METRIC THREAD

METRIC THREAD

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. 

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Code Description Price Quantity
SSWNM04A4 M4 ST/ST A4 WING NUT
440 In Stock for despatch
£35.20 (exc VAT) per HUND
£42.24 (inc VAT)
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SSWNM06A4 M6 ST/ST A4 WING NUT
70 In Stock for despatch
£55.55 (exc VAT) per HUND
£66.66 (inc VAT)
-
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SSWNM08A4 M8 ST/ST A4 WING NUT
86 In Stock for despatch
£71.20 (exc VAT) per HUND
£85.44 (inc VAT)
-
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SSWNM10-G315A4 M10 ST/ST A4 WING NUT DIN 315 GERMAN
Out of Stock
£1,551.76 (exc VAT) per HUND
£1,862.11 (inc VAT)
-
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SSWNM10A4 M10 ST/ST A4 WING NUT
84 In Stock for despatch
£230.00 (exc VAT) per HUND
£276.00 (inc VAT)
-
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SSWNM12A4 M12 ST/ST A4 WING NUT
4 In Stock for despatch
£358.00 (exc VAT) per HUND
£429.60 (inc VAT)
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