Value Collection 451132BR Hex Head Cap Screw 5/8-18

Product Description

The VALUE COLLECTION 451132BR is a Grade 8 steel hex head cap screw with a 5/8-18 UNF thread and a 7.5-inch length under the head. It is partially threaded and left in a bright, uncoated finish. Manufactured to ASME B18.2.1 standards, this fastener is suited for high-strength bolting applications where a fine thread pitch is required for precise torque control and vibration resistance. The Grade 8 designation indicates a minimum tensile strength appropriate for demanding structural and mechanical assemblies. Installers work this screw with a 5/16-inch hex key or a standard hex socket.

This cap screw is used in industrial, mechanical, and structural applications where a fine-thread, high-strength fastener is specified. Typical scenarios include machinery assembly, equipment mounting, and structural connections that call for an inch-series UNF thread pattern. Its partial threading allows the unthreaded shank to serve as a locating or load-bearing surface, which is common in flanged joints, brackets, and heavy-equipment frames. Both maintenance technicians and fabricators regularly specify Grade 8 hardware for applications involving dynamic loads or controlled preload requirements.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 5/8-18 UNF fine thread for precise torque control and vibration resistance
• 7.5-inch length under head with partial threading, leaving a clean load-bearing shank
• Bright, uncoated finish; no coating interference with dimensional tolerances
• Manufactured to ASME B18.2.1 dimensional standards
• Driven with a 5/16-inch hex key or matching hex socket

Compatibility

Designed as a standard inch-series UNF hex head cap screw for use in any application calling for a 5/8-18 Grade 8 fastener conforming to ASME B18.2.1.

Installation Notes

Installation should be performed by a qualified mechanic or tradesperson familiar with torque specifications for Grade 8 fasteners in the relevant application. Always consult the equipment manufacturer or applicable structural specification for required clamp load and torque values before tightening. Use a calibrated torque wrench and verify that mating threads and bearing surfaces are clean and free of debris. Do not exceed the rated proof load of the fastener or mix Grade 8 hardware with lower-grade nuts or mating components.