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OSG Spiral Flute Tap: 1/2"-20 UNF, H3 / 2B-3B, 3 Flute - Spiral-Flute Taps for Steel & Stainless Steel
OSGSpiral-Flute Taps for Steel & Stainless Steel

OSG Spiral Flute Tap: 1/2"-20 UNF, H3 / 2B-3B, 3 Flute

The OSG Spiral Flute Tap (1/2"-20 UNF, MPN 1733505) is a 3-flute tap with a modified bottoming chamfer and H3 / 2B-3B tolerance class, designed for threading steel and stainless steel. 3G Electric interprets demand…

SKU 3G-OTH-218886

Brand
OSG
Item
Spiral Flute Tap: 1/2"-20 UNF, H3 / 2B-3B, 3 Flute
Category
Spiral-Flute Taps for Steel & Stainless Steel
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Technical Specifications

OSG
Manufacturer Part Number
1733505
Type
H3 / 2B-3B, Modified Bottoming Chamfer
Flute
3
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The OSG Spiral Flute Tap (1/2"-20 UNF, MPN 1733505) is a 3-flute tap with a modified bottoming chamfer and H3 / 2B-3B tolerance class, designed for threading steel and stainless steel. 3G Electric interprets demand and sources this genuine industrial tool across 14 departments, with specialist depth in combustion, pumps, and controls as an authorised distributor.

Frequently Asked Questions

What is the OSG spiral flute tap 1/2"-20 UNF used for?

This OSG spiral flute tap is designed for threading blind holes in steel and stainless steel. Its modified bottoming chamfer and 3-flute design efficiently evacuate chips upward, making it ideal for automotive, aerospace, and general manufacturing applications requiring precise UNF threads.

What are the specifications of the OSG spiral flute tap MPN 1733505?

The OSG spiral flute tap MPN 1733505 has a 1/2"-20 UNF thread size, H3 / 2B-3B tolerance, 3 flutes, and a modified bottoming chamfer. It is classified as a spiral-flute tap for steel and stainless steel, with part number 1733505 and SKU 33XH12.

Where to buy OSG taps in worldwide?

3G Electric supplies OSG taps worldwide, including the spiral flute tap MPN 1733505. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on this and other OSG threading tools.

How to select the correct OSG tap for stainless steel?

For stainless steel, choose a spiral flute tap like the OSG 1/2"-20 UNF (MPN 1733505) with a modified bottoming chamfer. This design reduces torque and improves chip evacuation in blind holes. Ensure the tap tolerance (H3 / 2B-3B) matches your thread class requirement for optimal fit.

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 spiral-flute taps for steel & stainless steel. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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