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OSG Spiral Flute Tap: 1/2"-13 UNC, H7 / 2B-3B, 3 Flute - General Purpose Spiral-Flute Taps
OSGGeneral Purpose Spiral-Flute Taps

OSG Spiral Flute Tap: 1/2"-13 UNC, H7 / 2B-3B, 3 Flute

SKU 3G-OTH-230632

Brand
OSG
Item
Spiral Flute Tap: 1/2"-13 UNC, H7 / 2B-3B, 3 Flute
Category
General Purpose Spiral-Flute Taps
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Technical Specifications

OSG
Manufacturer Part Number
2942501
Type
H7 / 2B-3B, Modified Bottoming Chamfer
Flute
3
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Frequently Asked Questions

What is the OSG spiral flute tap 1/2"-13 UNC used for?

This OSG spiral flute tap is designed for threading blind holes in ferrous and non-ferrous materials. Its modified bottoming chamfer and 3-flute design efficiently evacuate chips upward, making it ideal for general-purpose tapping in machining, automotive, and industrial maintenance applications.

What are the specifications of the OSG tap MPN 2942501?

The OSG spiral flute tap MPN 2942501 has a 1/2"-13 UNC thread, H7 / 2B-3B tolerance, 3 flutes, and a modified bottoming chamfer. It is a general-purpose tap suitable for producing threads to Class 2B or 3B fit in blind holes.

Where to buy OSG taps in worldwide?

3G Electric supplies OSG taps like the 1/2"-13 UNC spiral flute tap (MPN 2942501) to customers worldwide. We handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this and other OSG threading tools.

How to select the right OSG spiral flute tap for blind holes?

For blind holes, choose a spiral flute tap with a modified bottoming chamfer, like this OSG 1/2"-13 UNC tap. The spiral flutes pull chips upward, preventing packing at the hole bottom. Match the tap tolerance (H7 / 2B-3B) to your required thread class and material hardness.

Used in

Common applications for OSG
Automotive engine block production — OSG micro drill bits for oil gallery and coolant passage drilling in cast iron
Medical device manufacturing — OSG micro drill bits for drilling bone screw pilot holes in stainless steel implants
Aerospace component machining — OSG micro drill bits for fastener holes in titanium alloy structural parts
Mold and die making — OSG micro drill bits for cooling channel drilling in hardened tool steel (HRC 45-50)
Electronics enclosure fabrication — OSG micro drill bits for precision holes in aluminum alloy housings (with appropriate coating selection)
General engineering job shops — OSG micro drill bits for small-diameter hole drilling in mild steel and alloy steel parts

OSG Products

3G Electric supplies OSG general purpose spiral-flute taps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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