) per THOU	- +
SMSM03.5030RC	M3.5 X 30 SLOT RSD CSK MACHINE SCREW Out of Stock	£386.50 (exc VAT) per THOU £463.80 (inc VAT) per THOU	- +
SMSM03.5030RCP	M3.5 X 30 SLOT RSD CSK MACHINE SCREW ZINC Out of Stock	£386.50 (exc VAT) per THOU £463.80 (inc VAT) per THOU	- +
SMSM03.5050RC	M3.5 X 50 SLOT RSD CSK MACHINE SCREW Out of Stock	£349.60 (exc VAT) per THOU £419.52 (inc VAT) per THOU	- +
SMSM03.5060RC	M3.5 X 60 SLOT RSD CSK MACHINE SCREW Out of Stock	£511.10 (exc VAT) per THOU £613.32 (inc VAT) per THOU	- +
SMSM04025RCS	M4 X 25 SLOT RSD CSK MACHINE SCREW Out of Stock	£229.90 (exc VAT) per THOU £275.88 (inc VAT) per THOU	- +
SMSM04025RCSP	M4 X 25 SLOT RSD CSK MACHINE SCREW ZINC Out of Stock	£181.30 (exc VAT) per THOU £217.56 (inc VAT) per THOU	- +
SMSM05012RSD	M5 X 12 SLOT RSD CSK MACHINE SCREW Out of Stock	£306.80 (exc VAT) per THOU £368.16 (inc VAT) per THOU	- +
SMSM05012RSDP	M5 X 12 SLOT RSD CSK MACHINE SCREW ZINC Out of Stock	£349.10 (exc VAT) per THOU £418.92 (inc VAT) per THOU	- +
SMSM05020RCN	M5 X 20 SLOT RSD CSK MACHINE SCREW NICKEL Out of Stock	£211.10 (exc VAT) per THOU £253.32 (inc VAT) per THOU	- +

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