Value Collection 30066 Hex Head Cap Screw 3/8-16 X 4 in Grade 5

Product Description

The VALUE COLLECTION 30066 is a 3/8-16 hex head cap screw designed for general mechanical fastening applications across trade and industrial settings. At 4 inches in length under head with partial threading, this fastener provides a bearing surface for clamped joint applications where a smooth shank is needed near the fastener head. Manufactured from Grade 5 steel with a zinc-plated finish, it resists corrosion in standard indoor and light outdoor environments. Conforming to ASME B18.2.1, these screws meet recognized dimensional and mechanical standards expected on professional job sites. Sold in a pack of 25.

This fastener is appropriate for mechanical assemblies, HVAC equipment mounting, electrical panel framing, plumbing fixture support structures, and general structural fastening tasks. The 3/8-16 UNC thread is one of the most common coarse-thread sizes found in North American trade equipment, making this screw a practical stock item for service vans, shops, and maintenance facilities. Partial threading makes it suitable for assemblies requiring a smooth shank to pass through clearance holes before engaging a nut or threaded receiver.

Key Features

• 3/8-16 UNC coarse thread for broad compatibility with standard nuts and threaded fittings
• 4-inch length under head with partial threading for clearance-hole joint applications
• Grade 5 steel construction for reliable tensile and yield strength in mechanical assemblies
• Zinc-plated finish provides corrosion resistance in standard service environments
• Conforms to ASME B18.2.1 dimensional and mechanical standards
• Pack of 25 screws per order unit for stocking and repetitive-use applications

Compatibility

Designed for use with standard 3/8-16 UNC hex nuts, flat washers, lock washers, and threaded inserts conforming to inch-series fastener specifications.

Installation Notes

Installation should be performed by a qualified tradesperson using the appropriate hex wrench or socket drive. Always ensure the mating nut or threaded hole is clean and free of debris before assembly. Do not exceed the rated torque range for Grade 5 fasteners of this thread size as specified by applicable mechanical codes. Zinc-plated fasteners are not intended for sustained immersion or highly corrosive environments without additional protective measures.