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Shoulder Diameter:

Length:

Drive Type:

Tamperproof  / Tamper-resistant Drives:

Material:

Finish:

Fastener Standards:

Help with Shoulder Screws specifications:

Shoulder Diameter
   Shoulder Diameter       The diameter of the shoulder of the screw.  The shoulder is the unthreaded shank, located under the head of the screw that is long in comparison to its threaded portion. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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Length
   Length       The length of the shoulder. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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Drive Type
   Drive Type       
   Your choices are...         
   12-Point       Drives have 12 points of contact and are tightened and loosed with a special wrench. 
   Bristol Spline       Bristol spline drives are recessed drives with four to six splines that prevent wrenches from camming out. Most products have six splines; however, two smaller-sized models have only four spines. 
   Clutch       Clutch drives are recessed and shaped like a bowtie. 
   Hex Socket / Allen       Hex socket drives or Allen drives are six-sided. They are turned with a hexagonal wrench or an Allen wrench.  
   Philips / Frearson       Philips is a recessed, cross-drive system that was designed originally for aluminum screws. During tightening, the mating Phillips screwdriver will slip before the drive strips.   Frearson drives are a cross-drive system more commonly known as ANSI Type II. Frearson drives have a sharper point (73° included angle) than Phillips drives (123° included angle). 
   Posidriv®       Posidriv® (Phillips Screw Company) is a recessed drive called ANSI Type 1A. It is similar to a standard Phillips drive, but has an additional cross-recess at 90°. Posidriv fasteners are well-suited for applications that require high tightening torque because the driver will not slip upon tightening. 
   Slotted       A slotted drive has a standard, slotted recess. This is one of the oldest drive types.  
   Square / Robertson       Square drives or Robertson drives are four-sided, recessed drives. Square drives do not cam out when tightened and allow for four different driver positions. 
   Supadriv®       Supadriv® (Trifast Plc.) is a recessed drive that resembles a Phillips cross-drive, but has a smaller square drive in the center.  A Supadriv driver will turn a Posidriv fastener. 
   Torx®       Torx® is a six-pointed, lobed or star-pattern recess with straight walls. Torx is a registered trademark of the Camcar Corporation, a division of Textron Industries. 
   Other       Other, unlisted, or proprietary drive types. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Tamperproof  / Tamper-resistant Drives       
   Your choices are...         
   One-way Slotted       One-way screw drives are designed to be tightened with a slotted screwdriver. Because they are undercut, one-way screw drives can be removed only with a special tool, or by drilling them out. One-way slotted drives are used on machine and sheet metal screws with round, truss, or oval heads. Sex bolts are also available with one-way slotted drives. 
   Phillips Pin       Phillips pin-head drives are designed like a standard Phillips drive, but have a protruding pin in the center. They are driven by a mating driver with a hollowed point into which the pin fits. 
   Socket Pin       Socket pin-head drives are designed like a standard socket drive, but have a protruding pin in the center. They are driven by a mating driver with a hollowed point into which the pin fits. 
   Spanner       Spanner drives have two holes separated by a fixed distance and are driven by a special mating spanner driver. 
   Torx® Pin       Torx pin-head drives are designed like a standard Torx drive, but have a protruding pin in the center. They are driven by a mating driver with a hollowed point into which the pin fits. 
   Tri-Wing®       The Tri-Wing® (Phillips Screw Company) drive uses a tamper-resistant design and requires a special three-winged driver.  
   Other / Proprietary Tamperproof Drive       Other, unlisted, or proprietary tamperproof drives. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Material / Finish
   Material       
   Your choices are...         
   Aluminum       Aluminum is a bluish, silver-white, malleable, ductile, light, trivalent, metallic element that has good electrical and thermal conductivity, high reflectivity, and resistance to oxidation.  Aluminum is lighter than steel, but not as strong. 
   Brass       Brass provides good strength, excellent high-temperature ductility, reasonable cold ductility, good conductivity, excellent corrosion resistance, good bearing properties and low magnetic permeability. 
