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OSG 5/8"-18 UNF Spiral-Point STI Tap, H4 / 2B-3B, Plug Chamfer, 3 Flutes - Spiral-Point STI Taps
OSGSpiral-Point STI Taps

OSG 5/8"-18 UNF Spiral-Point STI Tap, H4 / 2B-3B, Plug Chamfer, 3 Flutes

The OSG Screw Thread Insert STI Tap is a spiral-point tap for 5/8"-18 UNF threads, featuring an H4 / 2B-3B tolerance with a plug chamfer and 3 flutes (MPN 12501600). 3G Electric interprets this demand and sources the…

SKU 3G-OTH-286995

Brand
OSG
Item
5/8"-18 UNF Spiral-Point STI Tap, H4 / 2B-3B, Plug Chamfer, 3 Flutes
Part Number
12501600
Category
Spiral-Point STI Taps
Available to Order
Also known as:12501600OSG
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Technical Specifications

OSG
Manufacturer Part Number
12501600
Type
H4 / 2B-3B, Plug Chamfer
Flute
3
UNF
5/8"-18

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

Product Description

The OSG Screw Thread Insert STI Tap is a spiral-point tap for 5/8"-18 UNF threads, featuring an H4 / 2B-3B tolerance with a plug chamfer and 3 flutes (MPN 12501600). 3G Electric interprets this demand and sources the genuine OSG tool, backed by specialist expertise across 14 industrial departments.

Frequently Asked Questions

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

An OSG Screw Thread Insert STI Tap cuts internal threads in a pre-drilled hole to accept a helical wire thread insert. It is used in industrial maintenance and production to repair or reinforce stripped threads in metals and plastics, restoring fastener integrity without replacing the parent component.

What are the specifications of the OSG STI Tap 5/8"-18 UNF?

This OSG STI Tap has a 5/8"-18 UNF thread, H4 / 2B-3B tolerance, 3 flutes, and a plug chamfer. It is a spiral-point design for through-hole tapping. The manufacturer part number is 12501600. These specs ensure proper fit for STI inserts in unified fine threads.

Where to buy OSG STI Taps worldwide?

3G Electric supplies OSG STI Taps worldwide. We handle full logistics, customs clearance, and delivery to your facility. As a global industrial sourcing partner, we provide genuine OSG cutting tools like the 5/8"-18 UNF spiral-point tap (MPN 12501600) for maintenance and production needs.

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

Select an OSG STI Tap that matches the thread size and pitch of the insert you will install. For a 5/8"-18 UNF insert, use this tap with H4 / 2B-3B tolerance. Ensure the tap chamfer (plug for through-holes) and flute count suit your material. Always follow the insert manufacturer's drill size recommendations.

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
OSG
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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