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OSG Screw Thread Insert STI Tap: Spiral Fute, 3/8"-16 UNC, H4 / 2B-3B, 3 Flute - Spiral-Flute STI Taps
OSGSpiral-Flute STI Taps

OSG Screw Thread Insert STI Tap: Spiral Fute, 3/8"-16 UNC, H4 / 2B-3B, 3 Flute

The OSG Screw Thread Insert STI Tap is a spiral-flute tap designed for threading holes to accept screw thread inserts. This specific model (MPN 8015700) features a 3/8"-16 UNC thread size, H4 / 2B-3B tolerance class…

SKU 3G-OTH-273369

Brand
OSG
Item
Screw Thread Insert STI Tap: Spiral Fute, 3/8"-16 UNC, H4 / 2B-3B, 3 Flute
Category
Spiral-Flute STI Taps
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Technical Specifications

OSG
Manufacturer Part Number
8015700
Type
H4 / 2B-3B, Bottoming Chamfer
Flute
3
UNC
3/8"-16
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The OSG Screw Thread Insert STI Tap is a spiral-flute tap designed for threading holes to accept screw thread inserts. This specific model (MPN 8015700) features a 3/8"-16 UNC thread size, H4 / 2B-3B tolerance class, a bottoming chamfer, and three flutes.

Frequently Asked Questions

What is the OSG Screw Thread Insert STI Tap used for?

This OSG spiral-flute STI tap is used to cut internal threads for screw thread inserts in metalwork. It is designed for bottoming chamfer applications, allowing threading close to the bottom of a blind hole. Common in automotive, aerospace, and general manufacturing where strong, replaceable threads are needed.

What are the specifications of the OSG 8015700 STI Tap?

The OSG 8015700 is a spiral-flute STI tap with UNC thread size 3/8"-16, H4 / 2B-3B tolerance, 3 flutes, and a bottoming chamfer. It is designed for cutting threads for screw thread inserts. The H4 / 2B-3B specification ensures precise fit for insert installation.

Where to buy OSG STI Taps worldwide?

You can source OSG STI Taps, including model 8015700, through 3G Electric. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time on this item.

How to select the correct STI tap for screw thread inserts?

Select an STI tap based on the insert's thread size and pitch, such as 3/8"-16 UNC. Ensure the tap has the correct tolerance class (e.g., H4 / 2B-3B) and chamfer type—bottoming for blind holes, plug or taper for through holes. OSG taps are a reliable choice for precision threading.

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. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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