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OSG Spiral-Flute Tap 7/8"-9 UNC H6 / 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"-9 UNC H6 / 2B-3B Modified Bottoming Chamfer 4 Flute

The OSG Spiral Flute Tap (7/8"-9 UNC, MPN 1645078096) is a 4-flute tap with H6 / 2B-3B tolerance and a modified bottoming chamfer, designed for threading steel and stainless steel. 3G Electric interprets this demand…

SKU 3G-OTH-219000

Brand
OSG
Item
Spiral-Flute Tap 7/8"-9 UNC H6 / 2B-3B Modified Bottoming Chamfer 4 Flute
Category
Spiral-Flute Taps for Steel & Stainless Steel
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

OSG
Manufacturer Part Number
1645078096
Type
H6 / 2B-3B, Modified Bottoming Chamfer
Flute
4

Technical Documents

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

Product Description

The OSG Spiral Flute Tap (7/8"-9 UNC, MPN 1645078096) is a 4-flute tap with H6 / 2B-3B tolerance and a modified bottoming chamfer, designed for threading steel and stainless steel. 3G Electric interprets this demand and sources the genuine OEM part, backed by specialist expertise across 14 industrial departments.

Frequently Asked Questions

What is the OSG spiral flute tap 7/8"-9 UNC used for?

This OSG spiral flute tap is designed for threading blind holes in steel and stainless steel. Its modified bottoming chamfer and 4-flute design efficiently evacuate chips upward, making it ideal for high-production tapping applications where thread depth and surface finish are critical.

What are the specifications of the OSG 7/8"-9 UNC spiral flute tap?

The OSG spiral flute tap has a 7/8"-9 UNC thread size, H6 / 2B-3B tolerance, 4 flutes, and a modified bottoming chamfer. The manufacturer part number is 1645078096. It is designed for threading blind holes in steel and stainless steel materials.

Where to buy OSG taps in worldwide?

3G Electric supplies OSG taps worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on the OSG spiral flute tap 7/8"-9 UNC (MPN 1645078096).

How to select the correct OSG tap for steel threading?

For steel threading, choose a spiral flute tap like this OSG 7/8"-9 UNC model when tapping blind holes. The H6 / 2B-3B tolerance ensures proper fit. Verify thread size, chamfer type, and material compatibility. For best results, use appropriate cutting fluid and follow OSG's recommended speeds and feeds.

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: 7/8"-14 UNF, H6 / 2B-3B, 4 Flute, Modified Bottoming Chamfer (MPN 1645078146)
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OSG Spiral Flute Tap: 7/8"-14 UNF, H6 / 2B-3B, 4 Flute, Modified Bottoming Chamfer (MPN 1645078146)
This OSG spiral-flute tap is designed for threading blind holes in steel and stainless steel. The 3-flute design with spiral flutes evacuates chips upward, preventing clogging. The modified bottoming chamfer allows threading close to the bottom of the hole. Tolerance class H3 / 2B-3B ensures threads within a 2B (internal) to 3B (external) fit range
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This OSG spiral-flute tap is designed for threading blind holes in steel and stainless steel. The 3-flute design with spiral flutes evacuates chips upward, preventing clogging. The modified bottoming chamfer allows threading close to the bottom of the hole. Tolerance class H3 / 2B-3B ensures threads within a 2B (internal) to 3B (external) fit range
OSG Spiral Flute Tap: 1"-8 UNC, H6 / 2B-3B, 4 Flute, Modified Bottoming Chamfer (MPN 1645010086)
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OSG Spiral Flute Tap: 1"-8 UNC, H6 / 2B-3B, 4 Flute, Modified Bottoming Chamfer (MPN 1645010086)
OSG Spiral Flute Tap: 7/8"-9 UNC, H4 / 2B-3B, 4 Flute, Modified Bottoming Chamfer (MPN 1645078094)
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OSG Spiral Flute Tap: 7/8"-9 UNC, H4 / 2B-3B, 4 Flute, Modified Bottoming Chamfer (MPN 1645078094)
Spiral-flute tap with 3 flutes and modified bottoming chamfer, tolerance H3 / 2B-3B. Designed for threading blind holes in steel and stainless steel, the spiral flute evacuates chips upward to prevent clogging. Suitable for general manufacturing applications requiring threading close to the hole bottom
OSG
Spiral-flute tap with 3 flutes and modified bottoming chamfer, tolerance H3 / 2B-3B. Designed for threading blind holes in steel and stainless steel, the spiral flute evacuates chips upward to prevent clogging. Suitable for general manufacturing applications requiring threading close to the hole bottom
OSG Spiral Flute Tap: 7/8"-14 UNF, H4 / 2B-3B, 4 Flute, Modified Bottoming Chamfer (MPN 1645078144)
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OSG Spiral Flute Tap: 7/8"-14 UNF, H4 / 2B-3B, 4 Flute, Modified Bottoming Chamfer (MPN 1645078144)

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