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OSG 1/4-28 UNF Spiral-Flute Tap, H4 / 2B-3B, Modified Bottoming Chamfer, 2 Flute - Spiral-Flute Taps for Steel & Stainless Steel
OSGSpiral-Flute Taps for Steel & Stainless Steel

OSG 1/4-28 UNF Spiral-Flute Tap, H4 / 2B-3B, Modified Bottoming Chamfer, 2 Flute

The OSG Spiral Flute Tap (1/4"-28 UNF) is a 2-flute, modified bottoming chamfer tap with H4 / 2B-3B tolerance, designed for threading steel and stainless steel. 3G Electric interprets your demand and sources this…

SKU 3G-OTH-219036

Brand
OSG
Item
1/4-28 UNF Spiral-Flute Tap, H4 / 2B-3B, Modified Bottoming Chamfer, 2 Flute
Part Number
1650501808
Category
Spiral-Flute Taps for Steel & Stainless Steel
Available to Order
Also known as:1650501808OSG
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Technical Specifications

OSG
Manufacturer Part Number
1650501808
Type
H4 / 2B-3B, Modified Bottoming Chamfer
Flute
2

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

Product Description

The OSG Spiral Flute Tap (1/4"-28 UNF) is a 2-flute, modified bottoming chamfer tap with H4 / 2B-3B tolerance, designed for threading steel and stainless steel. 3G Electric interprets your demand and sources this genuine OSG tool (MPN 1650501808) across 14 industrial departments, with specialist depth in cutting tools and controls.

Frequently Asked Questions

What is OSG spiral flute tap 1/4-28 UNF used for?

This OSG spiral flute tap is designed for threading blind holes in steel and stainless steel. Its 2-flute design and modified bottoming chamfer efficiently evacuate chips upward, making it ideal for automotive, aerospace, and general manufacturing applications requiring precise UNF threads.

What are the specifications of OSG 1/4-28 UNF spiral flute tap?

The OSG tap has a 1/4-28 UNF thread size, H4 / 2B-3B tolerance, 2 flutes, and a modified bottoming chamfer. It is designed for threading steel and stainless steel. The manufacturer part number is 1650501808.

Where to buy OSG spiral flute taps worldwide?

3G Electric supplies OSG spiral flute taps like the 1/4-28 UNF model to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this and other OSG threading tools.

How to select the right spiral flute tap for steel?

For steel and stainless steel blind holes, choose a spiral flute tap with a modified bottoming chamfer like this OSG 1/4-28 UNF model. Ensure the tap tolerance (H4 / 2B-3B) matches your required thread class. Use appropriate cutting fluid and speed for material hardness.

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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