Square Cone Lock Washer

A curved washer protects delicate surfaces while providing constant tension.

Square cone lock washer.

Tests have shown that a square cone square dome washer will achieve the same clamp load as a standard conical washer at 30 less torque. They accept a high clamp load while still maintaining spring action. 316 stainless steel washers have excellent resistance to chemicals and saltwater. Also known as square cone sems screws the washer rotates freely but is permanently attached.

Metric dimensions expressed in newton meters n m property class 5 8 screw material. Size 4 40 6 32 8 32 10 32 7309. Material codes steel zinc sz stainless steel ss all. Split lock washer sems are preferred when the sems are used with hardened bearing surfaces since the.

Length is measured from under the head. Besides the single flat washer sems and the double washer sems we have the single split lock washer sems the single external tooth lock washers sems the single internal tooth lock washer sems and the single square cone lock washer sems. The square cone washer provides locking action while avoiding damage to the mating surface. Split ring lock washer sems metric.

They prevent loosening from small amounts of vibration. Split ring lock washer sems inch. All are passivated for added protection against oxidation and corrosion. Approximate tightening torques for machine screw sems with tooth lock washers or square cone square dome washers customary dimensions expressed as inch pounds grade 2 screw material.

They are wider and thicker than most round washers making them good for distributing heavy loads. This fastener is ideal for circuit board applications as well. They may be mildly magnetic. 18 8 stainless steel washers have good chemical resistance and may be mildly magnetic.