OSG Extension Tap: 1/4"-20 UNC, H3 / 2B-3B, 4 Flute, Plug Chamfer
The OSG Extension Tap (MPN 1290001) is a 1/4"-20 UNC pulley tap with a H3 / 2B-3B tolerance, 4-flute design, plug chamfer, and black oxide high-speed steel construction. 3G Electric interprets this demand and sources…
SKU 3G-OTH-308152
Local availability & support — the Philippines
- Delivery
- 5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
- Payment
- Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
- Ships to
- Manila, Quezon City, Cebu, Davao, Batangas
Need installation or engineering help?
Ask a question
Product Description
The OSG Extension Tap (MPN 1290001) is a 1/4"-20 UNC pulley tap with a H3 / 2B-3B tolerance, 4-flute design, plug chamfer, and black oxide high-speed steel construction. 3G Electric interprets this demand and sources the genuine OSG tool, backed by our specialist expertise across 14 industrial departments — and we supply far more than is listed.
Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.
Frequently Asked Questions
What is the OSG Extension Tap 1/4"-20 UNC used for?
The OSG Extension Tap is used for threading blind or deep holes in metal parts, particularly in automotive and general manufacturing. Its extended reach allows access to recessed areas where standard taps cannot reach. The plug chamfer and 4-flute design help balance cutting load and chip evacuation.
What are the specifications of the OSG Extension Tap MPN 1290001?
This OSG Extension Tap has a 1/4"-20 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 1290001. It is classified as a pulley tap for threading applications requiring extended reach.
Where to buy the OSG Extension Tap 1/4"-20 UNC worldwide?
You can source the OSG Extension Tap MPN 1290001 worldwide through 3G Electric. As a global industrial equipment distributor since 1990, 3G Electric handles full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time.
How to select the correct OSG Extension Tap for threading?
To select the correct OSG Extension Tap, match the thread size (e.g., 1/4"-20 UNC), tolerance class (H3 / 2B-3B), and chamfer type (plug) to your workpiece material and hole depth. For blind holes, a plug chamfer is typical. Ensure the tap's flute count and coating suit the material being threaded.
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.
