Square Cone Lock Washer

Apex fasteners square cone sems square cone sems offer compensation against vibration and thermal cycling.

Square cone lock washer.

Also known as square cone sems screws the washer rotates freely but is permanently attached. The square cone square dome washer provides greater spring return and tension at minimum torque tolerances and has the strength to support maximum torque loading. They may be mildly magnetic. All are passivated for added protection against oxidation and corrosion.

They accept a high clamp load while still maintaining spring action. 18 8 stainless steel washers have good chemical resistance and may be mildly magnetic. 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. Split lock washer sems are preferred when the sems are used with hardened bearing surfaces since the.

Material codes steel zinc sz stainless steel ss all. Square washers fit into slots and channels and have flat sides to keep them from rotating. Split ring lock washer sems metric. 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. 316 stainless steel washers have excellent resistance to chemicals and saltwater. Split ring lock washer sems inch. Metric dimensions expressed in newton meters n m property class 5 8 screw material.

A curved washer protects delicate surfaces while providing constant tension. They are wider and thicker than most round washers making them good for distributing heavy loads. 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. This fastener is ideal for circuit board applications as well.