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OSG Screw Thread Insert STI Tap: Spiral Fute, 1"-8 UNC, H4 / 2B-3B, 4 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, 1"-8 UNC, H4 / 2B-3B, 4 Flute

The OSG Screw Thread Insert STI Tap is a spiral-flute tap for steel and stainless steel, specified as 1"-8 UNC with an H4 / 2B-3B tolerance, 4 flutes, and a bottoming chamfer (MPN 30206308). 3G Electric interprets…

SKU 3G-OTH-244320

Brand
OSG
Item
Screw Thread Insert STI Tap: Spiral Fute, 1"-8 UNC, H4 / 2B-3B, 4 Flute
Category
Spiral-Flute STI Taps for Steel & Stainless Steel
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Technical Specifications

OSG
Manufacturer Part Number
30206308
Type
H4 / 2B-3B, Bottoming Chamfer
Flute
4
UNC
1"-8
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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 1"-8 UNC with an H4 / 2B-3B tolerance, 4 flutes, and a bottoming chamfer (MPN 30206308). 3G Electric interprets this demand and sources the genuine OSG tool, backed by specialist expertise across 14 industrial departments — including cutting tools — to ensure you get the right solution.

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 heavy equipment manufacturing where strong, wear-resistant threads are required.

What are the specifications of the OSG 30206308 STI tap?

The OSG 30206308 is a spiral-flute STI tap with a 1"-8 UNC thread, H4 / 2B-3B tolerance, 4 flutes, and a bottoming chamfer. It is designed for tapping steel and stainless steel to accept screw thread inserts.

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 facility. Contact us for availability and lead time.

How to select the correct STI tap for a 1"-8 UNC thread?

Select an STI tap marked for the same thread size and pitch as the insert, such as 1"-8 UNC. Ensure the tap has the correct tolerance (e.g., H4 / 2B-3B) and chamfer type—bottoming for blind holes, plug for through holes. OSG taps are a reliable choice for steel and stainless steel.

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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