Welcome to Junlin Chicheng Metal Products Group Co., Ltd
External Tooth Lock/Flat/Inner Tooth Lock/Spring Washer
Classification :
Fasteners
Keywords :
Fasteners
PRODUCT DETAILS
| Washer Types | |||
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| Flat A flat washer used to distribute load. Available in SAE, USS, and other patterns. | Fender An oversize flat washer used to further distribute load especially on soft materials. | Finishing A washer used to obtain a 'finished' look. Usually used with oval head screws. | Split Lock The most common style of washer used to prevent nuts and bolts from backing out. |
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| External Tooth Lock A washer with external 'teeth' Used to prevent nuts and bolts from backing out. | Internal Tooth Lock A washer with internal 'teeth' Used to prevent nuts and bolts from backing out. | Square A square shaped washer. | Dock Dock washers have a larger outside diameter and are thicker than standard. |
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| Ogee Thick, large diameter, cast iron washers with a curved or sculpted appearance. Typically used in dock and wood construction | Sealing A neoprene washer bonded to a metal backing. Used to seal out air/water or dampen noise and vibration. | ||
| Fastener material and coating |
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| Fasteners come in a variety of materials. Selecting a material should be based on such considerations as environment (corrosive or temperature extremes), weight, magnetic properties, stresses, reusability, and expected life. Steel: Most fasteners are made from steel. Specifications cover a broad range of mechanical properties that are indicated by a bolt-head marking system that identifies the fastener by grade. For example, SAE grades 2, 5, and 8 are most often specified. Common steels are SAE 1010 (machine screws, carriage bolts, and other fasteners without critical strength requirements); SAE 1018, 1020, 1021 (bright cap screws, special items); SAE 1038 (high-strength bolts, studs, nuts, cap screws); SAE 1041, 1045, 1330, 1340 (special high-strength requirements), and SAE 1100 series (resulfurized -- usually for nuts). Aluminum: Aluminum alloys are the least costly, by volume, of all fastener metals. Aluminum fasteners are classified as hardenable and nonhardenable and weigh about one-third as much as steel. Some grades equal or even exceed the tensile strength of mild steel. The metal polishes to a high luster, has high thermal and electrical conductivity, is nonmagnetic, can be hardened by alloying, and has high corrosion resistance. Typical fastener alloys are 2024-T4 (cold-formed bolts, screws, rivets, machine-screw nuts), 2011-T3 (milled-from-bar nuts, screws, bolts), 1100 (cold-formed rivets), and 6061-T6 (nuts). Brass: This metal is worked easily into shape and has adequate strength. Tensile strength or hardness is improved by cold working. Some brasses have a greater tensile strength than mild carbon steel, along with a higher resistance to corrosion. The metal is nonmagnetic and takes a high luster. Copper: One of the most malleable of all metals, copper also has good corrosion resistance and the highest conductivity of all the nonprecious metals. Copper：One of the most malleable of all metals, copper also has good corrosion resistance and the highest conductivity of all the nonprecious metals. Copper is alloyed with silicon and manganese or aluminum for greater strength. Lead is added to give free-machining qualities. Typical alloys are high-silicon bronze, type A (hot-forged bolts, nuts; milled-from-bar bolts, nuts, setscrews); low-silicon bronze, type B (cold-formed bolts, nuts, rivets, screws); silicon-aluminum bronze (hot-forged products requiring special properties); and cupro-nickel, a copper-nickel alloy used for high strength and resistance to saltwater corrosion. Nickel: Fasteners can be made from commercially pure (99.4%) metal, Monel, or Inconel. They are used where toughness, immunity to discoloration and corrosion, and strength at high temperatures are desired. Pure nickel: Ideal for applications involving contamination, and strength retention at both high and subzero temperatures. Monel: Combines relative economy with adaptability to cold heading and roll threading. |
| Inconel: Excellent for fasteners that must retain high strength and oxidation resistance at temperatures up to 1,600°F. Stainless steels: Fasteners of this metal are used where corrosion, temperature, and strength are problems. They also produce a mirrorlike finish. There are three basic types: Martensitic: Magnetic and hardenable. Common fastener alloys are Types 410, 416, and 431. Ferritic: Magnetic and not hardenable by heat. Can be cold worked with reasonably good results. Used for economic reasons, and where corrosion-resistance requirements are not too severe. Best fastener alloy types are 430 and 430F. Austenitic: Nonhardenable, nonmagnetic, and offers the greatest degree of corrosion resistance. Typical alloys are 18-8 and 300 series. Titanium：Fasteners made from this material are used chiefly on aircraft. Titanium has excellent corrosion resistance and good high-temperature performance. These fasteners are most commonly used in joints loaded in shear but are also used in tension-loaded joints. Beryllium：Exceptionally lightweight, beryllium fasteners are about 40% as heavy as titanium. Brittleness is a limitation to widespread use. Beryllium bolts are used primarily for applications where the shear requirement is at least 60 ksi. |
FACTORY
There are totally 5 factories,600 employees,50 production lines.Our factory covers an area of 80,000 square meters with advanced production equipment, a laboratory, independent R & D, and an innovation department.We have a whole producing& assembly line consisting of medium-frequency electric furnaces, spectrum analyzers, centrifugal molding, annealing, zinc spray, finishing, and packaging.
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Customer praise
With advanced production technology, strict quality control, and a customer-centric business philosophy, the company has established a solid reputation in both domestic and international markets. The products sell well all over the country and are exported to more than 100 countries such as the European Union, the United States, Australia, Southeast Asia, and the Middle East.
Customer Visit
The annual steel processing capacity is several million tons, and it is mainly engaged in the research and development, production and sales of stainless steel series, carbon steel series, aluminum series, copper series, galvanized, color coating, coil, seamless pipe, welded pipe, square pipe, torque pipe, round steel, angle steel, channel steel, I-beam, hexagonal Steel, square steel, flat steel, steel wire, welding rod, flange cutting parts and other stainless steel and high nickel alloy steel. for customers to purchase.
HONOR
Our company has passed ISO9001 quality management system certification, Our Mill product with CE/EN10204 / ASTM/Classification society certificate/CASO etc. We welcome friends from all over the world to visit our factory at any time！
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