Stainless Steel Countersunk Bolt M8 x (1.25mm) x 40mm

Stainless Steel Countersunk Bolt M8 x (1.25mm) x 40mm
exc VAT £3.12 inc VAT £3.74
Part Number: MLSSCS840
exc VAT £3.12 inc VAT £3.74


Stainless Steel Countersunk Bolts M8 x (1.25mm) x 40mm: Simple, shiny, and strong alternatives. Machined with rolled threads for extra strength and quality to give a smoother finish with a 90° countersink cut.

Also available are accompanying countersunk washers. Ideal where a low, wider head profile is required to help spread the load. Ideal in bodywork applications.

This design is also available in Black Stainless Steel which not only looks great but has other benefits too..

This beautiful long lasting black finish results from an application of Diamond Like Carbon Coating (DLC) This gives supreme hardness and corrosion resistance provided by a nano composite coating, which increases the fastener lifetime dramatically and helps to prevent galling. By incorporating them right from the beginning, the overall system cost can be held level or may even be reduced.

Please note that due to this special coating Black Stainless Steel is not identical to our Black Aluminium.

Unsure what size you need? Why not order one of our progauges and double-check? Take a look here

Additional Information

Part No. MLSSCS840
Product Type Bolt
Material Stainless
Weight in Gms 15.6300
Bar Code 5053573764720
Country of Manufacture United Kingdom
Thread Diameter 8mm
Head Style Countersunk
Head Diameter 15.6mm
Head Height 4.95mm
Allen Key Size 5mm
Thread Pitch 1.25mm
Length 40mm
Thread Length 34mm
Shank Length 6mm
Pack Quantity 1

Material Information 

Stainless Steel

Manufactured from A316 stainless steel. A316 stainless steel has a minimum chromium content of 16.5% and contains elements of carbon, molybdenum, silicon, phosphorus, sulphur, nickel, manganese and iron, all of which add properties of formability, strength, weldability and enhanced corrosion resistance. All of the fasteners are highly polished to a mirror-like finish.

  • Density 8030kg/m3 (501lb/ft3)
  • Young's Modulus 193GPa (28 x 106psi)
  • Yield Strength 260MPa (37.7 x 103)
  • Ultimate Tensile Strength 570MPa (82.7 x 103 psi)
  • Compressive Strength 260MPa (37.7 x 103 psi)
  • Shear Modulus78GPa (11.3 x 106 psi)
  • Ductility 40% elongation at break +
  • Minimum value allowed by ASTMA240
  • Poisson's Ratio0.27
  • Hardness 95 Rockwell B+
  • Maximum value allowed by ASTMA240
  • Strength-to-Weight Ratio 32.4 kNm/kg
  • Stiffness-to-Weight Ratio 24.0 Mnm/kg

Black & Gold Stainless Steel: Long lasting finish resulting from an application of Diamond Like Coating (DLC). This unique finish increases the fastener lifetime and helps to prevent galling whilst providing a supreme hardness and offering the optimum in corrosion resistance thanks to a nanocomposite coating.

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