Value Collection JY4870127 Hand Tap 1-1/4-14 Uns

Product Description

The VALUE COLLECTION JY4870127 is a bottoming-chamfer hand tap designed for cutting 1-1/4-14 UNS internal threads in through-holes and blind holes where full thread depth close to the bottom is required. Manufactured from bright-finish, uncoated high speed steel, this 4-flute straight-flute tap delivers consistent thread form and chip evacuation in a wide range of materials. The right-hand, Class 3B fit with H4 thread limit ensures the finished thread meets close-tolerance assembly requirements. Overall length is 4 inches. Machinists and maintenance technicians use this tap for manual or light machine tapping operations on industrial components.

This tap is suited for applications where a bottoming chamfer is necessary to produce usable threads as close as possible to the base of a blind hole. The 1-1/4-14 UNS designation makes it appropriate for specialty fastening and piping applications that fall outside standard UN or NPT series. The 4-flute straight-flute geometry works best in materials that produce broken chips, such as cast iron, brass, and free-machining steel. It is commonly used in maintenance, repair, and original equipment manufacturing environments that require precise, close-tolerance internal threads.

Key Features

• Bottoming chamfer allows threading to near-full depth in blind holes
• 1-1/4-14 UNS thread size for specialty applications outside standard series
• High speed steel construction provides durability in a broad range of metals
• Bright, uncoated finish for direct-use in standard tapping fluids without coating compatibility concerns
• 4-flute straight-flute design promotes chip breakage and consistent thread form
• Class 3B fit with H4 thread limit meets close-tolerance assembly specifications

Compatibility

Designed as a standard hand tap for cutting 1-1/4-14 UNS internal right-hand threads; verify thread series, pitch, and fit class against the mating fastener or fitting specification before use.

Installation Notes

Installation should be performed by a qualified machinist or maintenance technician familiar with hand tapping procedures. Always secure the workpiece and use an appropriate tapping fluid for the base material before starting. Back the tap off periodically to break chips and prevent binding, especially in deeper blind holes. Inspect the tap for wear or chipping before each use, and never force a tap that meets resistance beyond normal cutting load.