Washers flat GOST 11371-78 M6-M42

The washer - represents a disk with an opening. It is enclosed under a nut, a bolt head for increase in a basic surface, protection of a surface of a detail against zadir at a tightening of a nut, prevention of its self-unscrewing (usually a washer with a cross-section).

Diameter of an opening of a washer is a little more than diameter of carving of the corresponding metric fixture. Washers deliver without covering or with a covering in accordance with GOST 1759.

Washers make flat GOST 11371-78 of steel of brands 08kp, 10kp. Apply in mechanical engineering and instrument making as kontryashchy elements of connection, to reduction of pressure upon a basic surface. Are recommended for use together with bolts, screws and other fasteners.

Washers make spring (Grover) GOST 6402-70 of steel of brands 65G, 70 and 3X13. - it is applied to elimination of a possibility of self-unscrewing of nuts at vibration and other cases. The washer Grover represents the ring made of the tempered steel with a slanting section at an angle ~ 15 ° to a ring axis. The inclination of a section becomes left for the right carving and right for the left carving. Grover's ends are slightly divorced and supplied with sharp edges.