Washers Specifications

Help with Washers specifications:

Type

	Your choices are...
	Belleville Washer		A Belleville washer is a round compact spring that has been pressed into a dish, then hardened and tempered.
	Beveled Washer		A washer with a tapered bearing surface.
	Bowed / Curved Washer		A bowed, or curved washer is a bent spring washer used for axial play take-up.
	C-Washer		Washer that has a slot cut from the center to the perimeter.  Typically the slot is the same width as the "center hole."
	Conical Washer		Conical washers provide great load bearing capacity. They are designed to provide a compensating spring force and sustain a load or absorb shock. Conical washers span holes and maintain high tension in screw and nut assemblies. They are available in plain or toothed periphery styles.
	Constant Force Spacer Courtesy of Temper Corporation		Constant force spacers, also called adjustable spacers or load rings, are used as a shim, wave spring or other spring washer replacement for assemblies requiring accurate bearing settings, including preload.  They are constructed of convoluted, ductile, high strength metal alloys and are available in machined, welded and open ring variations.
	Countersunk / Finishing Washer		Countersunk washers come in a number of shapes: 90 degree countersunk, angle countersunk, flanged, unflanged, rolled flange, etc. Most people are familiar with the finishing type used for cosmetic purposes on many consumer products.
	D-shape Washer		D-shape washers have a flat edge cut away on the parameter.
	Fender Washer		Fender washers have a large outside diameter in comparison to the inside diameter.
	Finger Washer		Resilient fingers on the outer periphery assure balanced pressure and directs the pressure away from the I.D.
	Flat / USS Washer		Flat washers are thin, flat, and circular general purpose washers, with a centrally located hole.
	Lockwasher, External Tooth		Lockwashers that have teeth around the outer perimeter of the washer.
	Lockwasher, Helical Spring		Helical spring lockwashers are split rings of metal or steel that when tightened, resist loosening.
	Lockwasher, Internal Tooth		Lockwashers that have teeth around the internal perimeter.
	SAE Washer		The Society of Automotive Engineers approves SAE washers.
	Self-sealing Washer		Self-sealing washers have an elastomer material that is bonded to the washer in order to seal around a bolt or fastener.
	Shoulder Washer		Shoulder washers have a sleeve with the same inner diameter as washer hole.
	Spherical Washer		Spherical washers have a cross-section in the form of a half or partial sphere.
	Square / Rectangle Hole Washer		Washer that has a square or rectangle shaped inside profile.
	Square / Rectangle Washer		Washer that has a square or rectangle shaped outside profile.
	Tab Washer		The washer has a tab(s) that may be bent for the purpose of locking. Tab washers are made in an almost infinite variety of configurations with internal and/or external notches and/or tabs, single or multiple, formed or flat.
	Torque Washer		Torque washers have sharp prongs formed to sink into the mating surface.  These washers are used for anti-rotation between washer and mating surface.
	Wave Washer		Wave washers, also called wave springs, are wavy metal washers designed to provide a compensating spring force and sustain a load or absorb shock.
	Other		Other unlisted, specialized, or proprietary washer type.
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Size

