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15% Discount: Grade 5 Zinc Plated Steel Carriage Bolt, Oval Head

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Grade 5 Zinc Plated Steel Carriage Bolt, Oval Head

Description

Carriage Bolts or Carriage Screws have a square neck that keeps them from turning once tightened. Use in square holes for wood-to-wood and wood-to-metal fastening. Length is measured from under the head.

Grade 5 fasteners are typically made of medium-carbon steel that is quenched and tempered for added strength. They are commonly used in the automotive industry and other situations in which strength is a moderate concern, and are grade-marked on the head with three radial lines. Alloy Steel is steel that has been alloyed with other materials to improve overall physical properties. Steels are designated by a 4 number SAE Steel grade. The first two digits indicate the primary materials used to form the steel. The last 2 digits identify the percentage of carbon for the alloy (in hundredths). Tensile strength ranges for the alloys typically used in these fasteners range from 170,000 to 180,000 psi (pounds per square inch), making these amongst the strongest of materials.

Similar to a flat-head style, the oval head style has a slightly convex top surface; it is typically used for appearance.

A threaded fastener's size name includes information about the major external diameter, followed by the threads per inch, which indicates if it is coarse or fine. Coarse threads are better when working with brittle materials; they are sturdier and are easier to thread and unthread compared to fine. Coarse threading also allows for thicker coatings and platings.

Specifications


Features

  • Carriage Bolts have a domed head with a square neck to prevent spinning
  • Zinc Plated Steel fasteners are suitable where strength and corrosion resistance are primary considerations
  • Oval head style for recessed finish with a slightly rounded surface
  • Length is measured from under the head

    • Details


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