• 7/8"-9x3-1/4" Grade 5 HHCS Yellow Zinc Cr6

7/8"-9x3-1/4" Grade 5 Hex Head Cap Screw Yellow Zinc Cr6 Plating

Part Number: 7/89X31/4G5-YZ
BreakpointPriceDiscount
15 - 49$3.916517.5%
50 - 59$3.133234%
60 - 99$3.481326.67%
100+$2.848340%
200+$2.611045%
Order in Blocks of: 15
$4.75
QTY:
  

PRODUCT DETAILS

7/8"-9x3-1/4" Partial Thread Grade 5 Hex Head Cap Screw with Yellow Zinc Cr6 Plating
SPECS
  • Size: 7/8"-9
  • Thread: UNC
  • Length: 3-1/4"
  • Grade: 5
  • Plating: Yellow Zinc Cr6

Grade 5 Hex Head Cap Screw with Yellow Zinc Cr6 Plating – Strength Meets Style for Fractional-Sized Applications

The Grade 5 Hex Head Cap Screw with Yellow Zinc Cr6 Plating is the perfect fastener for applications requiring enhanced strength, a visually distinctive finish, and reliable corrosion resistance. Manufactured to meet SAE standards and available in Fractional sizes, this cap screw is a workhorse in automotive, machinery, and industrial construction projects where consistent performance matters.

Made from medium carbon steel that's heat-treated, this Grade 5 fastener provides a minimum tensile strength of 120,000 PSI, making it tougher than standard Grade 2 fasteners. Its hex head design allows for easy installation with standard wrenches or sockets, delivering secure clamping force and torque transfer in high-vibration assemblies.

The Yellow Zinc Cr6 plating offers both function and form—providing moderate corrosion resistance and a bright, golden appearance that's easy to identify. This trivalent chromium finish is ideal for indoor or semi-exposed applications and helps reduce galling while offering a lubricious surface for smoother installation.


Specifications:

  • Material: Medium carbon steel, heat-treated

  • Grade: SAE Grade 5

  • Finish: Yellow Zinc Cr6 (hexavalent chromium)

  • Head Style: Hex

  • Threading: Partially or fully threaded (varies by length)

  • Sizes: Fractional sizes from 1/4" to 1-1/2" diameter

  • Standards: Meets ASME B18.2.1, SAE J429


Applications:

  • Automotive engine, frame, and suspension components

  • Heavy machinery and equipment assembly

  • Agricultural implements and trailers

  • Structural steel connections

  • Maintenance and repair operations (MRO)

With high tensile strength, a corrosion-resistant finish, and classic hex head convenience, the Grade 5 Yellow Zinc Cr6 Plated Cap Screw is an essential component in any performance-focused fastening solution.

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