M20, Hex Bolt, A2/ 304 Stainless (Over 130mm), DIN 931.
M20, Hexagon/ Hex Head Bolts, A2 / 304 Stainless Steel, DIN 931
Fixaball sells all sizes, materials and finishes of hexagon head, shoulder bolts, at the best internet prices
Standard, Free Delivery is Royal Mail, 2nd Class (2-5 days, most likely 2 days). For a faster delivery time, select 1st class or courier at checkout. Packs weighing under 250grams are upgraded to 1st class as much as possible,
Please choose your size and pack quantity from the drop down menus.
Lengths available: 130mm, 140mm, 150mm, 160mm, 170mm, 180mm, 190mm, 200mm, 220mm, 230mm, 240mm, 250mm, 260mm, 280mm, 300mm
Bolt vs Set Screw
A set screw fastens materials together by twisting it directly through the latest component material, into a pre-threaded hole, pulling everything together. A shoulder bolt fastens materials by passing them through pre drilled holes in the adjoining materials and cramping them between the head at one end and a nut on the other. Additional washers are often used to spread the load further. A set screw is fully threaded from underneath the head and a bolt is partially threaded (has a part-plain shank). A bolt is used when you know the length you need and a set screw can be used as a bolt if you need more flexibility in the length.
Head Type
Hexagon Head.
Spanner Sizes
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FIXABALL – Specialist Fixings and Fasteners Spanner Sizes METRIC - Hexagon Head Bolts/ Sets |
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Thread Size/ Diameter |
Spanner Size |
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M3 (3mm) |
5.5mm |
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M4 (4mm) |
7mm |
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M5 (5mm) |
8mm |
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M6 (6mm) |
10mm |
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M8 (8mm) |
13mm |
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M10 (10mm) |
17mm |
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M12 (12mm) |
19mm |
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M14 (14mm) |
22mm |
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M16 (16mm) |
24mm |
Threads
This listing is for standard coarse thread, shoulder bolts.
Metric Threads are measured in Millimetres (mm) units and were developed to simplify the imperial systems. Europe moved to this system but the Americans choose Imperial as their default. A coarse thread has less helical coils per mm and a fine one has more. Coarse is used for heavier loads and fine is used for lighter loads prone to vibrations.
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Metric Threads/ Pitches |
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Fixaball – Specialists in Fixings and Fasteners |
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Pitch / Thread Types |
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Size |
Standard/ Coarse |
Fine |
Super Fine |
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M1.6 |
0.35 |
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M2 |
0.4 |
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M2.5 |
0.45 |
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M3 |
0.5 |
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M4 |
0.7 |
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M5 |
0.8 |
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M6 |
1.0 |
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M7 |
1.0 |
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M8 |
1.25 |
1.0 |
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M10 |
1.5 |
1.25 |
1.0 |
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M12 |
1.75 |
1.5 |
1.25 |
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M14 |
2.0 |
1.5 |
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M16 |
2.0 |
1.5 |
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M18 |
2.5 |
2.0 |
1.5 |
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M20 |
2.5 |
2.0 |
1.5 |
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M22 |
2.5 |
2.0 |
1.5 |
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M24 |
3.0 |
2.0 |
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M27 |
3.0 |
2.0 |
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M30 |
3.5 |
2.0 |
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M33 |
3.5 |
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M36 |
4.0 |
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M39 |
4.0 |
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M45 |
4.5 |
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M52 |
5.0 |
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M56 |
5.5 |
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Fixaball shoulder bolts are also available in the following materials:
High Tensile (8.8, 10.9, 12.8), Zinc Plated, Brass, A2 Stainless (regular), A4 Stainless (marine)
Image is for illustrative purposes only.
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