Holo-krome 86526 Hex Socket Cap Screw 1/4-20 Unc Alloy Steel

Product Description

The HOLO-KROME 86526 is a hex socket cap screw designed for precision fastening applications where a low-profile, high-strength connection is required. Manufactured from alloy steel and finished with a black oxide coating, this screw resists corrosion and reduces light reflection in service environments. It uses a 3/16 inch hex drive and features a 1/4-20 UNC thread with a 1/4 inch length under the head. The fastener is fully threaded along its entire shank length, making it suitable for shallow-clearance assemblies. It meets ASME B18.3 and ASTM A574 standards, which specify dimensional and mechanical requirements for alloy steel socket cap screws commonly used in industrial and mechanical installations.

This screw is suited for general mechanical assembly, tool and die work, machine guarding, and equipment fabrication where an internal-drive fastener is preferred over a hex head bolt. The 1/4-20 UNC thread is one of the most common unified coarse-thread sizes, making this screw applicable across a wide range of industrial, HVAC component assembly, and electrical enclosure fastening scenarios. The black oxide finish is appropriate for both indoor and light-duty outdoor applications where surface appearance and moderate corrosion resistance are a consideration.

Key Features

• Alloy steel construction meets ASTM A574 mechanical strength requirements for socket cap screws
• Black oxide finish provides moderate corrosion resistance and a uniform matte appearance
• Fully threaded shank allows engagement along the entire fastener length
• 3/16 inch hex drive accepts standard hex keys and hex-bit drivers
• Conforms to ASME B18.3 dimensional standards for interchangeability and consistency
• 1/4-20 UNC threading is widely compatible with standard tapped holes in machined metal assemblies

Compatibility

Designed as a standard ASME B18.3 hex socket cap screw for use in any 1/4-20 UNC tapped hole requiring an alloy steel internal-drive fastener.

Installation Notes

Installation should be performed by a qualified mechanic or technician using a properly sized 3/16 inch hex key or socket bit driver. Ensure the mating tapped hole is clean and free of debris before installation. Do not exceed the rated torque for 1/4-20 alloy steel socket cap screws as specified by applicable engineering or equipment documentation. Avoid using impact drivers that may damage the hex socket recess or over-stress the fastener.