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OSG Spiral Flute Tap: 1/4"-20 UNC, H5 / 2B-3B, 2 Flute - Spiral-Flute Taps for Steel & Stainless Steel
OSGSpiral-Flute Taps for Steel & Stainless Steel

OSG Spiral Flute Tap: 1/4"-20 UNC, H5 / 2B-3B, 2 Flute

The OSG Spiral Flute Tap (1/4"-20 UNC) is a spiral-flute tap for steel and stainless steel, featuring an H5 / 2B-3B tolerance with a modified bottoming chamfer and 2 flutes (MPN 1645014205). 3G Electric interprets…

SKU 3G-OTH-217809

Brand
OSG
Item
Spiral Flute Tap: 1/4"-20 UNC, H5 / 2B-3B, 2 Flute
Category
Spiral-Flute Taps for Steel & Stainless Steel
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Technical Specifications

OSG
Manufacturer Part Number
1645014205
Type
H5 / 2B-3B, Modified Bottoming Chamfer
Flute
2

Technical Documents

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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The OSG Spiral Flute Tap (1/4"-20 UNC) is a spiral-flute tap for steel and stainless steel, featuring an H5 / 2B-3B tolerance with a modified bottoming chamfer and 2 flutes (MPN 1645014205). 3G Electric interprets this demand and sources the genuine OSG product, backed by specialist expertise across 14 industrial departments.

Frequently Asked Questions

What is the OSG spiral flute tap used for?

The OSG spiral flute tap is designed for threading blind holes in steel and stainless steel. Its spiral flute design evacuates chips upward, preventing clogging and breakage, making it ideal for production tapping in automotive, aerospace, and general manufacturing applications.

What are the specifications of the OSG 1/4-20 UNC spiral flute tap?

This OSG tap has a 1/4-20 UNC thread size, H5 / 2B-3B tolerance, 2 flutes, and a modified bottoming chamfer. It is designed for threading blind holes in steel and stainless steel. The manufacturer part number is 1645014205.

Where to buy OSG taps in worldwide?

3G Electric supplies and delivers OSG taps worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to ensure your order reaches any international destination. Contact us for availability and lead time on this OSG spiral flute tap.

How to select the right spiral flute tap for steel?

For steel, choose a spiral flute tap with a modified bottoming chamfer for blind holes. Ensure the thread size matches your application, like 1/4-20 UNC. The H5 tolerance class provides a precise fit for 2B-3B thread classes. OSG taps are a reliable choice for consistent performance.

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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Compatible alternatives & equivalents

Cross-referenced by specification & description
OSG Spiral Flute Tap: 1/2"-20 UNF, H5 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1645012205)
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OSG Spiral Flute Tap: 1/2"-13 UNC, H5 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1645012135)
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OSG Spiral Flute Tap: 7/16"-20 UNF, H5 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1645076205)
OSG Spiral Flute Tap: 3/4"-10 UNC, H5 / 2B-3B, 4 Flute, Modified Bottoming Chamfer (MPN 1645034105)
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OSG Spiral Flute Tap: 3/4"-10 UNC, H5 / 2B-3B, 4 Flute, Modified Bottoming Chamfer (MPN 1645034105)
OSG Spiral Flute Tap: 1/4"-20 UNC, H3 / 2B-3B, 2 Flute, Modified Bottoming Chamfer (MPN 1645014203)
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OSG Spiral Flute Tap: 1/4"-20 UNC, H3 / 2B-3B, 2 Flute, Modified Bottoming Chamfer (MPN 1645014203)

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