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OSG Spiral Flute Tap: M18x2.5 Metric, D7 / 4H-6H, 4 Flute - Spiral-Flute Taps for Steel & Stainless Steel
OSGSpiral-Flute Taps for Steel & Stainless Steel

OSG Spiral Flute Tap: M18x2.5 Metric, D7 / 4H-6H, 4 Flute

The OSG Spiral Flute Tap is a metric M18x2.5 spiral-flute tap for steel and stainless steel, featuring a D7 / 4H-6H tolerance class, 4 flutes, and a modified bottoming chamfer (MPN 1645518257).

SKU 3G-OTH-218685

Brand
OSG
Item
Spiral Flute Tap: M18x2.5 Metric, D7 / 4H-6H, 4 Flute
Category
Spiral-Flute Taps for Steel & Stainless Steel
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Technical Specifications

OSG
Manufacturer Part Number
1645518257
Type
D7 / 4H-6H, Modified Bottoming Chamfer
Flute
4
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The OSG Spiral Flute Tap is a metric M18x2.5 spiral-flute tap for steel and stainless steel, featuring a D7 / 4H-6H tolerance class, 4 flutes, and a modified bottoming chamfer (MPN 1645518257).

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the OSG spiral flute tap M18x2.5 used for?

This OSG spiral flute tap is designed for threading blind holes in steel and stainless steel. The spiral flute design evacuates chips upward, preventing clogging in deep or blind holes. It is commonly used in automotive, aerospace, and general manufacturing for producing precise internal threads in tough materials.

What are the specifications of the OSG spiral flute tap M18x2.5?

This OSG tap has a metric thread size of M18x2.5 with a D7 / 4H-6H tolerance class. It features 4 flutes and a modified bottoming chamfer for threading close to the bottom of blind holes. The manufacturer part number is 1645518257. It is designed for steel and stainless steel applications.

Where to buy the OSG spiral flute tap M18x2.5 worldwide?

You can source the OSG spiral flute tap M18x2.5 (MPN 1645518257) through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply genuine OSG tooling for your manufacturing needs.

How to select the correct OSG spiral flute tap for steel?

For threading steel and stainless steel, select a spiral flute tap with a modified bottoming chamfer like this OSG M18x2.5 model. Ensure the thread tolerance (D7 / 4H-6H) matches your required fit. Use appropriate cutting fluid and machine speed per OSG recommendations. For blind holes, spiral flute taps are ideal as they pull chips out of the hole.

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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