Midwest Fasteners Steel Black Oxide Fine Thread Button Head Socket Cap Screws

Midwest Fasteners Steel Black Oxide Fine Thread Button Head Socket Cap Screws

Midwest Fasteners Button Head Socket Cap Screws are machined from steel and finished in black oxide for a low-glare, dark surface with added corrosion resistance over bare steel. This family is offered in 25 fine thread size options, from 1/4"-28 x 1/2" up to 1/2"-13 x 1", covering 1/4", 5/16", 3/8" and 1/2" diameters in lengths from 1/2" to 2", so the same button head, internal hex socket drive, fine thread pitch and black oxide finish carry across every size in the line. The low-profile button head and recessed hex socket drive make these a preferred choice over standard hex bolts where clearance and a clean, flush-mounted finish matter, such as in machinery, fixtures and equipment assembly. Because every size shares the same material, head style, drive and finish, you can pick the exact fine thread diameter and length your project needs without switching product lines.

Key Features

• Screw Size Range: 25 selectable fine thread sizes from 1/4"-28 x 1/2" up to 1/2"-13 x 1", covering 1/4", 5/16", 3/8" and 1/2" diameters with lengths from 1/2" to 2".
• Thread: Fine thread pitch for tighter engagement and improved vibration resistance versus coarse thread, consistent across every size.
• Material & Finish: Steel construction with a black oxide finish for a low-glare black appearance and added surface protection over bare steel.
• Head & Drive: Low-profile button head paired with a recessed internal hex socket drive for clean, flush-mounted installations in tight spaces.
• Product Type: Cap Screw, suited for machine assembly and equipment fastening where a socket head screw is specified.
• Color: Black, matching the black oxide surface treatment for a uniform appearance across an assembly.

Technical Specifications

• Product Type: Cap Screw
• Product Finish: Black Oxide
• Product Material: Steel
• Product Color: Black
• Country of Origin: Thailand
• Product Size: 1/4" - 1/2"
• Screw Size Options: 25 fine thread sizes from 1/4"-28 x 1/2" to 1/2"-13 x 1"

Typical Applications

• Machine and equipment assembly where a low-profile socket head is required
• Fixture and jig construction needing a recessed drive for clean surfaces
• General maintenance and repair work calling for fine thread socket cap screws
• Assemblies where appearance matters and a black oxide finish is preferred over bright zinc

Why Midwest Fasteners?

Midwest Fasteners produces this Button Head Socket Cap Screw line in consistent steel material with a black oxide finish across every size in the range, so contractors, fabricators and maintenance techs can rely on matching head style, drive type and finish no matter which fine thread size is selected. That consistency simplifies sourcing for assemblies that need multiple sizes of the same screw style, and the black oxide finish provides a uniform look along with added protection compared to plain steel.