Value Collection ST5/16-18X1-1/4 Hex Bolt 5/16-18 Ss

Product Description

The VALUE COLLECTION ST5/16-18X1-1/4 is a self-sealing hex bolt designed for applications where a reliable, leak-resistant fastener is required. It features a 5/16-18 UNC thread pattern and measures 1-1/4 inches in length under the head. The bolt is manufactured from 18-8 stainless steel and has been passivated to enhance corrosion resistance. A silicone O-ring integrated under the head creates a sealing surface when the fastener is driven, reducing the need for additional thread sealant or gaskets. This style of fastener is commonly installed by plumbers, HVAC technicians, and general trade mechanics in fluid-handling and pressure assemblies.

Self-sealing hex bolts of this type are used in light commercial and residential settings where a standard hex bolt would allow fluid or gas migration around the fastener shank. Common install scenarios include equipment panels, fluid reservoir covers, pump housings, and enclosures subject to moisture exposure. The 18-8 stainless steel construction makes this bolt suitable for both indoor and outdoor environments where mild corrosive conditions are present. Each package contains 5 bolts, allowing for small-quantity replacement or maintenance tasks without purchasing a full bulk lot.

Key Features

• Integrated silicone O-ring provides a sealing surface at the bolt head without additional sealant
• 18-8 stainless steel construction with passivated finish for corrosion resistance
• 5/16-18 UNC thread for broad compatibility with standard inch-pattern hardware
• 1-1/4-inch length under head suits medium-depth through-hole applications
• Sold in a pack of 5, suitable for single-unit repairs or small maintenance jobs

Compatibility

Designed as a direct-fit self-sealing hex bolt for any application requiring a 5/16-18 UNC thread and a 1-1/4-inch grip length in 18-8 stainless steel.

Installation Notes

Installation is performed with a standard hex wrench or socket sized for a 5/16-18 hex head. Ensure the mating surface is clean and flat so the O-ring seats evenly and creates a full seal. Do not overtighten, as excessive torque can damage or extrude the silicone O-ring and reduce sealing effectiveness. Shut down and depressurize any fluid or gas system before removing or replacing fasteners in pressurized assemblies.