Washer for cheese head screw | A4 | DIN 433
Washer for cheese head screws DIN 433 in A4 stainless steel is intended for use in applications where limited installation space requires a washer with a reduced outer diameter. The product complies with DIN 433 and is used where controlled load distribution is required under screw heads with a small bearing surface. It is specifically adapted for cylindrical screw heads, such as those conforming to DIN 912 / ISO 4762. The product is suitable for professional installations where corrosion resistance and geometric fit are crucial.
AREA OF APPLICATION
The product is used in industry, machine construction, and marine installations. It is intended for applications where socket head cap screws are used in countersunk or confined spaces and where standard washers according to DIN 125 have too large an outer diameter. The material selection enables use in environments with high humidity, salt exposure, or chemical exposure.
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TECHNICAL SPECIFICATIONS
Product type: Washer
Product family: Small washer for cheese head screws
Material grade: A4
Hardness class: 200 HV
Standard: DIN 433
Surface finish: Plain
Environment: Marine / Outdoor / Indoor
Delivery unit: Piece
FREQUENTLY ASKED QUESTIONS (FAQ)
What is the difference between DIN 433 and DIN 125?
DIN 433 has a smaller outer diameter and is intended for cheese head screws. DIN 125 is a standard washer with a larger outer diameter for general use.
When should DIN 433 be used?
For installations where the space around the screw head is limited or where the screw head has a small bearing surface, such as for socket head cap screws according to DIN 912.
Does DIN 433 fit all screws?
It is dimensioned for metric screws but is optimized for cheese head screws. For hexagon head screws, DIN 125 is typically used.
What is the function of the smaller outer diameter?
It enables installation in tight countersinks and reduces the risk of interference with surrounding components.
Is A4 stainless steel necessary?
A4 is used where high corrosion resistance is required, such as in marine or chemically exposed environments. For dry indoor environments, A2 may be sufficient.