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The HOLO-KROME 720000891 is a hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, industrial equipment, and structural fabrication. Sized at 10-24 UNC with a 2-3/4-inch length under head, this screw is partially threaded and driven with a 5/32-inch hex key. The alloy steel construction and black oxide finish provide solid mechanical strength and moderate corrosion resistance in typical shop and indoor service environments. It meets ASME B18.3 and ASTM A574 standards, making it suitable for engineered assemblies where fastener grade and dimensional compliance are required. Installation requires a standard 5/32-inch hex key or Allen driver.
This fastener is commonly used in machinery maintenance, equipment manufacturing, and fabrication shops where UNC-threaded socket cap screws are specified. Partial threading allows for precise clamping in through-bolt and clearance-hole configurations. Typical installers include machinists, millwrights, maintenance technicians, and mechanical contractors working with inch-series threaded hardware in ferrous and non-ferrous assemblies.
Designed as an OEM-style replacement or direct-use fastener for applications requiring 10-24 UNC partially threaded hex socket cap screws per ASME B18.3.
Installation requires a 5/32-inch hex key or socket driver. Ensure mating threads are clean and free of debris before installation. Apply thread lubricant or anti-seize as required by the assembly specification. Follow applicable torque values from published ASTM A574 or fastener manufacturer guidelines for the alloy steel grade.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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