	ANSI Nominal Size
	Your choices are...
	No. 0		Nominal decimal equivalent: .060".  Basic ID .068".
	No. 1		Nominal decimal equivalent: .073".   Basic ID .073".
	No. 2		Nominal decimal equivalent: .086".   Basic ID .094".
	No. 3		Nominal decimal equivalent: .099".   Basic ID .109".
	No. 4		Nominal decimal equivalent: .112".   Basic ID .125".
	No. 5		Nominal decimal equivalent: .125".   Basic ID .141".
	No. 6		Nominal decimal equivalent: .138".   Basic ID .156".
	No. 8		Nominal decimal equivalent: .164".   Basic ID .188".
	No. 10		Nominal decimal equivalent: .190".   Basic ID .203".
	No. 12		Nominal decimal equivalent: .216".   Basic ID .234".
	1/4"		Nominal decimal equivalent: .250".   Basic ID .281".
	5/16"		Nominal decimal equivalent: .312".   Basic ID .344".
	3/8"		Nominal decimal equivalent: .375".   Basic ID .406".
	7/16"		Nominal decimal equivalent: .438".   Basic ID .469".
	1/2"		Nominal decimal equivalent: .500".   Basic ID .531".
	9/16"		Nominal decimal equivalent: .562".   Basic ID .594".
	5/8"		Nominal decimal equivalent: .625".   Basic ID .656".
	3/4"		Nominal decimal equivalent: .750".   Basic ID .812".
	7/8"		Nominal decimal equivalent: .875".   Basic ID .938".
	1"		Nominal decimal equivalent: 1.000".   Basic ID 1.062".
	1-1/8"		Nominal decimal equivalent: 1.125".   Basic ID 1.188".
	1-1/4"		Nominal decimal equivalent: 1.250".   Basic ID 1.312".
	1-3/8"		Nominal decimal equivalent: 1.375".   Basic ID 1.438".
	1-1/2"		Nominal decimal equivalent: 1.500".   Basic ID 1.562".
	1-5/8"		Nominal decimal equivalent: 1.625".   Basic ID 1.750".
	1-3/4"		Nominal decimal equivalent: 1.750".   Basic ID 1.875".
	1-7/8"		Nominal decimal equivalent: 1.875".   Basic ID 2.000".
	2"		Nominal decimal equivalent: 2.000".   Basic ID 2.125".
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	ANSI Metric Size
	Your choices are...
	M 1.6		Minimum ID:  1.95 mm.
	M 2.0		Minimum ID:  2.50 mm.
	M 2.5		Minimum ID:  3.00 mm.
	M 3		Minimum ID:  3.50 mm.
	M 3.5		Minimum ID:  4.00 mm.
	M 4		Minimum ID:  4.70 mm.
	M 5		Minimum ID:  5.50 mm.
	M 6		Minimum ID:  6.65 mm.
	M 8		Minimum ID:  8.90 mm.
	M 10		Minimum ID:  10.85 mm.
	M 12		Minimum ID:  13.30 mm.
	M 14		Minimum ID:  15.25 mm.
	M 16		Minimum ID:  17.25 mm.
	M 20		Minimum ID:  21.80 mm.
	M 24		Minimum ID:  25.60 mm.
	M 30		Minimum ID:  32.40 mm.
	M 36		Minimum ID:  38.30 mm.
	Search Logic:		Products with the selected attribute will be returned as matches. Leaving or selecting "No Preference" will not limit the search criteria for this question; products with all attribute options will be returned as matches.
	Inside Diameter		Inside diameter of washer.
	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.
	Outside Diameter		Outside diameter of washer.
	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.
	Thickness / Working Height		This dimension refers to either the thickness of the washer material, or the working height (installed height) for the product.  A flat washer has a constant thickness, while a spring washer can operate over a range of heights.
	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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Material / Finish

