Square Cone Lock Washer

The square cone washer provides locking action while avoiding damage to the mating surface.

Square cone lock washer.

Split ring lock washer sems inch. They prevent loosening from small amounts of vibration. Metric dimensions expressed in newton meters n m property class 5 8 screw material. A curved washer protects delicate surfaces while providing constant tension.

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. Also known as square cone sems screws the washer rotates freely but is permanently attached. Length is measured from under the head. They are wider and thicker than most round washers making them good for distributing heavy loads.

They accept a high clamp load while still maintaining spring action. Split ring lock washer sems metric. Size 4 40 6 32 8 32 10 32 7309. 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.

All are passivated for added protection against oxidation and corrosion. 18 8 stainless steel washers have good chemical resistance and may be mildly magnetic. 316 stainless steel washers have excellent resistance to chemicals and saltwater. Square washers fit into slots and channels and have flat sides to keep them from rotating.

They may be mildly magnetic. Apex fasteners square cone sems square cone sems offer compensation against vibration and thermal cycling. 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.