12 point bolt 5/16-18 I"

5/16-18 x 1" 12-Point Bolt — Precision Fastener for Performance Builds

When every fastener counts, the 5/16-18 x 1" 12-point bolt delivers the clamping force and torque retention demanded by serious performance and race applications. The 12-point (double-hex) head design allows for greater wrench engagement in tight spaces, making it the preferred choice for engine bays, driveline assemblies, and custom fabrication work where a standard hex head simply won't fit.

Key Features

• Thread: 5/16-18 UNC (Unified National Coarse) — widely compatible with standard US-spec hardware
• Length: 1" (25.4mm) under-head shank length
• Head Style: 12-point (double-hex) for maximum torque application in confined areas
• Weight: 13g — lightweight without compromising strength
• SKU: HAR51618112P

Applications

Ideal for use across a wide range of performance and motorsport applications including:

• Engine block and cylinder head fastening
• Driveline and differential assembly
• Suspension and chassis fabrication
• Custom bracket and brace mounting
• General high-torque fastening where space is restricted

Why 12-Point Bolts?

Unlike standard hex bolts, 12-point fasteners offer twice the number of engagement points, allowing you to work in tighter angles with a socket or wrench. This reduces the risk of rounding and makes installation and removal faster — critical when you're working against the clock in a race or build environment.

Sold individually. Suitable for use with standard 5/16" 12-point sockets.