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OSG Spiral-Flute Tap 7/8"-20 UNEF H5 / 2B-3B Modified Bottoming Chamfer 4 Flute - Spiral-Flute Taps for Steel & Stainless Steel
OSGSpiral-Flute Taps for Steel & Stainless Steel

OSG Spiral-Flute Tap 7/8"-20 UNEF H5 / 2B-3B Modified Bottoming Chamfer 4 Flute

The OSG Spiral Flute Tap (7/8"-20 UNEF) is a spiral-flute tap for steel and stainless steel, featuring an H5 / 2B-3B tolerance with a modified bottoming chamfer and 4 flutes (MPN 1650506708). 3G Electric interprets…

SKU 3G-OTH-218953

Brand
OSG
Item
Spiral-Flute Tap 7/8"-20 UNEF H5 / 2B-3B Modified Bottoming Chamfer 4 Flute
Category
Spiral-Flute Taps for Steel & Stainless Steel
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Technical Specifications

OSG
Manufacturer Part Number
1650506708
Type
H5 / 2B-3B, Modified Bottoming Chamfer
Flute
4

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

Product Description

The OSG Spiral Flute Tap (7/8"-20 UNEF) is a spiral-flute tap for steel and stainless steel, featuring an H5 / 2B-3B tolerance with a modified bottoming chamfer and 4 flutes (MPN 1650506708). 3G Electric interprets this demand and sources the genuine OSG product, supporting your operation across 14 industrial departments with specialist depth in cutting tools.

Frequently Asked Questions

What is the OSG spiral flute tap 7/8"-20 UNEF used for?

This OSG spiral flute tap is designed for threading steel and stainless steel. The 7/8"-20 UNEF size with a modified bottoming chamfer and 4-flute design efficiently evacuates chips upward, making it ideal for blind-hole threading in industrial manufacturing and maintenance applications.

What are the specifications of the OSG spiral flute tap 7/8"-20 UNEF?

The OSG spiral flute tap has a thread size of 7/8"-20 UNEF, a H5 tolerance for class 2B-3B fit, 4 flutes, and a modified bottoming chamfer. The manufacturer part number is 1650506708. It is designed for threading steel and stainless steel materials.

Where to buy OSG spiral flute taps worldwide?

You can source OSG spiral flute taps worldwide through 3G Electric, a global industrial equipment 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 right OSG spiral flute tap for steel?

Select an OSG spiral flute tap based on thread size, tolerance, and material. For steel and stainless steel, use a tap with a modified bottoming chamfer and 4 flutes, like the 7/8"-20 UNEF H5 model. Ensure the tap matches your hole type (blind or through) and desired thread class.

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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Cross-referenced by specification & description
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OSG Spiral Flute Tap: 1 3/8"-12 UNF, H8 / 2B-3B, 4 Flute, Modified Bottoming Chamfer (MPN 1650507908)
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