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OSG Screw Thread Insert STI Tap: Spiral Fute, #4-40 UNC, H2 / 2B-3B - Spiral-Flute STI Taps for Aluminum
OSGSpiral-Flute STI Taps for Aluminum

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

SKU 3G-OTH-262364

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

OSG
Manufacturer Part Number
1303900200
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Frequently Asked Questions

What is an OSG spiral-flute STI tap used for?

An OSG spiral-flute STI tap is used to cut internal threads in aluminum for screw thread inserts. It is designed for through-hole applications, with spiral flutes that evacuate chips upward, preventing clogging and ensuring clean threads in softer materials like aluminum.

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

The OSG screw thread insert STI tap has a #4-40 UNC thread size, H2 / 2B-3B tolerance, 2-flute spiral-flute design, and manufacturer part number 1303900200. It is specifically engineered for tapping aluminum to accept STI inserts, ensuring precise thread fit.

Where to buy OSG STI taps in worldwide?

You can source OSG STI taps 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 on the OSG 1303900200 tap.

How to select the correct STI tap for aluminum?

Select an STI tap with the same thread size and pitch as the insert, such as #4-40 UNC. Use a spiral-flute design for through holes in aluminum to improve chip evacuation. The H2 / 2B-3B tolerance ensures proper thread fit for the insert. OSG taps are a reliable choice for this application.

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 for aluminum. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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