This section provides an overview for button head socket cap screws as well as their applications and principles. Also, please take a look at the list of 18 button head socket cap screw manufacturers and their company rankings.
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A button head socket cap screw is a bolt that possesses a hexagonal hole and has a rounded button shape at the top of its head.
Part of the top of the rounded bolt head is cut horizontally, and a hexagonal hole is formed in the cut portion.
Button head socket cap screws are made of stainless steel and iron.
In the case of iron, the surface is generally treated with a black oxide coating or the like.
Button head socket cap screw have a more rounded end than standard hexagon socket head cap screws.
Therefore, they are mainly used in cases where fastening with a hexagonal wrench is required and the top of the head should be low, or in places where the top of the head should not be visible.
Button head socket cap screws are fastened with a hexagonal wrench, so they can be used in places where they need to be tightened strongly or where a screwdriver is not available.
They are also increasingly used in cases where appearance is important, and are often used on the exterior where they are more visible to the public than the interior.
A button head socket cap screw is a bolt with a rounded top and a hexagonal hole with a rounded head. Like the hexagon socket bolt, it is tightened with a hexagonal wrench.
Like the hexagon socket head bolt, it is tightened with a hex wrench.
The height of the top of the head is also different, so care is required in design and selection.
Also, button head socket cap screws are characterized by a lower height and larger width at the top of the head than hexagon socket bolts.
And the surface treatment is a black-dyed treatment in the case of steel.
In the case of button head socket cap screw, the hexagonal wrenches used are smaller than those used for hexagon socket head cap screws of the same nominal diameter, so it is necessary to check the standard when preparing hexagonal wrenches.
The main materials used for button head socket cap screws are steel, stainless steel, and titanium.
As described in the section on proper use, since they are related to strength, they should be carefully considered, especially when designing equipment where human lives are at stake.
Electrical corrosion is also an important factor. If the material of the button head socket cap screw differs from the material of the mating mechanical element or the object to be fixed, a difference in metal potential may result in corrosion. Particular attention should be paid in the case of aluminum and stainless steel.
Tin plating, black oxide coating, trivalent chromate, unichrome plating, chromate plating, nickel plating, chrome plating, dacrotized, etc. are available as surface treatments for button head socket cap screws.
Selection should be made according to the corrosion countermeasure by electric corrosion mentioned above, appearance quality, and price.
If a button head socket cap screw is not used properly, the nut or threaded hole on the mating side may be damaged, or the product or equipment assembled with the button head socket cap screw may be damaged.
To prevent this, the basic concept is:
Even if a button head socket cap screw is used properly, if the button head socket cap screw gradually loosens, the object to be fastened may be dislodged, which may lead to a serious accident involving human life depending on the object to be fastened.
The two most common causes of loosening are:
Tightening a button head socket cap screw strongly to prevent loosening is effective, but it can also cause the button head socket cap screw to break or the threaded hole to fracture. Especially when designing equipment that involves human life, it is necessary to calculate the allowable range of tightening force as described in the section on proper use of button head socket cap screw.
When retightening screws in purchased products, if there is already a defined tightening force regulation, it is sufficient to tighten the screws accordingly.
Other methods to prevent loosening include the use of anti-loosening adhesives, double nuts, and products designed specifically for anti-loosening.
Because the principle of non-loosening is friction, it is difficult to guarantee that it will never loosen. Adequate testing should be considered.
*Including some distributors, etc.
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National Bolt & Nut Corporation is based in Schaumburg, Illinois. National Bolt & Nut is a distributor of bolts, nuts, and related tools, serving the heavy equipment & construction, mining, transportation, automotive, and alternative energy industries. National Bolt & Nut is ISO 9001 certified. National Bolt & Nut product listings include standard and custom nuts, spacers, and washers with assorted head styles. Other offerings include a variety of screws, pins, and sprockets.
