(10000 pcs) M4, DIN 7980, Metric, Helical Spring Lock Washers, High Collar, A4 Stainless Steel

DIMENSIONAL ATTRIBUTES | Diameter (Nominal): M4 | Diameter (Dimension): 4mm | Inside Diameter (Nominal): 4.1mm | Outside Diameter (Nominal): 7mm | Thickness (Nominal): 1.2mm | PRODUCT ATTRIBUTES | Category: Helical Spring Lock Washers | System of Measurement: Metric | Brand: Aspen Fasteners | Form and Design: High Collar | Material: Stainless Steel | Material Grade: A4 Stainless Steel | Coating: Uncoated | Origin: Origin Undefined | Standards and Specifications: DIN 7980 | NB: Product images are copyrighted artistic representations which may not reflect the product's exact appearance, proportions and/or relative dimensions.

• Helical spring lock washers are the most common washers used to prevent components from loosening.
• When compressed, the lock washer will twist and flatten. This prevents loosening.
• Designed to be used with socket cap screws.
• A4 stainless steel is functionally equivalent to 316 grade and is also known as "marine grade".
• Stainless steel significantly improves resistance to tarnishing or corrosion.