Socket Head Cap Screws
Cylindrical socket head screws to ISO 4762, quoted by diameter, pitch, length, property class, material and coating as six separate fields. A screw quoted as M6×20 without the class is half a specification, and the half that is missing is the one that decides the price.
Also searched as: socket head cap screw, allen bolt M6, iso 4762 screw, 12.9 socket screw
Send a drawing, a sample or an OE number and we quote this part type to it. The selection data below is what the quote is built from.
What decides the price
In order of impact8.8 and 12.9 are not the same screw with a different mark. Class changes the steel, the tightening torque and the price.
Plain, zinc plated, zinc flake or stainless. Coating decides corrosion life and whether the fastener is allowed in the assembly at all.
ISO 4762 gives a fully threaded screw only up to a certain length. Above that the thread is part-length, and buyers who need full thread must say so.
Worth checking before you order
The class and coating are the price. Two M6×20 lines with different classes can differ by more than the quantity discount.
Old DIN references are close to ISO but not identical. We quote to the standard named on the order.
Selection data
Confirmed per orderQuoted to your specification
Send a drawing or a samplePart numbers for this subcategory are quoted to order. Send the size, grade and finish you need, or a drawing, and we quote against that.
Questions
Can class 8.8 and 12.9 go on one order?+
Yes, on separate lines. They are different parts and they are priced separately.
Is DIN 912 the same as ISO 4762?+
Close, not identical. Tell us which standard the drawing calls for.
Send the specification, not the product name.
Grade, size, thread standard and coating are what a quote is built from. A product name alone produces a price that changes twice before the order.