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OSG Spiral Flute Tap: 1 1/2"-8 8UN, H9 / 2B-3B, 4 Flute - Spiral-Flute Taps for Steel & Stainless Steel
OSGSpiral-Flute Taps for Steel & Stainless Steel

OSG Spiral Flute Tap: 1 1/2"-8 8UN, H9 / 2B-3B, 4 Flute

The OSG Spiral Flute Tap (1 1/2"-8 8UN) is a spiral-flute tap for steel and stainless steel, featuring an H9 / 2B-3B tolerance, 4 flutes, and a modified bottoming chamfer (MPN 1650508108).

SKU 3G-OTH-218815

Brand
OSG
Item
Spiral Flute Tap: 1 1/2"-8 8UN, H9 / 2B-3B, 4 Flute
Part Number
1650508108
Category
Spiral-Flute Taps for Steel & Stainless Steel
Available to Order
Also known as:1650508108OSG
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Local availability & support — Singapore

Local office
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Phone
+65 8878 8355
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Technical Specifications

OSG
Manufacturer Part Number
1650508108
Type
H9 / 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 (1 1/2"-8 8UN) is a spiral-flute tap for steel and stainless steel, featuring an H9 / 2B-3B tolerance, 4 flutes, and a modified bottoming chamfer (MPN 1650508108).

Frequently Asked Questions

What is the OSG spiral flute tap 1 1/2"-8 8UN 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-accuracy tapping in automotive, aerospace, and general manufacturing applications.

What are the specifications of the OSG spiral flute tap MPN 1650508108?

The OSG spiral flute tap has a thread size of 1 1/2"-8 8UN, with a tolerance class of H9 / 2B-3B. It features 4 flutes and a modified bottoming chamfer. The manufacturer part number is 1650508108, and it is suited for threading steel and stainless steel.

Where to buy OSG taps in worldwide?

3G Electric supplies OSG taps like the 1 1/2"-8 8UN spiral flute tap to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time on this and other OSG threading tools.

How to select the right spiral flute tap for steel?

For threading blind holes in steel, choose a spiral flute tap with a modified bottoming chamfer, like this OSG H9 / 2B-3B model. Ensure the thread size (e.g., 1 1/2"-8 8UN) matches your application. Use proper cutting fluid and machine speed per OSG recommendations for best thread quality.

Used in

Common applications for OSG
Aerospace — OSG STI taps for installing helical wire thread inserts in aluminum components
Automotive — OSG spiral-point taps for through-hole threading in engine blocks and transmission cases
General machining — OSG spiral-flute taps for blind-hole threading in steel and stainless steel parts
Heavy equipment repair — OSG thread-forming taps for creating threads in ductile iron and steel castings
Precision manufacturing — OSG solid carbide chucking reamers for finishing holes in hydraulic manifolds
Die and mold — OSG coolant-through solid carbide drills for deep-hole drilling in tool steels
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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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