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
NNM03.5T M3.5 TYPE T NYLON INSERT NUT DIN 985 ZINC
Out of Stock
£46.50 (exc VAT) per HUND
£55.80 (inc VAT)
-
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NNM05T M5 TYPE T NYLON INSERT NUT DIN 985 ZINC
2028 In Stock for despatch
£2.80 (exc VAT) per HUND
£3.36 (inc VAT)
-
+
NNM06T M6 TYPE T NYLON INSERT NUT DIN 985 ZINC
2314 In Stock for despatch
£3.90 (exc VAT) per HUND
£4.68 (inc VAT)
-
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NNM08T M8 TYPE T NYLON INSERT NUT DIN 985 ZINC PL
42 In Stock for despatch
£7.40 (exc VAT) per HUND
£8.88 (inc VAT)
-
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NNM10T M10 TYPE T NYLON INSERT NUT DIN 985 ZINC
2911 In Stock for despatch
£16.60 (exc VAT) per HUND
£19.92 (inc VAT)
-
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NNM10T-ZF M10 TYPE T NYLOC NUTS ZINC FLAKE
247 In Stock for despatch
Price Unavailable
-
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NNM12T M12 TYPE T NYLON INSERT NUT DIN 985 ZINC
2164 In Stock for despatch
£26.00 (exc VAT) per HUND
£31.20 (inc VAT)
-
+
NNM16T M16 TYPE T NYLON INSERT NUT DIN 985 ZINC
1494 In Stock for despatch
£45.10 (exc VAT) per HUND
£54.12 (inc VAT)
-
+
NNM18T M18 TYPE T NYLON INSERT NUT DIN 985 ZINC
161 In Stock for despatch
£88.20 (exc VAT) per HUND
£105.84 (inc VAT)
-
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NNM18T-10 M18 TYPE T NYLON INSERT NUT DIN 985 ZINC GRD 10
61 In Stock for despatch
£183.67 (exc VAT) per HUND
£220.40 (inc VAT)
-
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NNM20T M20 TYPE T NYLON INSERT NUT DIN 985 ZINC
85 In Stock for despatch
£86.20 (exc VAT) per HUND
£103.44 (inc VAT)
-
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NNM20T-10 M20 TYPE T NYLON INSERT NUT DIN 985 ZINC GRD 10
51 In Stock for despatch
£131.90 (exc VAT) per HUND
£158.28 (inc VAT)
-
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NNM42T M42 TYPE T NYLON INSERT NUT DIN 985 ZINC
5 In Stock for despatch
Price Unavailable
-
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NNM45T M45 TYPE T NYLON INSERT NUT DIN 985 ZINC GRD 8
9 In Stock for despatch
Price Unavailable
-
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