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Steel Hex Bolt, Grade 5, Plain Finish, Hex Head, External Hex Drive, Meets ASME B18.2.1/SAE J429, 12" Length, Partially Threaded, 1/2"-20 Threads, Imported

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Product Specifications
Head Height
5/16  inches
Overall Length
12  inches
Size Name
Thread Size
Thread Coverage
Partially Threaded
Head Size Name
Import Designation
Number of Items
Thread Class
Specification for this product family (See all  products)
Drive Style
External Hex
Material Type
Part Number
Brand Name
Small Parts
Exterior Finish
Specification Met
ASME B18.2.1 , SAE J429
Manufacturer Grade
Grade 5
Head Style
Thread Style
Right Hand
System of Measurement

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Key Features

  • Grade 5 steel is often used in applications where strength is the primary concern
  • Plain surface has no finish or coating
  • 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 and SAE J429 specifications

Package Details

Shipping Weight: 1 pounds
Package Size: 15 x 6.8 x 2.9 inches

Product Description

The grade 5 steel hex bolt has a plain finish and an external hex drive, and meets American Society of Mechanical Engineers ASME B18.2.1 and Society of Automotive Engineers SAE J429 specifications. Grade 5 steel, composed of quenched and tempered medium carbon steel, is often used in applications where strength is the primary concern. The material is magnetic. 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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