	Metallic
	Your choices are...
	Aluminum		A bluish silver-white, malleable, ductile, light, trivalent, metallic element that has good electrical and thermal conductivity, high reflectivity, and resistance to oxidation.
	Brass		Brass comes with good strength, excellent high temperature ductility and reasonable cold ductility, good conductivity, excellent corrosion resistance, good bearing properties and low magnetic permeability.
	Copper Base Alloy / Bronze		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.  Sintered bronze is a porous material, which can be impregnated with oil, graphite or PTFE. Sintered bronze is not suitable for heavily loaded applications but useful where lubrication is inconvenient.
	Copper		A common reddish metallic element that is ductile and malleable and is one of the best conductors of heat and electricity.
	Nickel Base Alloy		A nickel base alloy is a metal alloy composed of nickel and one or more other metals, such as copper.
	Spring Steel		Spring steel is any of a variety of steels that are normally of the high-carbon or alloy type.  They are used in the manufacture of springs because of their high tensile properties. The type of spring steel used depends on the application and type of spring. They range from plain carbon grades in the range 0.5% to 1.00% C., to chromium, chromium-vanadium, nickel-chromium-molybdenum, silicon-manganese and silicon-manganese-chromium-molybdenum types.
	Steel		A commercial iron that contains carbon in any amount up to about 1.7 percent as an essential alloying constituent. It is malleable when under suitable conditions, and is distinguished from cast iron by its malleability and lower carbon content.
	Hardened Steel		Steel may be hardened in a number of ways, including a variety of quenching techniques in oil and water, being passed through induction chambers, etc. Quickly cooling steel during processing freezes, traps and packs the carbon atoms inside the shrunken iron crystals, thereby producing a very hard and brittle metal. Although very hard, it cannot absorb much shock or impact without breaking.
	Stainless Steel		Stainless steel is chemical and corrosion resistant and can have relatively high pressure ratings.
	Titanium		Titanium is a hard, lustrous, silvery, element that is relatively abundant in the Earth's crust.  It is known for its lightness, strength, and corrosion resistance.  For this reason it is used widely in the aerospace industry and the medical fields (e.g., replacement joints).  When alloyed with other metals, especially steel, it adds strength and oxidation resistance.
	Other		Other unlisted, specialized, or proprietary metallic materials.
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	Non-Metallic
	Your choices are...
	ABS		Acrylonitrile butadiene styrene (ABS) is a hard, rigid, thermoplastic polymer. It provides good chemical and creep resistance, and dimensional stability. ABS is used in many industries, in a wide array of applications. It is generally inexpensive, although it is prone to crack when under stress. Common trade names include Cycolac® (GE Plastics), Lustran® (Bayer) and Novodur® (Bayer).
	Acetal		Acetal polymers are semi-crystalline. They offer excellent inherent lubricity, fatigue resistance, and chemical resistance. Acetals suffer from outgassing problems at elevated temperatures, and are brittle at low temperatures. Glass filled, and added lubrication grades are available, flame-retardant grades are not. Brand names include Celcon® (Hoechst Celanese), Delrin® (Dupont), Thermocomp® (LNP), Ultraform® (BASF), and Acetron® (DSM).
	Asbestos		Asbestos is the name of a group of highly fibrous minerals with separable, long, and thin fibers. Separated asbestos fibers are strong enough and flexible enough to be spun and woven. Asbestos fibers are heat resistant, making them useful for many industrial purposes.
	Felt		A cloth made of wool and fur often mixed with natural or synthetic fibers through the action of heat, moisture, chemicals, and pressure.
	Leather		The characteristics of leather include flexibility, toughness and resistance to abrasion. It is composed of high-strength interlocking fibers. There are two main advantages to using leather as a sealing material, its ability to absorb and retain lubricants and its effectiveness sealing against rough surfaces.
	Nylon		Nylon, comprising several grades of polyamides, is a general-purpose material in wide use; it is tough and resistant and has good pressure ratings.
	Polyester		Polyethylene terephthalate, also called polyester fiber, refers to any one of a large family of synthetic polymers composed of at least 85% (by weight) an ester of a substituted aromatic carboxylic acid. General characteristics of this family include high tensile strength; chemical, wrinkle, and abrasion resistance; and ease of drying and washability. Industrial uses include belting, hoses, cords and threads; essentially any application where the fiber must be highly flexible, yet durable. Teflon® is a registered trademark of DuPont Dow Elastomers
	Polycarbonate (PC)		Polycarbonate is an amorphous material with excellent Impact Strength, clarity, and optical properties. Polycarbonate has excellent mechanical properties, and can be molded to tight tolerances. Solvents and petrochemicals attack it, and its weatherability is only adequate. Brand names include: Caliber® (Dow), Lexan® (GE), Makrofol® and Makrolon® (Bayer).
	Polyethylene (PE)		A semi-crystalline (typically around 50%), whitish, semi-opaque commodity thermoplastic that is soft, flexible and tough - even at low temperatures - with outstanding electrical properties but poor temperature resistance. It also has very good chemical resistance but is prone to environmental stress cracking; it has poor UV resistance (unless modified) and poor barrier properties, except to water.
	PVC		Polyvinyl Chloride (PVC) is a widely used material that has good flexibility, smooth surface, and nontoxic qualities. Some grades are used in food and chemical processes due to the inert nature of PVC. Brand names include: ACP® and Dural® (Alpha Gary), Geon® (Geon), Benvic® (Solvay), Flexalloy® (Teknor Apex).
	Polypropylene (PP)		Polypropylene is a thermoplastic material exhibiting excellent cold flow, bi-axial strength, and yield elongation properties. It is similar to PVC but can be used in exposed applications because of its resistance to UV, weathering, and ozone.
	PTFE		Polytetrafluoroethylene (PTFE) is an insoluble compound that exhibits a high degree of chemical resistance and a low coefficient of friction. It is sometimes marketed in proprietary classes of materials such as Teflon®, a registered trademark of DuPont Dow Elastomers.
	Rubber		Synthetic rubber includes many grades such as Norprene®, neoprene, and silicone; these compounds typically exhibit high abrasion resistance and fluid and chemical resistance.
	Other		Other unlisted, specialized, or proprietary non-metallic materials.
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	Finish
	Your choices are...
	Anodize		Anodizing is a process for finishing aluminum alloys that employs electrolytic oxidation of the aluminum surface to produce a protective oxide coating. The anodic coating consists of hydrated aluminum oxide. It is considered resistant to corrosion and abrasion. Conventional coatings are 0.1 to 1.0 mil thick and are mostly transparent, but may be colored.  Anodizing preserves the natural luster, and texture of the metal itself. An anodized coating is hard, durable, will never peel, and, under normal conditions, will never wear through.  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. Used primarily on components where tight tolerances are needed; mostly as a decorative coating.
	Phosphate		A coating produced by a chemical or electrochemical treatment of the metal surface.  The coatings provide corrosion resistance and provide a surface for better adhesion of primers and paints.
	Galvanized		Galvanizing is the practice of immersing clean, oxide-free iron or steel into molten zinc in order to form a zinc coating that is metallurgically bonded to the iron or steel surface. The zinc coating protects the surface against corrosion by providing protection to the iron or steel in two ways. It shields the base metal from the atmosphere and because it is more electronegative than iron or steel, the zinc reacts with corroding agents first, providing a longer service lifetime for the part.
	Nickel Plated		Applying a nickel surface to another material.
	Tin Plated		Applying a tin surface to another material.
	Zinc Plated		Applying a zinc surface to another material.
	Zinc Chromate		Applying a yellow zinc surface to another material.
	Other		Other not listed finish.
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