   Bronze / Copper Base Alloy       A copper base alloy is metal composed of copper as the main alloying metal and one or more other metals, such as tin, zinc, or phosphorus.  Silicon bronze is one typical fastener alloy. 
   Copper       Copper is a common, reddish, metallic element that is both ductile and malleable. Copper is one of the best conductors of heat and electricity. It also exhibits good corrosion resistance. 
   Molybdenum       Molybdenum is a chemical element with the symbol Mo and an atomic number of 42.  Molybdenum has a very high melting point (the sixth highest of any element) and is commonly used in high-strength steel alloys. 
   Plastic       Products are made of thermoplastic materials. 
   Rubber       Synthetic rubber includes grades such as neoprene, silicone, and Norprene® (Norton Co.). Rubber fasteners are used in specialized applications for vibration damping and silencing. 
   Steel       Steel is a commercial iron that contains carbon in any amount up to about 1.7 percent as an essential alloying constituent. Many grades of carbon and alloy steels are used as fastener materials. Steel may require coating for protection against corrosion. 
   Hardened Steel       Steel can be hardened in a number of ways. Methods include quenching techniques in oil and water, and passing the steel through induction chambers. During processing, the rapid cooling of steel freezes, traps and packs the carbon atoms inside the shrunken iron crystals. The resulting steel is very hard and brittle. Hardened steel is strong, but cannot absorb much shock or impact without breaking. 
   Stainless Steel       Stainless steel is chemical and corrosion resistant and can have relatively high stress ratings. Many grades are used in fasteners. Often, stainless steel does not require an anti-corrosion coating; however, most stainless steels cannot be hardened to the same degree as carbon steels. 
   Superalloy       Superalloys are high-performance alloys that exhibit the following features: mechanical strength, good surface stability, resistance to corrosion and oxidation, and resistance to creep at high temperatures.  Common superalloys include Hastelloy®, Inconel®, Incoloy®, and Monel®. The attributes of Hastelloy® alloys include high resistance to uniform attack and localized corrosion resistance. It also provides stress corrosion cracking resistance, and ease of welding and fabrication. Hastelloy is a registered trademark of Haynes International, Inc. Inconel® and Incoloy® (Special Metals Corporation) provide good strength and excellent resistance to oxidation and carbonization in high temperatures environments, and in many aqueous environments. These proprietary materials are used in process piping, heat exchangers, heating element sheathing and nuclear steam generator tubing. Typically, Inconel and Incoloy are used at service temperatures below 650° C (1200° F). Monel® (Special Metals Corporation) is a proprietary, high-strength alloy that offers resistance to a range of corrosive media, including seawater, hydrofluoric and sulfuric acids, and alkalis.  
   Titanium       Titanium is a hard, lustrous, silvery element that is relatively abundant in the Earth's crust. It is valued for its lightness, strength, and corrosion resistance.  Titanium is used widely in the aerospace industry and in medical products such as replacement joints. When alloyed with other metals, especially steel, titanium adds strength and oxidation resistance. 
   Other       Other unlisted, specialized, or proprietary metallic materials. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Finish       
   Your choices are...         
   Anodize       Anodizing is a process for finishing aluminum alloys that uses the electrolytic oxidation of the aluminum surface to produce a protective oxide coating. The anodic coating consists of hydrated aluminum oxide and is resistant to corrosion and abrasion. Conventional coatings are 0.1 to 1.0 mils thick and are mostly transparent, but may be colored. Anodizing preserves the natural luster and texture of the metal. Anodized coatings are hard, durable, will never peel, and, under normal conditions, will never wear through. Standard and decorative colors are available. This category includes hard-coat anodizing. 
   Black Oxide       Black oxide is a conversion coating that causes virtually no dimensional change. It is a uniform, continuous conversion of the existing metal to a black form of rust. Black oxide is used on components where tight tolerances are needed. It is used mostly as a decorative coating. 
   Chrome       Chrome finish is an electroplated coating that is applied for purposes of lubricity, wear resistance, and decoration. Chrome provides a bright and highly reflective finish. 
