5/16"-18 X 3/4" Machine Screws | Indented Hex Washer Head | Steel Black Oxide (1250/Pkg.)

Secure every project with the Machine Screws Unslotted Indented Hex Washer Steel Black Oxide 5/16-18 x 3/4. Built for dependable performance in metal-to-metal fastenings, these screws combine a low-profile indented hex washer head with a durable steel body and a corrosion-resistant black oxide finish.

Key Features

• Size and thread: 5/16-18 UNC, standard coarse thread for broad compatibility.
• Length: 3/4 inch overall length, suited for through-holes and snug mounting.
• Head and drive: Indented hex washer head (unslotted) designed for a secure, flush installation with a hex driver.
• Material and finish: Steel core with black oxide finish for durability and a sleek look that resists minor corrosion.
• Application: Ideal for machinery, electronics enclosures, and general hardware where a clean, low-profile fastener is needed.

Specifications

• Thread type: UNC 5/16-18
• Diameter: 5/16 inch
• Length: 3/4 inch
• Head type: Indented hex washer
• Drive style: Indented hex (unslotted) for hex-key installation

Choose these machine screws for secure, professional fastenings with a clean, industrial look. Add to cart to complete your hardware kit today.