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OSG Screw Thread Insert STI Tap: Spiral Fute, 5/16"-24 UNF, H3 / 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, 5/16"-24 UNF, H3 / 2B-3B, 3 Flute

The OSG Screw Thread Insert STI Tap (MPN 0146708) is a spiral-flute tap designed for steel and stainless steel, featuring a 5/16"-24 UNF thread size, H3 / 2B-3B tolerance, 3 flutes, and a bottoming chamfer. This tool…

SKU 3G-OTH-244328

Brand
OSG
Item
Screw Thread Insert STI Tap: Spiral Fute, 5/16"-24 UNF, H3 / 2B-3B, 3 Flute
Category
Spiral-Flute STI Taps for Steel & Stainless Steel
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Technical Specifications

OSG
Manufacturer Part Number
0146708
Type
H3 / 2B-3B, Bottoming Chamfer
Flute
3
UNF
5/16"-24
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The OSG Screw Thread Insert STI Tap (MPN 0146708) is a spiral-flute tap designed for steel and stainless steel, featuring a 5/16"-24 UNF thread size, H3 / 2B-3B tolerance, 3 flutes, and a bottoming chamfer. This tool is engineered for threading applications requiring insert installation, with specifications that ensure precise thread formation in demanding materials.

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 steel and stainless steel for screw thread inserts. It creates threads that accept helical coil inserts, commonly used in aerospace, automotive, and industrial maintenance to repair or strengthen tapped holes.

What are the specifications of the OSG STI tap 0146708?

The OSG STI tap 0146708 has a UNF thread size of 5/16"-24, with a H3 / 2B-3B tolerance class. It features 3 spiral flutes and a bottoming chamfer, designed for threading steel and stainless steel. The manufacturer part number is 0146708.

Where to buy OSG STI taps 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 0146708 tap.

How to select the correct OSG STI tap for a repair job?

To select the correct OSG STI tap, match the thread size and pitch to the insert you plan to use. For steel or stainless steel, choose a spiral-flute design with a bottoming chamfer for blind holes. Verify the tolerance class (e.g., H3 / 2B-3B) matches your required fit.

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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