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Steel Hex Bolt, Grade 8, Zinc Yellow-Chromate Plated Finish, External Hex Drive, Meets ASME B18.2.1, 2" Length, Fully Threaded, 9/16"-18 Threads, Made in US (Pack of 25)

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Product Specifications
Brand Name
Small Parts
Head Size Name
Import Designation
Made in US
Number of Items
Overall Length
2  inches
Part Number
Size Name
Thread Coverage
Fully Threaded
Thread Length
2  inches
Thread Size
Specification for this product family (See all  products)
Drive Style
External Hex
Exterior Finish
Zinc Yellow-Chromate Plated
Specification Met
ASME B18.2.1
Manufacturer Grade
Grade 8
Material Type
Thread Style
Right Hand
System of Measurement

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Key Features

  • Grade 8 steel is often used in applications where strength is the primary concern
  • Zinc yellow-chromate plating offers good corrosion resistance
  • External hex drive tightens from the side with a wrench, enabling use when there is no space above for a driver
  • Meets ASME B18.2.1 specifications
  • Made in USA

Package Details

Shipping Weight: 4.5 pounds
Package Size: 6 x 4.3 x 3.5 inches

Product Description

The grade 8 steel hex bolt has a zinc yellow-chromate plated finish and an external hex drive, meets American Society of Mechanical Engineers ASME B18.2.1 specifications, and is made in USA. Grade 8 steel, composed of quenched and tempered medium carbon alloy steel, is stronger than grade 5 steel and is often used in applications where strength is the primary concern. The material is magnetic. The zinc yellow-chromate plating offers good corrosion resistance. The external hex drive has six flat sides that a wrench can grip to turn the screw from the side, enabling use when there is no space above the head for a driver.

Cap screws and hex bolts are threaded fasteners with thick hex-shaped heads that can be used with threaded nuts or in areas with limited clearance above the tapped (threaded) hole. Cap screws have slightly different dimensions than hex bolts and have a washer face underneath their unflanged hex head to act as a large bearing surface against the mating material.

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