Screw Thread: A ridge or uniform section in the form of a helix on the external or internal surface of a cylinder, or in the form of a conical spiral on the external or internal surface of a cone. External Thread: An external thread is a thread on the outside of a member. Internal
RoHS, lead-free legislation, also known as the "European Directive 2002/95/EC on the Restriction of the use of certain Hazardous Substances in electrical and electronic equipment", will be enforced throughout the European Community beginning July 1, 2006. Its aim is simply to remove a total of six substances from electrical and electronic equipment (EEE), thereby contributing
The term "Thread Series" refers to the combinations of diameter and pitch in threads, that are applied to specific thread diameters. These combinations differ from each other by the number of threads per inch applied to a series of specific diameters. Over time, there have been as many as 11 standard thread series, but as
Classes of thread fit are one of three factors one must consider when deciding what type of thread is best for a given fastener application. The other 2 are thread form and thread series. We will discuss thread form and thread series in future Tech Tips. Thread fit is a measure of looseness or tightness
I have some fasteners that have mating threads, internal and external. Often, I have a problem loosening and separating the parts. Why is this happening, and how can it be avoided? The most likely cause of this condition is thread "galling" or seizing. This occurs when the surfaces of the mating parts are very abrasive.
I want to use your threaded standoff, Part Number 12040RSS???-12 for a panel thickness of 10 GA sheet steel. I don't want to swage it, and after flaring, the shank must be flush to under-flush. How do I figure the shank length? The countersink will be 82 degrees. We will assume you are countersinking
Recently we had a problem with a plated product, and I overheard someone in Quality Control talking about "Tin Whiskers". What are "Tin Whiskers", and what can I do about this? We have received a number of questions about "tin whiskers" what they are, how they are formed, and how to avoid them. We
I have been using hardware made of 303 stainless steel and when exposed to a salt atmosphere, the parts begin to rust. I need to stay with a stainless material. Is there another type of stainless steel or a stainless process that will better resist rust? Free machining austenitic stainless type 303 is not