Guhring 9039430127000 Thread Forming Tap 1/2-13 Unc

Product Description

The GUHRING 9039430127000 is a thread forming tap designed for producing 1/2-13 UNC internal threads without cutting chips. Built from cobalt-grade high-speed steel (HSS-E-CO) and finished with a TiCN coating, this tap displaces material to create strong, work-hardened threads. The modified bottoming chamfer, with 2 to 3 chamfered threads, allows threading close to the bottom of blind holes. With an overall length of 3.382 inches and a thread length of 0.9843 inches, it fits standard tap holders for this size range. Licensed HVAC, plumbing, and mechanical tradespeople will find this tap suited to precision threading in ferrous and non-ferrous materials.

This tap is rated for use in steel, stainless steel, cast iron, and non-ferrous metals, covering material application codes P, M, K, and N. It handles both blind hole and through-hole threading applications. The 5 oil grooves support lubrication flow during forming, and the 3xD flute-by-diameter ratio suits typical production and maintenance threading scenarios. The 2BX class of fit with H10/H11 thread limit provides a slightly looser tolerance appropriate for tapping where thread forming creates spring-back. This tap belongs to the Guhring Series 3943.

Key Features

• Thread forming (chipless) design produces work-hardened threads with no chip evacuation required
• Cobalt high-speed steel (HSS-E-CO) construction for increased heat and wear resistance
• TiCN coating extends tool life in abrasive and high-temperature applications
• Modified bottoming chamfer (2 to 3 threads) allows threading close to hole bottoms
• 5 oil grooves promote consistent lubrication across the forming zone
• 2BX class of fit with H10/H11 thread limit accommodates material spring-back in formed threads

Compatibility

Designed for use in steel, stainless steel, cast iron, and non-ferrous metals. Suitable for blind hole and through-hole threading applications in 1/2-13 UNC thread size. Part of Guhring Series 3943.

Installation Notes

Thread forming taps require a properly sized forming tap drill — standard cutting tap drill sizes do not apply. Use a tapping fluid or cutting oil rated for the workpiece material, and ensure the oil grooves remain clear throughout the operation. Always power down and de-energize any machine tool before changing taps or adjusting holders. Follow shop safety practices and applicable ANSI or OSHA standards when operating tapping equipment.