   Galvanized       Galvanizing immerses clean, oxide-free iron or steel into molten zinc in order to apply a zinc coating that is metallurgically bonded to the iron or steel surface. The zinc coating protects the surface against corrosion in two ways. First, it shields the base metal from the atmosphere. Second, because zinc is more electronegative than iron or steel, the coating reacts with corroding agents, providing a longer service life for the part. 
   Gold       Gold plating provides total resistance to oxidation and corrosion. It is electrically conductive and can be alloyed with cobalt to produce a wear-resistant finish. 
   Nickel Plated       Nickel plating is a common form of electrolytic deposition. 
   Phosphate       Phosphate coatings are applied via the chemical or electrochemical treatment of a metal’s surface. These corrosion-resistant coatings provide a surface for the improved adhesion of primers and paints. 
   Silver       Silver is the most electrically conductive plating finish. It is used in electronic fasteners for electrical conductivity and signal transmittance. Silver oxidizes rapidly, but resists corrosion. 
   Tin       Tin plating is applied to electronic fasteners that are made of brass. 
   Zinc Plated       Zinc plating is a common form of plating that provides corrosion resistance. 
   Zinc Chromate (Yellow)       Fasteners have a yellow zinc chromate finish. 
   Other       Other unlisted finish. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Fastener Standards
   Fastener Standards       
   Your choices are...         
   AIA / NAS       Dimensional and material standards for aircraft fasteners are developed by the Aerospace Industries Association (AIA) and/or its National Aerospace Standards Committee (NASC). All drawings and specifications have a NAS or NASM prefix. NAS is an acronym for National Aerospace Standards. NASM is an acronym for National Aerospace Standards, Metric. 
   AN / MS       Dimensional standards for aircraft fasteners are developed by the Aeronautical Standards Group. All drawings have a prefix of AN or MS. Products are suitable for army, navy, or air force use.  
   ASME / ANSI       The American Society of Mechanical Engineers (ASME) B18 standard specifies all ASME B18 fastener products with a single 18-digit PIN code system. Approved by the American National Standards Institute (ANSI) and adopted by the U.S. Department of Defense, the ASME B18.24 PIN system is a self-contained code that covers 788 unique B18 fastener types from 72 ASME B18 source documents. The PIN code system is fully parametric, uniform across all fastener types, and is intended as a digital alternative to the traditional plain text fastener product callout prescribed in the "Designation" or "Ordering" section of the applicable source document. 
   BS       Dimensional and material standards developed by the British Standards Institution.  Standards are designated with a BS prefix.  The British Standards International (BSI) Kitemark indicates that products are tested regularly against the requirements of an appropriate BSI standard, and that the manufacturer's quality system is assessed at least twice a year to ensure continued quality production.  
   DIN       DIN is an acronym for Deutsches Institut für Normung (DIN), a German national organization for standardization. Most metric fasteners are manufactured according to DIN standards. Although DIN predates the International Standards Organizations (ISO), DIN standards are being revised to more closely match ISO standards. Ordering DIN fasteners requires three pieces of information: the DIN identifier, which defines the style of the fastener; the material (e.g., 8.8 Steel, 316 Stainless, Hastelloy C276); and the coating or plating (if any). 
   ISO       The International Standards Organization (ISO) is a worldwide federation of national standards organizations from over 100 countries. ISO's mission is to facilitate the international exchange of goods and services, and to foster cooperation in the spheres of intellectual, technological, and economic activity. ISO standards for metric fasteners are gaining recognition rapidly. They will probably become global standards. 
   JIS       Japanese Industrial Standard (JIS) is largely based on DIN; however, some standards have been modified to meet the needs of the Japanese market. Most of the fasteners used in electronic equipment manufactured in Japan comply with the JIS standard. 
   SAE       Fasteners meet standards developed by the Society of Automotive Engineers (SAE), a worldwide organization that establishes industry standards for the testing, measurement, and design of automobiles and their components. 
   Other       Other unlisted, specialized, or proprietary fastener standards. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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