The Hillman 90401 machine screw is a reliable, zinc‑plated steel fastener designed for secure metal‑to‑metal fastening across industrial, mechanical, electrical, and general‑purpose applications. With a 1/4‑20 coarse machine thread and a 1‑1/2 inch length, it provides solid engagement when used with tapped holes or matching 1/4‑20 nuts.
This screw uses a round head that provides smooth seating and even load distribution against the work surface. It features a combination slotted/Phillips drive, allowing installation with either standard flat‑blade or Phillips screwdrivers, improving versatility across different work environments.
The zinc‑plated finish provides moderate corrosion resistance and is suitable for both indoor and outdoor use. Supplying 100 screws per box, this SKU is ideal for maintenance teams, contractors, fabrication shops, and hardware inventory stocking.
Key Features
1/4‑20 coarse thread for strong, secure fastening
1‑1/2 inch length suitable for medium‑reach assemblies
Round head for smooth seating and material protection
Combination slotted/Phillips drive for flexible tool compatibility
Zinc‑plated steel construction for durability and corrosion resistance
100‑count box ideal for bulk storage, shops, and jobsite use
Specifications
Specification
Detail
Model Number
90401
Thread Size
1/4‑20 UNC
Length
1‑1/2 inches
Head Type
Round
Drive Type
Combination (Slotted + Phillips)
Material
Steel
Finish
Zinc‑plated
Thread Style
Coarse
Package Quantity
100 screws
Applications
General mechanical assembly
Mounting hardware components and brackets
Electrical and HVAC installations
Fabrication and repair work
Suitable for indoor or outdoor environments requiring moderate corrosion protection
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