M4-0.7 x 6 Metric DIN 7985A Phil Pan Sem type H DIN 127B Split Lockwasher Full Thrd Zinc A325 They feature a round head

They feature a round head with a Type U drive

The hex washer head provides a large bearing surface for increased strength and the slot indent allows for easy driving

This makes it an ideal choice for applications where vibration is a concern

The hexwasher head provides a wider bearing surface than a standard washer head

M4-0.7 x 6 Metric DIN 7985A Phil Pan Sem type H DIN 127B Split Lockwasher Full Thrd Zinc A325 They feature a round headThe M4 0. 7 x 6 Metric DIN 7985A Phil Pan Sem type H DIN 127B Split Lockwasher Full Thrd Zinc is a high quality fastener designed for use in a variety of applications. It is made from durable zinc plated steel and features a Phillips pan head for easy driving. The split lockwasher helps to prevent the fastener from loosening over time. This fastener is ideal for use in applications where vibration or shock is a concern.