Product Components Corp was founded by Joseph Saks in 1962 and operates out of Martinez, California. Product Components is a supplier of all types of plastic fasteners. Product Components provides custom molded, stamped, and machine stamped fasteners including screws, nuts bolts, knobs, washers, spacers, stand-offs, balls, and rivets among others. Product Components combines a full plastic fastener line including screws and bolts with engineered machined or molded component services for industrial applications for industries such as electronic, automotive, medical, aircraft, and food. Additional products include panel fasteners, spacers, standoffs, dowels, and other components for panel hardware.
G-Fast has its roots back to 1989 and is based in Chicago, Illinois. G-Fast is a distributor and custom manufacturer of machine tools and equipment. Product offerings include bolts, screws, nuts, rivets, washers, pins, springs, wireforms, retaining rings, clamps, clips, pins, handles, electronic access tools, hinges, knobs, latches, panel fasteners, quick release pins, and wire management. Parts are available across several standards and materials. G-Fast’s services include custom specialized bolts, screws, and nuts, contract manufacturing, CNC machining, and cold heading.
Coburn-Myers Fastening Systems Incorporated was founded in Trainer, Pennsylvania in 1981. Coburn-Myers manufactures and distributes industrial fasteners and related products. Coburn-Myers focuses both on standard bolts as well as custom designs featuring hundreds of combinations of materials, head styles, heat treatment, secondary operations, and finishes. Types available include hex bolts, heat cap screws, 12-point bolds, and stocked cap screws. Primary product also include buts, fasteners, studs, hand tools, anchors, washers, and other standard products.
MF Supply is a stocking distributor for business, industry, and government. MF Supply specializes in fasteners, hardware, and safety supplies. MF Supply product categories include PPE & safety, brands and equivalents, custom made parts, dowel pins, electronic & panel hardware, inserts, metric, Mil-spec & domestic, nuts & washers, pins, precision shoulder screws, rivets & rivetnut inserts, screw driving tools, screws, self-clinching fasteners, socket products, spacers & standoffs, studs, and other products such as sealants, retaining rings, and screw driving tools.
Bayou City Bolt & Supply Company, Inc. is a provider of industrial-type fasteners to various businesses, consumers, and industries around Houston Texas. These industries include energy production, construction, manufacturing & industrial, and the public sector. Bayou City Bolt offers fasteners in a variety of materials including low-carbon steel and aluminum, various coatings, such as zinc or Teflon coating, and special-order materials such as alloy 30 or bronze. In addition to fasteners, Bayou City Bolt also sells studs, drill bits, and other tools and accessories.
Aspen Fasteners was founded in 1961 and headquartered in Las Vegas, Nevada. Aspen Fasteners is a distributor for industrial fasters. Aspen Fasteners offers an extensive line in both metric and inch standards of anchors, bolts, nuts, screws, washers, rings, pins, pipe plugs, rivets, inserts, rods, studs, spacers, standoffs, panel fasteners, and tools including adapters, drivers anchor setting tools, keys, measuring tools, screwdriver insert bits, and screwdriver power bits. Material types include aluminum, brass, copper, iron, lead alloy, monel nickel copper alloy, nylon, phosphor bronze, plastic, silicon bronze, stainless steel, steel, and zinc.
Metalloy was founded in 1969 and is based in St. Charles, Illinois. Metalloy is a distributor of industrial and construction supplies. Metalloy offers tube & pipe products, PVF, die sets & plates, die & mold tooling, general tooling, steel storage, and SK hand tools. Tube & tube products include mechanical tubing, stainless steel tubing, and piping. PVF includes piping, fittings, flanges, valves, studded outlets, and machined rings. Die sets & plates include parallels, risers, and steel tools. Die & mold tooling include die punches, die buttons, drill busings, and mold components.
Paramount Fasteners was founded in 1988 and is based in Santa Fe Springs, California. Paramount Fasteners supplies both common and rare industry standard nuts, bolts, screws, and other fastener products. Materials that Paramount Fasteners uses include B16, B8, B8M, B16, B7, 16-4, 17-7, Inconel, Hasteloy, and Monel and provided in 300 series stainless steel, 316 stainless steel, brass, bronze, carbon steel, nylon, and plastic. Paramount Fasters also distributes parts that have painted heads, hot dip galvanized, zinc plated, cad plated, black oxided, chrome plated, and flour coated.
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