M12 x 37 x 3.3mm Form G Flat Construction Washer, Metric, A2 (304) Stainless Steel, DIN 9021

M12 Corrosion Resistant Form G Flat Washer

Form G flat washer designed for secure, reliable fastening in a wide range of applications. Designed with a 13.27mm internal diameter to fit M12 threaded fasteners.
Manufactured in A2 stainless steel for a high corrosion resistance making them ideal for internal and external applications.

A large heavy-duty washer with an outer diameter that’s up to 3 times the internal diameter which sees them used across many applications. The large external diameter ensures optimal load distribution and protects the surfaces from damage. 

A versatile washer used by professionals and DIY enthusiast for numerous applications. These include construction, building projects, engineering assemblies, automotive, DIY and home improvement.

M12 Form G Flat Washer Specifications

• Size (TD): to fit M12 - 12mm
• Diameter (D): 37mm max
• Inner diameter (ID): 13.27mm max
• Thickness (T): 3.3mm max
• Material: HV140 Mild Steel
• Finish: Bright Zinc Plated
  

Part of a larger range of washers available from Fusion Fixings.

FAQs about Form G Flat Washers

What does A2 stainless steel mean and why is it important?

A2 stainless steel is the term for 304 grade material used for fasteners that require high corrosion resistance and durability in external environments.

Can washers help with vibration and loosening bolts?

Flat washers themselves don’t help with loosening due to vibration etc and are designed to help reduce wear and surface damage. If vibration is a concern, the shakeproof locking washers are worth looking at.

Can these flat washers prevent corrosion or rust in outdoor projects?

Yes, the A2 stainless steel washers provide a high level of corrosion resistance and as such are ideal for most outdoor and construction environments.

What’s the purpose of using a flat washer with a bolt?

The washer spreads the clamping force over a larger surface area, reducing material damage and helping the joint tighten evenly without pulling through the material. These larger From G washers have an external diameter up to 3 times the size of the internal diameter. This offers a larger area and distributes the load over a larger area.

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