Hex Cap Screws (Finished Hex Bolts)
About the Product
- Bolt: A bolt is an externally threaded fastener, typically for use through pre designed or drilled holes, typically intended to be tightened or released with use of an appropriately sized nut. A screw has features in it's design which make it capable of being used in a tapped or other preformed hole in the work it is designed for regardless of its use in its service application. Its basic design or features allow it to be tightened or released only by use of an accompanying nut of appropriate size.
- Carbon Steel: Steel which owes its properties chiefly to various percentages of carbon without substantial amounts of other elements; is classified as steel when no minimum content of elements other than carbon content is specified.
- GRADE is typically a reference to hardness. Common fasteners are grade 2, where as grade 8 would be considerably harder.
- HARDNESS is measured in Rockwell or other criteria as may be specified. When discussing hardness, reference needs to be made to core hardness or case hardness. Hardening is often done by choice of carbon steel to be used in production or by heat treatment.
- Stainless Steel: For fasteners is often grade 18-8 which is a 300 grade of stainless with close proximity in properties. It has superior corrosion resistance, is generally non-magnetic and is hardenable only by cold working.
- HIGH STRENGTH steels are typically low alloy steels forming a specific class in which enhanced mechanical properties are obtained by the incorporation of moderate portions of one or more alloying elements other than carbon.
- Zinc Plating: Is a common coating for standard production fasteners, generally used as a rust preventative. The zinc coating will oxidize before the steel of the fastener will. In application, a bond is formed between the zinc and the steel which results in an iron rich alloy.
- HOT DIPPED GALVANIZED is molten zinc that bonds with the steel to produce a bonded alloy coating.
- RUSPERT is a highly corrosion resistant chemical surface treatment that can be offered in a wide range of colors.
- PHOSPHATE is a coating generally applied by electrostatic contact of the chemical with the fastener to produce dry to the touch rust protection, typically for indoor use of the fastener.
- Bolts can be offered as forged with a rolled thread or cold formed with a cut thread. In the case of rolled thread, the thread is applied by mechanical means of a roll thread during the time the bolt is red hot. In the case of cold formed, the thread is cut to measurements determined by the application.
- Hex cap screws are used in a wide range of applications that include machine applications where as hex bolts are more for use where a precision application is desired and where tolerances may need to be more closely adhered to or where mechanical properties are important. Such applications may include construction or structural steel applications.
- Cap screws and hex bolts can be supplied with or without nuts as needed by the end user.
- Depending on size, grade, finish and material desired, normal lead time on delivery is typically 60 days ex factory from time of order.
- Packaging is as diverse as the range of available sizes and can include but not be limited to quarter keg cartons, barrels, retail or blister packs or poly bags as needed.
- Private label packaging can also be discussed.
• Heavy hex screws that may include the following nominal sizes: ½, 5/8, ¾, 7/8, 1, 1-1/8, 1-3/4, 1-3/8, 1-1/2, 1-3/4, 2, 2-1/4, 2-1/2, 2-3/4 or 3. The same nominal sizes are also available in equivalent metric sizes where applications demand.
Heavy hex structural bolts with a similar list of nominal sizes. Normal bolt sizes of ½" with bolt length through 6" will have a length tolerance of -0.12 and - 0.19 on lengths longer than 6". 5/8 will have a length tolerance of -0.12 on bolts less than 6" and -0.25 on those longer than 6", ¾" will have a length tolerance of -0.19 on bolts less than 6" and 0.25 on those longer than 6", while bolts of nominal sizes from 1-1/8" through 1-1/2" will have a length tolerance of -0.25 for both sizes ranging from shorter or longer than 6".
• Large size heavy hex screws typically can be supplied in the following nominal imperial sizes, or in equivalent metric sizes: 3-1/4, 3-1/2, 3-3/4, 4, 4-1/4, 4-1/2, 4-3/4, 5, 5-1/4, 5-1/2, 5-3/4, 6
High strength structural bolts, which will be available in either UNC thread or UN thread depending on nominal sizes chosen. High strength bolts will have head markings to indicate associated strength and may be supplied in sets that include washers and nuts. Plus heads may also include a manufacturers symbol or marking. Such head markings, where applicable include A325 or A 490 assemblies.
• Washers may also be so marked, and may include both flat washers and spring washers depending on applications.
• Square and hex lag screws with nominal sizes ranging from ¼" to 1-1/4 inch with equivalent metric sizes also available.
• Fitting up bolts, askew head bolts, hex flange screws, flange 12 point screws, are other categories that fit within this broader range of cap screws.
• Care should be taken to measure by imperial or metric and avoid measurement by use of gauge.
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