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OSG Screw Thread Insert STI Tap: Spiral Fute, 7/16"-14 UNC, H4 / 2B-3B, 4 Flute - Spiral-Flute STI Taps
OSGSpiral-Flute STI Taps

OSG Screw Thread Insert STI Tap: Spiral Fute, 7/16"-14 UNC, H4 / 2B-3B, 4 Flute

The OSG Screw Thread Insert STI Tap (SKU 33ZF14, MPN 10800500) is a spiral-flute tap for 7/16"-14 UNC threads, with an H4 / 2B-3B tolerance and a bottoming chamfer. It features 4 flutes and is designed for threading…

SKU 3G-OTH-273379

Brand
OSG
Item
Screw Thread Insert STI Tap: Spiral Fute, 7/16"-14 UNC, H4 / 2B-3B, 4 Flute
Category
Spiral-Flute STI Taps
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Technical Specifications

OSG
Manufacturer Part Number
10800500
Type
H4 / 2B-3B, Bottoming Chamfer
Flute
4
UNC
7/16"-14
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The OSG Screw Thread Insert STI Tap (SKU 33ZF14, MPN 10800500) is a spiral-flute tap for 7/16"-14 UNC threads, with an H4 / 2B-3B tolerance and a bottoming chamfer. It features 4 flutes and is designed for threading holes that will accept screw thread inserts.

Frequently Asked Questions

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

An OSG Screw Thread Insert STI Tap is used to cut internal threads in a workpiece before installing a helical wire thread insert. It is commonly applied in aerospace, automotive, and industrial maintenance to repair or reinforce stripped threads in metal components.

What are the specifications of the OSG STI Tap 10800500?

The OSG STI Tap 10800500 has a 7/16"-14 UNC thread size, H4 / 2B-3B tolerance, 4 flutes, and a bottoming chamfer. It is a spiral-flute tap designed for thread insert installation. The part number is 10800500 and the SKU is 33ZF14.

Where to buy OSG STI Taps worldwide?

You can source OSG STI Taps 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 tooling.

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

Select an OSG STI Tap that matches the thread insert's size and tolerance. For a 7/16"-14 UNC insert, use the corresponding STI tap with H4 / 2B-3B tolerance. Ensure the tap has a bottoming chamfer for blind holes and spiral flutes for chip evacuation in through-hole applications.

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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