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OSG Screw Thread Insert STI Tap: Spiral Fute, 1/4"-20 UNC, H2 / 2B-3B, 3 Flute - Spiral-Flute STI Taps for Steel & Stainless Steel
OSGSpiral-Flute STI Taps for Steel & Stainless Steel

OSG Screw Thread Insert STI Tap: Spiral Fute, 1/4"-20 UNC, H2 / 2B-3B, 3 Flute

The OSG Screw Thread Insert STI Tap (MPN 0146008) is a spiral-flute tap for steel and stainless steel, sized 1/4"-20 UNC with a bottoming chamfer. It features 3 flutes and an H2 / 2B-3B tolerance class, designed for…

SKU 3G-OTH-244382

Brand
OSG
Item
Screw Thread Insert STI Tap: Spiral Fute, 1/4"-20 UNC, H2 / 2B-3B, 3 Flute
Category
Spiral-Flute STI Taps for Steel & Stainless Steel
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Technical Specifications

OSG
Manufacturer Part Number
0146008
Type
H2 / 2B-3B, Bottoming Chamfer
Flute
3
UNC
1/4"-20
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The OSG Screw Thread Insert STI Tap (MPN 0146008) is a spiral-flute tap for steel and stainless steel, sized 1/4"-20 UNC with a bottoming chamfer. It features 3 flutes and an H2 / 2B-3B tolerance class, designed for threading holes to accept screw thread inserts.

Frequently Asked Questions

What is an OSG spiral-flute STI tap used for?

An OSG spiral-flute STI tap is used to cut internal threads in steel and stainless steel for screw thread inserts. It creates threads that accept helical coil inserts, providing stronger threads in softer materials. The spiral flute design evacuates chips upward, making it ideal for blind-hole applications.

What are the specifications of the OSG 0146008 STI tap?

The OSG 0146008 STI tap has a thread size of 1/4"-20 UNC, a thread class of H2 / 2B-3B, 3 flutes, and a bottoming chamfer. It is designed for tapping holes that will receive screw thread inserts in steel and stainless steel. The spiral flute design aids chip evacuation in blind holes.

Where to buy OSG taps in worldwide?

You can source OSG taps worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on the OSG 0146008 spiral-flute STI tap.

How to select the correct STI tap for steel?

To select the correct STI tap for steel, match the tap thread size and pitch to the insert you will install. For steel, choose a spiral-flute design for blind holes or a spiral-point design for through holes. Ensure the tap has the correct thread class, such as H2 / 2B-3B, to achieve proper fit with the insert.

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 sti 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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