1/4"-20 X 3/8" Machine Screws | Indented Hex Head | Slotted Drive | Steel Black Oxide (4000/Pkg.)

Engineered for reliability in metal-to-metal assemblies, our Machine Screws Slotted Indented Hex Washer Serrated Steel Black Oxide 1/4-20X3/8 deliver strong, vibration-resistant fastening for a wide range of applications. The combination of a slotted drive, indented hex washer head, and serrated design ensures a secure grip and resistant seating in metal panels, brackets, and enclosures.

Construction and finish are designed for durability and corrosion resistance in demanding environments. The base material is steel with a black oxide finish for a non-reflective surface that helps minimize glare and corrosion over time.

Key features

• Thread: 1/4-20 UNC — standard machine screw thread for compatibility with common nuts and tapped holes.
• Length: 3/8 in (9.5 mm).
• Head type: Slotted, indented hex washer — provides a secure, flush installation with added washer seating.
• Drive: Slotted — works with common screwdrivers for easy installation.
• Finish: Black oxide — corrosion resistance with a subdued finish.
• Material: Steel — strong, durable fastener for metal-to-metal applications.
• Serrated: Serrations under the head help resist loosening under vibration and load.

Specifications

• Thread: 1/4-20 UNC
• Length: 3/8 in
• Head style: Slotted indented hex washer
• Finish: Black oxide
• Material: Steel
• Application: Ideal for metal panels, brackets, and enclosures where secure vibration resistance is required

Add these machine screws to your toolkit for dependable fastening in electrical enclosures, machinery builds, and equipment assemblies. Order now to ensure you have the right size on hand for your 1/4-20 threaded projects.