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
SSHNM04L M4 ST/ST HEX THIN NUT
965 In Stock for despatch
£3.00 (exc VAT) per HUND
£3.60 (inc VAT)
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SSHNM05L M5 ST/ST HEX THIN NUT
223 In Stock for despatch
£4.30 (exc VAT) per HUND
£5.16 (inc VAT)
-
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SSHNM06L M6 ST/ST HEX THIN NUT
359 In Stock for despatch
£4.97 (exc VAT) per HUND
£5.96 (inc VAT)
-
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SSHNM08L M8 ST/ST HEX THIN NUT
28 In Stock for despatch
£12.10 (exc VAT) per HUND
£14.52 (inc VAT)
-
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SSHNM10L M10 ST/ST HEX THIN NUT
1295 In Stock for despatch
£23.00 (exc VAT) per HUND
£27.60 (inc VAT)
-
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SSHNM12L M12 ST/ST HEX THIN NUT
1973 In Stock for despatch
£50.70 (exc VAT) per HUND
£60.84 (inc VAT)
-
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SSHNM14L M14 ST/ST HEX THIN NUT
87 In Stock for despatch
£62.50 (exc VAT) per HUND
£75.00 (inc VAT)
-
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SSHNM16L M16 ST/ST HEX THIN NUT
2 In Stock for despatch
£70.00 (exc VAT) per HUND
£84.00 (inc VAT)
-
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SSHNM18L M18 ST/ST HEX THIN NUT
41 In Stock for despatch
£375.20 (exc VAT) per HUND
£450.24 (inc VAT)
-
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SSHNM20L M20 ST/ST HEX THIN NUT
58 In Stock for despatch
£133.50 (exc VAT) per HUND
£160.20 (inc VAT)
-
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SSHNM24L M24 ST/ST HEX THIN NUT
Out of Stock
£320.00 (exc VAT) per HUND
£384.00 (inc VAT)
-
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SSHNM42L M42 A2 ST/STEEL HEXAGON THIN LOCK NUT
6 In Stock for despatch
£3,700.00 (exc VAT) per HUND
£4,440.00 (inc VAT)
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