[1650 BULK] Hex Head Cap Screws Grade 8 Steel Plain 5/16-18 x 3/4

Mutual ScrewSKU: 3112CH8PBB

Price:
Sale price$159.14per 1650( $0.10 each)
Pieces 1650
Measurement type Inch
Thread size 5/16-18
Diameter 5/16
Length 3/4
Material Steel
Grade Grade 8
Finish Plain
Head style Hex
Threads per inch 18
Thread style Partially Threaded
Weight 41.0 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

Hex Head Cap Screws Grade 8 steel with a plain finish for heavy-duty fastening. The 5/16-18 UNC thread and 3/4" length make these screws a versatile choice for automotive, machinery, and structural projects where high strength is essential.

Key features:

  • Grade 8 steel for superior strength and durability under high torque.
  • Plain finish — uncoated steel suitable for indoor or protected environments; not corrosion-resistant.
  • Thread size 5/16-18 UNC for a common, widely compatible pitch.
  • Length 3/4 inch to fit a range of assembly thicknesses.
  • Head type Hex head cap screw for easy wrenching with standard tools.

Applications include machinery assembly, automotive repairs, equipment installation, and other high-load fastener tasks where reliable clamping is critical. For outdoor or harsh environments, consider protective coatings or compatible hardware to extend service life. Torque and clamping performance depend on proper lubrication, thread engagement, and correct driving technique. Always refer to your project’s torque specification and fastener manufacturer guidelines.

Add these Grade 8 Hex Head Cap Screws to your toolkit for dependable, high-strength fastening. Available in 5/16-18 x 3/4" size.

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