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Steel Hex Bolt, Grade 5, Zinc Plated Finish, Serrated, Hex Head, External Hex Drive, Meets IFI 111/SAE J429/ASTM B633, 3" Length, Fully Threaded, 1/2"-13 UNC Threads (Pack of 5)

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Product Specifications
Brand Name
Small Parts
Flange Diameter
1-5/64  inches
Head Diameter
3/4  inches
Head Height
33/64  inches
Number of Items
Overall Length
3  inches
Part Number
Size Name
Thread Class
Thread Coverage
Fully Threaded
Thread Size
Thread Style
Specification for this product family (See all  products)
Drive Style
External Hex
Exterior Finish
Zinc Plated
Specification Met
IFI 111 , SAE J429 , ASTM B633
Manufacturer Grade
Grade 5
Material Type
Head Style
Style Name
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
  • Zinc plating resists corrosion and has a reflective appearance
  • Flange hex head has a serrated flange for additional grip on the mating surface that resists loosening
  • Meets IFI 111, SAE J429, and ASTM B633 specifications

Package Details

Shipping Weight: 1 pounds
Package Size: 5.1 x 3.2 x 0.9 inches

Product Description

The grade 5 steel hex bolt has a zinc plated finish, has a serrated flange hex head with an external hex drive, and meets Industrial Fasteners Institute IFI 111 and American Society for Testing and Materials ASTM B633 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 zinc plating offers corrosion resistance and a reflective appearance. The flange hex head has six flat sides that a wrench can grip to turn from the side, enabling use when there is no space above the head for a screwdriver. The serrated flange acts like a washer to increase the fastener's bearing surface and distribute the clamping force over a larger area, providing a grip that resists loosening.

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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