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OSG Screw Thread Insert STI Tap: Spiral Point, 9/16"-18 UNF, H3 / 2B-3B, 3 Flute - Spiral-Point STI Taps
OSGSpiral-Point STI Taps

OSG Screw Thread Insert STI Tap: Spiral Point, 9/16"-18 UNF, H3 / 2B-3B, 3 Flute

The OSG Screw Thread Insert STI Tap (MPN 12501100) is a spiral-point tap designed for 9/16"-18 UNF threads. It features an H3 / 2B-3B tolerance with a plug chamfer and 3 flutes, enabling efficient chip evacuation…

SKU 3G-OTH-287013

Brand
OSG
Item
Screw Thread Insert STI Tap: Spiral Point, 9/16"-18 UNF, H3 / 2B-3B, 3 Flute
Category
Spiral-Point STI Taps
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Technical Specifications

OSG
Manufacturer Part Number
12501100
Type
H3 / 2B-3B, Plug Chamfer
Flute
3
UNF
9/16"-18
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The OSG Screw Thread Insert STI Tap (MPN 12501100) is a spiral-point tap designed for 9/16"-18 UNF threads. It features an H3 / 2B-3B tolerance with a plug chamfer and 3 flutes, enabling efficient chip evacuation during thread insertion in industrial applications.

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 pre-drilled holes for installing helical wire thread inserts. 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 12501100?

The OSG STI Tap 12501100 has a thread size of 9/16"-18 UNF, a thread tolerance of H3 / 2B-3B, 3 flutes, and a plug chamfer. It features a spiral-point design for efficient chip evacuation and is made for use with screw thread inserts.

Where to buy OSG STI Tap 12501100 worldwide?

You can source the OSG STI Tap 12501100 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.

How to select the correct OSG STI tap for a thread repair?

To select the correct OSG STI tap, match the tap's thread size and pitch to the insert's specifications. For the 12501100, use a 9/16"-18 UNF insert. Ensure the tap tolerance (H3 / 2B-3B) aligns with the required thread class. Always follow the insert manufacturer's drilling and tapping guidelines.

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-point 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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