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
HNM03D M3 HEX DOME NUT
271 In Stock for dispatch
Price Unavailable
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HNM04D M4 HEX DOME NUT
4844 In Stock for dispatch
Price Unavailable
-
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HNM05D M5 HEX DOME NUT
299 In Stock for dispatch
Price Unavailable
-
+
HNM05DP M5 HEX DOME NUT ZINC PLATED
1042 In Stock for dispatch
£14.30 (exc VAT) per HUND
£17.16 (inc VAT) per HUND
-
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HNM06D M6 HEX DOME NUT
41 In Stock for dispatch
Price Unavailable
-
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HNM06DP M6 HEX DOME NUT ZINC PLATED
7557 In Stock for dispatch
£1.11 (exc VAT) per HUND
£1.33 (inc VAT) per HUND
-
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HNM08D M8 HEX DOME NUT
Out of Stock
£33.00 (exc VAT) per HUND
£39.60 (inc VAT) per HUND
-
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HNM08DP M8 HEX DOME NUT ZINC PLATED
2832 In Stock for dispatch
£27.00 (exc VAT) per HUND
£32.40 (inc VAT) per HUND
-
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HNM10D M10 HEX DOME NUT
61 In Stock for dispatch
£38.40 (exc VAT) per HUND
£46.08 (inc VAT) per HUND
-
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HNM10DC M10 HEX DOME NUT CHROME
Out of Stock
£118.44 (exc VAT) per HUND
£142.13 (inc VAT) per HUND
-
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HNM10DP M10 HEX DOME NUT ZINC PLATED
256 In Stock for dispatch
£53.30 (exc VAT) per HUND
£63.96 (inc VAT) per HUND
-
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HNM12D M12 HEX DOME NUT
Out of Stock
£32.25 (exc VAT) per HUN
£38.70 (inc VAT) per HUN
-
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HNM12DG M12 HEX DOME NUT GALV
12 In Stock for dispatch
£374.60 (exc VAT) per HUN
£449.52 (inc VAT) per HUN
-
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HNM12DP M12 HEX DOME NUT ZINC PLATED
335 In Stock for dispatch
£61.40 (exc VAT) per HUN
£73.68 (inc VAT) per HUN
-
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HNM14D M14 HEX DOME NUT
Out of Stock
Price Unavailable
-
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HNM14DP M14 HEX DOME NUT ZINC PLATED
Out of Stock
£176.00 (exc VAT) per HUN
£211.20 (inc VAT) per HUN
-
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HNM16D M16 HEX DOME NUT
153 In Stock for dispatch
£129.78 (exc VAT) per HUND
£155.74 (inc VAT) per HUND
-
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HNM16DG M16 HEX DOME NUT GALV
Out of Stock
£650.00 (exc VAT) per HUND
£780.00 (inc VAT) per HUND
-
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HNM16DP M16 HEX DOME NUT ZINC PLATED
117 In Stock for dispatch
£113.10 (exc VAT) per HUND
£135.72 (inc VAT) per HUND
-
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HNM20D M20 HEX DOME NUT
Out of Stock
Price Unavailable
-
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HNM20DG M20 HEX DOME NUT GALV
71 In Stock for dispatch
£994.00 (exc VAT) per HUND
£1,192.80 (inc VAT) per HUND
-
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HNM20DNP M20 HEX DOME NUT NICKLE PLATED
Out of Stock
£357.00 (exc VAT) per HUND
£428.40 (inc VAT) per HUND
-
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HNM20DP M20 HEX DOME NUT ZINC PLATED
20 In Stock for dispatch
£232.00 (exc VAT) per HUND
£278.40 (inc VAT) per HUND
-
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HNM24DG M24 HEX DOME NUT GALV
30 In Stock for dispatch
£2,550.00 (exc VAT) per HUND
£3,060.00 (inc VAT) per HUND
-
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HNM24DP M24 HEXAGON DOMED NUTS ZINC PLATED
Out of Stock
£2,000.00 (exc VAT) per HUND
£2,400.00 (inc VAT) per HUND
-
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HNM30DP M30 HEXAGON DOMED NUTS ZINC PLATED
Out of Stock
£4,450.00 (exc VAT) per HUND
£5,340.00 (inc VAT) per HUND
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