Value Collection 36990 Unequal Double Threaded Stud 3 in

Product Description

The VALUE COLLECTION 36990 is an unequal double threaded stud machined from Grade 8 alloy steel with a yellow zinc dichromate finish. At 3 inches overall length, it features two different thread pitches on opposing ends — a 1/2-13 UNC short end and a 1/2-20 UNF long end — separated by a 1/4-inch unthreaded shank. The yellow zinc dichromate coating provides corrosion resistance in demanding environments. Machinists, millwrights, and maintenance mechanics install these studs where two different thread standards must be bridged in a single fastener assembly. Sold in a package of 10.

This stud is suited for industrial, mechanical, and equipment assembly applications where unequal thread engagement is required on opposing sides of a joint. The short end provides 3/4 inch of thread engagement at 1/2-13, while the long end provides 2 inches of thread engagement at 1/2-20. The unthreaded shank section allows for controlled seating depth. Typical applications include machine frames, fixtures, and equipment mounting where mixed thread specifications are specified by design.

Key Features

• Unequal thread configuration: 1/2-13 UNC short end and 1/2-20 UNF long end
• Grade 8 alloy steel construction for high-strength fastener applications
• Yellow zinc dichromate finish for corrosion resistance
• 3-inch overall length with 1/4-inch unthreaded shank
• Short thread length of 3/4 inch; long thread length of 2 inches
• Sold in a package of 10 pieces

Compatibility

Designed as an OEM-style replacement or direct-fit fastener for mechanical assemblies requiring a 1/2-13 to 1/2-20 unequal double threaded stud with a 3-inch overall length.

Installation Notes

Installation is performed by machinists, millwrights, or maintenance mechanics using standard hand or power tools rated for Grade 8 fasteners. Verify thread engagement depth and confirm mating thread specifications on both receiving components before installation. Do not cross-thread or over-torque — consult the equipment manufacturer's fastener torque specifications for 1/2-inch Grade 8 hardware. Always de-energize and lock out equipment before replacing structural fasteners in operating machinery.