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OSG Screw Thread Insert STI Tap: Spiral Fute, #4-48 UNF, H2 / 2B-3B, 3 Flute - Spiral-Flute STI Taps for Steel & Stainless Steel
OSGSpiral-Flute STI Taps for Steel & Stainless Steel

OSG Screw Thread Insert STI Tap: Spiral Fute, #4-48 UNF, H2 / 2B-3B, 3 Flute

The OSG Screw Thread Insert STI Tap is a spiral-flute tap for steel and stainless steel, specified as #4-48 UNF with H2 / 2B-3B tolerance and a bottoming chamfer. It features 3 flutes and is identified by…

SKU 3G-OTH-244344

Brand
OSG
Item
Screw Thread Insert STI Tap: Spiral Fute, #4-48 UNF, H2 / 2B-3B, 3 Flute
Category
Spiral-Flute STI Taps for Steel & Stainless Steel
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Technical Specifications

OSG
Manufacturer Part Number
30200201
Type
#4-48 UNF, H2 / 2B-3B, Bottoming Chamfer
Flute
3
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The OSG Screw Thread Insert STI Tap is a spiral-flute tap for steel and stainless steel, specified as #4-48 UNF with H2 / 2B-3B tolerance and a bottoming chamfer. It features 3 flutes and is identified by manufacturer part number 30200201.

Frequently Asked Questions

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

This OSG spiral-flute STI tap is designed for cutting internal threads in steel and stainless steel to accept screw thread inserts. It is commonly used in aerospace, automotive, and general manufacturing where strong, wear-resistant threads are required in ferrous materials.

What are the specifications of the OSG STI Tap #4-48 UNF?

The OSG STI tap has a #4-48 UNF thread size, H2 / 2B-3B tolerance, 3 flutes, and a bottoming chamfer. It is a spiral-flute design for steel and stainless steel. The manufacturer part number is 30200201. OSG is the OEM brand for this precision threading tool.

Where to buy OSG STI Tap #4-48 UNF worldwide?

3G Electric supplies the OSG STI Tap #4-48 UNF worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time. We source and deliver this precision threading tool to any country.

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

Select an STI tap that matches the insert's thread size and pitch, such as #4-48 UNF. Use a bottoming chamfer for blind holes or a plug chamfer for through holes. The H2 tolerance ensures a 2B-3B fit. Always refer to the insert manufacturer's recommendations for tap drill size.

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

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