Tweco 1140-1248 Mig Contact Tip 0.046 in 25 Pack

Product Description

The TWECO 1140-1248 is a threaded MIG contact tip designed for 0.046 inch (3/64 inch) wire diameter applications up to 400 amps. Machined from 122 DHP copper alloy tubing, it delivers consistent electrical conductivity and a smooth inside diameter surface held to a tolerance of plus or minus 0.003 inches. The nominal inside diameter is 0.059 inches with an outside diameter of 0.283 inches and a body length of 1.47 inches. The 1/4 inch-28 UNF-2A thread ensures secure, positive contact with the gas diffuser on a MIG gun. Each tip is marked with the part number and wire diameter for fast field identification. Sold in packs of 25.

This contact tip is suited for standard MIG welding operations in both shop and field environments. It is rated for continuous use up to 400 amps, making it appropriate for light industrial and production welding applications. The threaded design is compatible with MIG guns that accept the standard 1/4 inch-28 UNF-2A tip thread. Welders and maintenance technicians working with flux-core or solid wire processes in the 0.046 inch diameter range will find this tip a direct fit for high-cycle production work.

Key Features

• Machined from 122 DHP copper alloy tubing for consistent electrical properties and smooth bore surface
• Inside diameter tolerance held to plus or minus 0.003 inches for reliable wire feed
• 1/4 inch-28 UNF-2A threaded style ensures proper seating against the gas diffuser
• Each tip marked with part number and wire diameter for quick identification
• Rated up to 400 amps for standard MIG welding applications
• Sold as a pack of 25 for high-volume or production use

Compatibility

Designed for MIG guns that accept a 1/4 inch-28 UNF-2A threaded contact tip and use 0.046 inch wire diameter. Intended for use in standard welding applications up to 400 amps.

Installation Notes

Installation is performed by a qualified welder or MIG gun technician. Always power down and de-energize the welding system before replacing a contact tip. Thread the tip by hand into the gas diffuser until snug, then tighten with the appropriate wrench — avoid overtightening, which can crack the tip or distort the bore. Inspect the gas diffuser threads before installation to ensure a clean, undamaged seating surface.

Technical Specifications

• Wire Diameter: 0.046 inches
• Bore (Nominal ID): 0.059 inches
• Outside Diameter: 0.283 inches
• Tip Length: 1.47 inches
• Thread Size: 1/4 inch-28 UNF-2A
• Current Rating: 400 amps
• Inside Diameter Tolerance: plus or minus 0.003 inches
• Material: 122 DHP Copper Alloy
• Quantity per Pack: 25
• Weight: 0.03 pounds

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1140-1248