[50 PKG] Hex Head Cap Screws Grade 8 Steel Zinc Yellow Bake (USA Made) 5/16-18 x 3 1/2

Mutual ScrewSKU: 3156CH8DBB

Price:
Sale price$46.15 Regular price$51.27per 50( $0.92 each)
Pieces 50
Measurement type Inch
Thread size 5/16-18
Diameter 5/16
Length 3-1/2
Material Steel
Grade Grade 8
Finish Yellow Bake
Head style Hex
Threads per inch 18
Thread style Partially Threaded
Weight 4.11 lb

WARNING: This product can expose you to chemicals including lead and lead compounds, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to https://www.P65Warnings.ca.gov.

Description

Premium Hex Head Cap Screws Grade 8 steel with a zinc yellow bake finish, proudly USA made. These hex head cap screws deliver exceptional strength, reliability, and corrosion resistance for demanding assemblies.

  • Size: 5/16-18 x 3 1/2 in (UNC threads)
  • Material: Grade 8 steel
  • Finish: Zinc yellow bake plating
  • Head: Hex head cap screw
  • Origin: USA made

Built to withstand high torque and heavy loads, these screws are ideal for automotive, machinery, and industrial equipment applications where dependable fasteners are essential. The Grade 8 steel core provides outstanding strength, while the yellow zinc finish offers corrosion resistance in a range of environments.

Why choose these Hex Head Cap Screws?

  • High-strength Grade 8 alloy steel for demanding assemblies
  • Durable zinc yellow bake finish for corrosion resistance
  • Precise 5/16-18 UNC thread for secure fastening
  • USA-made quality you can trust

Pair with matching nuts and compatible threaded holes for a secure, long-lasting connection. Ideal for builders, mechanics, and DIY enthusiasts who demand performance from every fastener.

Can We Help?

If you’re not sure that this product is right for you, give us a call!
800-222-0324

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