Midwest Fasteners Coarse Thread Flat Head Socket Cap Screws in Black Oxide Steel

Midwest Fasteners Coarse Thread Flat Head Socket Cap Screws in Black Oxide Steel

Midwest Fasteners Coarse Thread Flat Head Socket Cap Screws are machined from solid steel and finished in black oxide for a clean black appearance and added surface protection over bare steel. This family spans screw sizes from #6-32 x 1/2" up through 3/8"-24 x 2", covering #6, #8, #10, 1/4", 5/16", and 3/8" diameters in both coarse and fine thread pitches, with lengths from 1/2" to 2". Every size shares the same flat countersunk head that seats flush in a chamfered or countersunk hole and a hex socket drive for high-torque installation with a hex key, making this line a single matched source for machine assembly, fixture building, and equipment repair wherever a low-profile fastener is specified. Manufactured in China, each size in the range shares the same steel construction, black oxide finish, and flat countersunk head design, giving shops a consistent, matched source whether replacing a worn cap screw or building out a new assembly.

Key Features

• Size Range: Available from #6-32 x 1/2" through 3/8"-24 x 2", covering #6, #8, #10, 1/4", 5/16", and 3/8" diameters.
• Length Range: Lengths span from 1/2" to 2" across the available thread sizes.
• Material & Finish: Solid steel construction with a black oxide finish for a clean black appearance and improved surface protection over bare steel.
• Head Style: Flat countersunk head seats flush with the work surface when installed in a countersunk or chamfered hole, ideal for a smooth, low-profile finish.
• Drive: Hex socket drive accepts a hex key for high-torque installation in tight or recessed spaces where a standard screwdriver cannot reach.
• Thread: Coarse and fine thread pitches depending on size for straightforward engagement into mating tapped holes or nuts.
• Color: Black finish provides a uniform, finished look across an assembly.
• Type: Classified as a cap screw, suited to machine assembly and fixture applications rather than general wood or sheet metal fastening.

Technical Specifications

• Wire Size: #6-32 - 3/8"-24

Typical Applications

• Machine assembly and equipment construction where a flush-mounted fastener head is required
• Fixture and jig building in fabrication shops
• Replacement cap screws for maintenance and repair work on existing equipment
• General assembly tasks calling for a countersunk head with hex socket drive

Why Midwest Fasteners?

Midwest Fasteners supplies this flat head socket cap screw family in consistent steel construction with a uniform black oxide finish across the full #6-32 x 1/2" to 3/8"-24 x 2" size range, so shops and maintenance teams can source a matching set for an assembly rather than mixing finishes between suppliers. The flat countersunk head and hex socket drive combination keeps installations clean and flush, which matters on visible or close-tolerance assemblies. Manufactured in China to consistent dimensional and finish standards, this line gives shops a dependable single source across every available size. Choose Midwest Fasteners for dependable, consistently finished cap screws for your next build or repair.