Square Cone Lock Washer

18 8 stainless steel washers have good chemical resistance and may be mildly magnetic.

Square cone lock washer.

Also known as square cone sems screws the washer rotates freely but is permanently attached. Split lock washer sems are preferred when the sems are used with hardened bearing surfaces since the. A curved washer protects delicate surfaces while providing constant tension. Square washers fit into slots and channels and have flat sides to keep them from rotating.

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. Metric dimensions expressed in newton meters n m property class 5 8 screw material. Size 4 40 6 32 8 32 10 32 7309. 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.

All are passivated for added protection against oxidation and corrosion. Length is measured from under the head. They are wider and thicker than most round washers making them good for distributing heavy loads. Split ring lock washer sems metric.

Apex fasteners square cone sems square cone sems offer compensation against vibration and thermal cycling. Split ring lock washer sems inch. They 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.

They prevent loosening from small amounts of vibration. They accept a high clamp load while still maintaining spring action. 316 stainless steel washers have excellent resistance to chemicals and saltwater. The square cone washer provides locking action while avoiding damage to the mating surface.