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OSG Spiral Point Tap: 1/4"-28 UNF, H4 / 2B-3B, 3 Flute, Plug Chamfer - General Purpose Spiral-Point Taps
OSGGeneral Purpose Spiral-Point Taps

OSG Spiral Point Tap: 1/4"-28 UNF, H4 / 2B-3B, 3 Flute, Plug Chamfer

The OSG Spiral Point Tap (1/4"-28 UNF, MPN 1235608) is a general-purpose spiral-point tap with a plug chamfer, TiCN-coated high-speed steel construction, and three flutes. It is specified as H4 / 2B-3B class…

SKU 3G-OTH-215472

Brand
OSG
Item
Spiral Point Tap: 1/4"-28 UNF, H4 / 2B-3B, 3 Flute, Plug Chamfer
Category
General Purpose Spiral-Point Taps
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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
1235608
Type
H4 / 2B-3B, Plug Chamfer, TiCN Coated High Speed Steel
Flute
3

Technical Documents

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

Product Description

The OSG Spiral Point Tap (1/4"-28 UNF, MPN 1235608) is a general-purpose spiral-point tap with a plug chamfer, TiCN-coated high-speed steel construction, and three flutes. It is specified as H4 / 2B-3B class, designed for through-hole threading in a range of materials.

Frequently Asked Questions

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

This OSG spiral point tap is designed for through-hole threading in steel and cast iron. Its TiCN coating reduces friction and extends tool life. The plug chamfer and 3-flute geometry help push chips forward, making it suitable for production tapping in automotive and general machining applications.

What are the specifications of OSG tap 1235608?

The OSG tap 1235608 is a 1/4-28 UNF spiral point tap with H4 / 2B-3B tolerance, 3 flutes, plug chamfer, and TiCN coated high speed steel. It is designed for through-hole threading and provides a Class 2B or 3B fit in the workpiece.

Where to buy OSG taps in worldwide?

3G Electric supplies OSG taps like the 1235608 to customers worldwide. We handle full logistics, customs clearance, and delivery to your facility. As a global industrial sourcing partner, we provide genuine OSG tooling with technical support for your threading applications.

How to select the right spiral point tap for through holes?

For through holes, choose a spiral point tap with a plug chamfer and at least 3 flutes. Match the thread size (e.g., 1/4-28 UNF) and tolerance class (H4 / 2B-3B) to your application. TiCN coating is recommended for abrasive materials. OSG taps are a reliable choice for consistent thread quality.

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 general purpose spiral-point taps. 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
OSG Spiral Point Tap: 1/4"-28 UNF, H4 / 2B-3B, 2 Flute, Plug Chamfer, TiCN Coated High Speed Steel (MPN 1235408)
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OSG Spiral Point Tap: 1/4"-28 UNF, H4 / 2B-3B, 2 Flute, Plug Chamfer, TiCN Coated High Speed Steel (MPN 1235408)
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OSG Spiral Point Tap: 1/4"-28 UNF, H3 / 2B-3B, 2 Flute, Plug Chamfer, TiCN Coated High Speed Steel (MPN 1230408)
OSG Spiral Point Tap: 1/4"-28 UNF, H4 / 2B-3B, 3 Flute, Plug Chamfer, High Speed Steel (MPN 1235600)
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OSG Spiral Point Tap: 1/4"-28 UNF, H4 / 2B-3B, 3 Flute, Plug Chamfer, High Speed Steel (MPN 1235600)
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OSG Spiral Point Tap: 1/4"-28 UNF, H4 / 2B-3B, 2 Flute, Plug Chamfer, High Speed Steel (MPN 1235400)
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OSG
OSG Spiral Point Tap: 1/4"-28 UNF, H1 / 2B-3B, 2 Flute, Plug Chamfer, TiCN Coated High Speed Steel (MPN 1220408)
General purpose spiral-point tap for through-hole threading. Features TiCN-coated high-speed steel construction with a plug chamfer and three flutes. Thread class H2 / 2B-3B. Suitable for threading in ferrous and non-ferrous materials
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General purpose spiral-point tap for through-hole threading. Features TiCN-coated high-speed steel construction with a plug chamfer and three flutes. Thread class H2 / 2B-3B. Suitable for threading in ferrous and non-ferrous materials

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