!9#Stainless Steel Machine Screw, Button Head, Tamper Resistant Pin-in-Star Drive, #10-24, 1/4" Length (Pack of 100)
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Small Parts
Post Date : Jul 28, 2012 11:17:06
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Machine Screws, also referred to as Machine Bolts, are often used with nuts or driven into tapped holes. They come in a variety of head types and drive styles, but are generally available in smaller sizes.
Stainless steels are used for their corrosion resistance, high-temperature strength, scaling resistance, and low-temperature toughness. These properties account for their extremely wide use in practically every industry. Austenitic Stainless Steels are alloys of iron and carbon that contain between 16% and 30% Chromium, a maximum of 0.15% carbon, along with Nickel (or Manganese), and other alloying elements. The chromium, which helps develop a passive surface oxide film, provides corrosion resistance in stainless steels. Austenitic Stainless Steels are designated by a 3 digit SAE Stainless Steel Grade beginning with the number 3 (e.g. 304, 316). Another common naming convention for Austenitic Stainless Steels are 18/8, 18/10, 18/0, etc. where the 18 refers to the % of Chromium and 8 to the % of Nickel contained in the material.
Button head style fasteners combine the driving ease of a socket cap screw (using hex socket for driving) with the smooth, rounded appearance of a round-head screw. Loosening tamper-resistant fasteners requires rare tools that the average user is not likely to have on hand, often preventing vandalism, theft, or product modifications by untrained users. Although not impossible to obtain, drivers for tamper resistant screws are rare and usually more difficult to find.
A threaded fastener's size name includes information about the major external diameter, followed by the threads per inch, which indicates if it is coarse or fine. Coarse threads are better when working with brittle materials; they are sturdier and are easier to thread and unthread compared to fine. Coarse threading also allows for thicker coatings and platings.
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