5/16"-18 Hex Cap Screws Grade 8 Yellow Zinc

5/16"-18 Yellow Zinc Hex Cap Screws - Grade 8

Diameter - Thread Pitch: 5/16" - 18


  • 5/16"-18
  • Hexagon head designed to be driven by a wrench or socket
  • Called hex cap bolts or hex cap screws
  • Grade 8 Yellow zinc plated fasteners are heat treated and hardened for a more durable finished fastener
  • REACH and RoHS Compliant

Diameter x Thread Pitch x Length from Under Head
FT: Fully Threaded
PT: Partially Threaded


**5/16"-18 Hex Cap Screws listed as PT, usually have a threaded portion of about 7/8".
However, this can vary slightly from manufacturer to manufacturer.

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Product Specifications
Across Flats (Width)
1/2", Max 0.500 - Min 0.489
ASME
B18.2.1
Body Diameter
5/16" (Max 0.3152 - Min 0.3065)
Color
Yellow
Drive Style
External Hex
Finish
Yellow Zinc Plated
Grade
8
Head Height Basic
13/16" (Max 0.211 - Min 0.195)
Head Style
Hex
Material
Steel
Plating
Yellow Zinc
Product Type
Hex Cap Screw
Standards Met
ASME B18.2.1, REACH, RoHS
System of Measurement (Unit)
Inch
Thread Direction
Right Hand
Thread Pitch (Count)
18 Per Inch
Thread Standard
UNC
Thread Type
Coarse
Tolerance (IFI)
Actual measurements may vary slightly +/- depending on production run within IFI Tolerances
Width Across Corners
Max 0.577 - Min 0.571
Wrench Size
1/2"
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