Locking screws are adjustable fasteners with a threaded barrel and countersunk head. They are used for fine adjustments to a clamp’s tension and to hold a part in place or regulate flow rate. Clips and washers are used to prevent direct contact with vulnerable surfaces. Hose clamp screws tighten hoses to restrict flow, and set screws used in automotive applications may require occasional tightening due to engine vibration. Needle clamp screws hold sewing machine needles in place.
A locking screw is an adjustable fastener with a threaded barrel and countersunk head. Many locking screws look like a common bolt when they are detached from the locking assembly. Clamp screws are often hand-tightened for fine adjustments to a clamp’s tension. The size of the clamp opening gradually decreases as the clamp screw is rotated further into position. Screw clamps are commonly used to hold a part in place or regulate the flow rate through a pipe.
The base of a locking screw can leave a circular indentation on the surface it is pressing against. Clips and washers are often placed between the underside of the clamp screw and any vulnerable surface to prevent direct contact. The protective hardware can be permanently welded to the end of the locking screws or simply slid into place before use. Small rubber pads can increase traction and provide a cushion against the pressure applied by the set screws. Aggressively overtightening a clamp screw can cause damage to the clamp and everything it holds, even if washers and bearings are present.
Hose clamp screws tighten hoses to restrict the flow of liquids and gases. The size of the passage within the tube reduces under the clamp as the base of the screw presses down. A properly applied screw clamp can effectively reduce or stop the flow coming from a pipe without causing damage to the pipe which could lead to a leak. Fully tightened screw clamps can cause excessive pressure to build up in the section of pipe before the clamp.
Set screws used in automotive applications may require occasional tightening due to offset loosening caused by engine vibration. As with many threaded fasteners, the locking screws can become loose from long periods of shaking. Adhesive products applied directly to the threads of a set screw can make its connection and location on the clamp more permanent. Permanently setting the clamp screws with adhesives eliminates the adjustable function of the clamp and makes it difficult to remove without damage.
A needle clamp screw is commonly used to hold a sewing machine needle in place during use. The locking screw is gently tightened onto the dull end of the sewing needle by hand or with a small screwdriver. Tightening a clamp more than necessary could bend a sewing needle and make it unusable for future projects.
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