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OSG Screw Thread Insert STI Tap: Straight Fute, #4-40 UNC, H2 / 2B-3B, 3 Flute - General Purpose STI Taps
OSGGeneral Purpose STI Taps

OSG Screw Thread Insert STI Tap: Straight Fute, #4-40 UNC, H2 / 2B-3B, 3 Flute

SKU 3G-OTH-261976

Brand
OSG
Item
Screw Thread Insert STI Tap: Straight Fute, #4-40 UNC, H2 / 2B-3B, 3 Flute
Category
General Purpose STI Taps
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Technical Specifications

OSG
Manufacturer Part Number
1804000
Type
#4-40 UNC, H2 / 2B-3B, Plug Chamfer
Flute
3
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

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 metal components, ensuring strong, reusable connections.

What are the specifications of the OSG STI Tap #4-40 UNC?

This OSG STI Tap is #4-40 UNC with a H2 / 2B-3B tolerance, 3 straight flutes, and a plug chamfer. It is designed for general-purpose thread insert installation. The manufacturer part number is 1804000.

Where to buy OSG STI Taps for worldwide delivery?

3G Electric supplies OSG STI Taps like the #4-40 UNC model (MPN 1804000) to customers worldwide. We handle full logistics, customs clearance, and delivery to your facility. Contact us for a quote and lead time on this precision threading tool.

How to select the correct STI tap size for a thread insert?

Select an STI tap that matches the thread insert's nominal size and pitch, such as #4-40 UNC. The tap's H2 / 2B-3B tolerance ensures proper fit for the insert. Always verify the tap's chamfer type (plug, bottoming, or taper) matches your hole depth and application requirements.

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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