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OSG Screw Thread Insert STI Tap: Straight Fute, 3/4"-16 UNF, H3 / 2B-3B, 4 Flute - General Purpose STI Taps
OSGGeneral Purpose STI Taps

OSG Screw Thread Insert STI Tap: Straight Fute, 3/4"-16 UNF, H3 / 2B-3B, 4 Flute

The OSG Screw Thread Insert STI Tap (MPN 12603600) is a general-purpose STI tap with a straight flute design, sized 3/4"-16 UNF. It features a bottoming chamfer, 4 flutes, and an H3 / 2B-3B tolerance class, making it…

SKU 3G-OTH-262081

Brand
OSG
Item
Screw Thread Insert STI Tap: Straight Fute, 3/4"-16 UNF, H3 / 2B-3B, 4 Flute
Category
General Purpose STI Taps
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Technical Specifications

OSG
Manufacturer Part Number
12603600
Type
H3 / 2B-3B, Bottoming Chamfer
Flute
4
UNF
3/4"-16
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The OSG Screw Thread Insert STI Tap (MPN 12603600) is a general-purpose STI tap with a straight flute design, sized 3/4"-16 UNF. It features a bottoming chamfer, 4 flutes, and an H3 / 2B-3B tolerance class, making it suitable for threading insert-ready holes in industrial applications.

Frequently Asked Questions

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

This OSG STI tap is used to cut internal threads for screw thread inserts in metalwork. It is designed for general-purpose tapping in industries like automotive and aerospace, where reliable thread repair or reinforcement is needed. The bottoming chamfer allows threading to the bottom of a blind hole.

What are the specifications of the OSG 12603600 STI Tap?

The OSG 12603600 is a straight flute STI tap with a 3/4"-16 UNF thread size, H3 / 2B-3B tolerance, and 4 flutes. It has a bottoming chamfer for blind hole threading. The H3 / 2B-3B designation indicates it produces threads that fit both 2B and 3B class limits.

Where to buy OSG STI Taps worldwide?

You can source OSG STI taps like the 12603600 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 on this and other OSG threading tools.

How to select the correct OSG STI Tap for a thread insert?

Select an OSG STI tap based on the thread insert's size and pitch, matching the tap's designation (e.g., 3/4"-16 UNF) to the insert. The H3 / 2B-3B tolerance ensures proper fit. Use a bottoming chamfer for blind holes or a plug chamfer for through holes. Always follow the insert manufacturer's recommendations.

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 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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