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OSG Screw Thread Insert STI Tap: Spiral Fute, 7/16"-20 UNF, H4 / 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, 7/16"-20 UNF, H4 / 2B-3B, 3 Flute

The OSG Screw Thread Insert STI Tap is a spiral-flute tap for steel and stainless steel, model 0147508. It features a 7/16"-20 UNF thread, H4 / 2B-3B tolerance, 3 flutes, and a bottoming chamfer.

SKU 3G-OTH-244210

Brand
OSG
Item
Screw Thread Insert STI Tap: Spiral Fute, 7/16"-20 UNF, H4 / 2B-3B, 3 Flute
Category
Spiral-Flute STI Taps for Steel & Stainless Steel
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Technical Specifications

OSG
Manufacturer Part Number
0147508
Type
H4 / 2B-3B, Bottoming Chamfer
Flute
3
UNF
7/16"-20
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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, model 0147508. It features a 7/16"-20 UNF thread, H4 / 2B-3B tolerance, 3 flutes, and a bottoming chamfer.

Frequently Asked Questions

What is the OSG 0147508 STI tap used for?

The OSG 0147508 is a spiral-flute STI tap designed for cutting internal threads in steel and stainless steel. It is used to prepare holes for screw thread inserts, ensuring a precise H4 / 2B-3B fit. Common applications include automotive, aerospace, and general manufacturing where strong, wear-resistant threads are required.

What are the specifications of the OSG 0147508 STI tap?

The OSG 0147508 is a 7/16"-20 UNF spiral-flute STI tap with a bottoming chamfer and 3 flutes. It has an H4 / 2B-3B tolerance class, making it suitable for thread insert installation in steel and stainless steel. The manufacturer part number is 0147508, and it is designed for high-precision threading.

Where to buy the OSG 0147508 STI tap worldwide?

3G Electric supplies the OSG 0147508 STI tap worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we source and deliver this OSG tap to meet your production needs.

How to select the correct OSG STI tap for thread inserts?

To select the correct OSG STI tap, match the thread size (e.g., 7/16"-20 UNF) and tolerance class (H4 / 2B-3B) to your insert specifications. Choose a spiral-flute design for steel or stainless steel to improve chip evacuation. A bottoming chamfer allows threading to the bottom of blind holes. Always verify the tap's flute count and coating for your material.

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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