Quarter-Turn Clamping Fastener

Fixtureworks^®, a leading North American manufacturer and supplier of clamps, fixturing accessories, machine tool components and rollers & bumpers, has introduced a new  quarter-turn clamping fastener to its One Touch Fastener lineup. The new clamping fastener features an innovative new flat design with a recessed body and knob that make it ideal for clamping in limited spaces.

The QCFC-labeled flat quarter-turn fastener has a diameter of 39 mm and features a recessed body and knob that lie flush with the mounted surface for minimal interference in tight areas. This clamping fastener features visible "on" and "off" markings for safety and produces an audible "click" when fully turned to clamped or unclamped position.

The new flat clamping fastener, with machining spacing tolerance of ±0.1 and repeatability of ±0.3, is made to pair with a locking receptacle, which is available separately. Plate thickness of 6 mm or more can be used with the fastener and receptacle. A clamping and holding force as high as 6.7 lb. (30N) can be achieved.

The new fastener provides positive locking in quick change applications where there is frequent insertion and removal of a fastener. It  allows for consistent fastening force, eliminating under or over tightening by the operator. The fastener is mounted to the fixture and the receptacle is mounted to the base. As the fastener is inserted into the receptacle, the pins on the fastener align with the grooves in the receptacle. The body, knob and spring are made from stainless steel. Four socket head cap screws for mounting are included (M2X0.45 - 5 mm long).

The receptacle is mounted with four recessed countersunk head screws that are included (M2.5x0.45 - 5 mm long).