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3G Electric
OSG 7/8"-14 UNF Spiral-Point STI Tap, H3 / 2B-3B, Plug Chamfer, 3 Flute - Spiral-Point STI Taps
OSGSpiral-Point STI Taps

OSG 7/8"-14 UNF Spiral-Point STI Tap, H3 / 2B-3B, Plug Chamfer, 3 Flute

The OSG Screw Thread Insert STI Tap (MPN 12502300) is a spiral-point tap for 7/8"-14 UNF threads, featuring an H3 / 2B-3B tolerance and a plug chamfer with 3 flutes.

SKU 3G-OTH-286997

Brand
OSG
Item
7/8"-14 UNF Spiral-Point STI Tap, H3 / 2B-3B, Plug Chamfer, 3 Flute
Part Number
12502300
Category
Spiral-Point STI Taps
Available to Order
Also known as:12502300OSG
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Technical Specifications

OSG
Manufacturer Part Number
12502300
Type
H3 / 2B-3B, Plug Chamfer
Flute
3
UNF
7/8"-14

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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The OSG Screw Thread Insert STI Tap (MPN 12502300) is a spiral-point tap for 7/8"-14 UNF threads, featuring an H3 / 2B-3B tolerance and a plug chamfer with 3 flutes.

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 7/8"-14 UNF?

This OSG STI Tap has a 7/8"-14 UNF thread size, H3 / 2B-3B tolerance, 3-flute spiral-point design, and plug chamfer. The spiral point pushes chips forward, making it suitable for through-hole threading. Manufacturer part number is 12502300.

Where to buy OSG STI Taps worldwide?

3G Electric supplies OSG STI Taps worldwide, handling full logistics and customs clearance for global delivery. As a sourcing partner, we provide genuine OSG cutting tools like the 7/8"-14 UNF spiral-point tap to industrial buyers across multiple sectors.

How to select the correct OSG STI Tap for thread repair?

Select an OSG STI Tap based on the original thread size and pitch (e.g., 7/8"-14 UNF), the required thread class (H3 / 2B-3B), and whether the hole is through or blind. Spiral-point taps suit through holes; spiral-flute taps suit blind holes. Always match the tap to the insert manufacturer's specifications.

Used in

Common applications for OSG
Aerospace — OSG STI taps for installing helical wire thread inserts in aluminum components
Automotive — OSG spiral-point taps for through-hole threading in engine blocks and transmission cases
General machining — OSG spiral-flute taps for blind-hole threading in steel and stainless steel parts
Heavy equipment repair — OSG thread-forming taps for creating threads in ductile iron and steel castings
Precision manufacturing — OSG solid carbide chucking reamers for finishing holes in hydraulic manifolds
Die and mold — OSG coolant-through solid carbide drills for deep-hole drilling in tool steels
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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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This spiral-point STI tap is designed for cutting internal threads in through holes prior to installing helical coil thread inserts. It features a 1"-8 UNC thread, H6 tolerance, plug chamfer, 4 flutes, and is made from high-speed steel. Typical applications include thread repair and reinforcement in metal components

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