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OSG 1/4"-28 UNF Spiral-Point Tap - Spiral-Point Taps for Steel & Stainless Steel
OSGSpiral-Point Taps for Steel & Stainless Steel

OSG 1/4"-28 UNF Spiral-Point Tap

The OSG Spiral Point Tap (1/4"-28 UNF) is a spiral-point tap for steel and stainless steel, featuring a H4 / 2B-3B tolerance, plug chamfer, 3 flutes, and V coated powdered metal construction (MPN 1651501808).

SKU 3G-OTH-224029

Brand
OSG
Item
1/4"-28 UNF Spiral-Point Tap
Part Number
1651501808
Category
Spiral-Point Taps for Steel & Stainless Steel
Available to Order
Also known as:1651501808OSG
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Technical Specifications

OSG
Manufacturer Part Number
1651501808
Type
H4 / 2B-3B, Plug Chamfer, V Coated Powdered Metal
Flute
3

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

Product Description

The OSG Spiral Point Tap (1/4"-28 UNF) is a spiral-point tap for steel and stainless steel, featuring a H4 / 2B-3B tolerance, plug chamfer, 3 flutes, and V coated powdered metal construction (MPN 1651501808).

Frequently Asked Questions

What is an OSG spiral point tap used for?

An OSG spiral point tap is designed for through-hole threading in steel and stainless steel. Its spiral point pushes chips ahead, preventing clogging. The V coated powdered metal construction provides wear resistance for production threading in automotive, aerospace, and general manufacturing applications.

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

This OSG tap has a 1/4"-28 UNF thread, H4 / 2B-3B tolerance, 3 flutes, and a plug chamfer. It is made of V coated powdered metal. The manufacturer part number is 1651501808. It is intended for threading steel and stainless steel in through-hole applications.

Where to buy OSG taps in worldwide?

3G Electric supplies OSG taps worldwide, handling full logistics and customs clearance. As a global industrial sourcing partner, we provide genuine OSG cutting tools like this spiral point tap. Contact us for pricing and lead time on this and other OSG part numbers.

How to select the correct OSG tap for stainless steel?

For stainless steel, choose a tap with a V coating and powdered metal substrate like this OSG spiral point tap. Use a plug chamfer for through holes. Ensure the thread class (H4 / 2B-3B) matches your required fit. Proper cutting fluid and speed are essential for thread quality and tool life.

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-point 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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