Need installation or engineering help?
Ask a question
Frequently Asked Questions
What is an OSG extension tap used for?
An OSG extension tap is used to cut internal threads in hard-to-reach or deep-hole applications. The extended shank allows threading in locations where a standard tap cannot reach, such as in pulley hubs or deep bores. It is designed for use with a tap wrench or machine.
What are the specifications of the OSG extension tap 1/2"-13 UNC?
This OSG extension tap has a 1/2"-13 UNC thread size, H3 / 2B-3B tolerance, 4 flutes, and a plug chamfer. It is made from black oxide high-speed steel. The manufacturer part number is 1292401. It is classified as a pulley tap for threading in confined spaces.
Where to buy OSG extension taps worldwide?
3G Electric supplies OSG extension taps worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your facility. Contact us to source this OSG 1/2"-13 UNC pulley tap (MPN 1292401) for your threading application.
How to select the correct OSG extension tap for deep-hole threading?
Select an OSG extension tap based on thread size, pitch, and material. For deep-hole threading, choose a plug chamfer and sufficient flute length for chip evacuation. This 1/2"-13 UNC tap with H3 tolerance suits general-purpose threading in steel. Always match tap to hole depth and material hardness.
Used in
Common applications for OSGOSG Products
3G Electric supplies OSG pulley taps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
