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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
OSGSpiral-Flute STI Taps

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 8013700) is a spiral-flute tap for 5/16"-24 UNF threads, featuring an H3 / 2B-3B tolerance class, 3 flutes, and a bottoming chamfer design. 3G Electric interprets demand and…

SKU 3G-OTH-273371

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

OSG
Manufacturer Part Number
8013700
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 8013700) is a spiral-flute tap for 5/16"-24 UNF threads, featuring an H3 / 2B-3B tolerance class, 3 flutes, and a bottoming chamfer design. 3G Electric interprets demand and delivers this genuine industrial tool across 14 departments, with specialist depth in cutting tools and controls.

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 for screw thread inserts in metal parts. It is ideal for through-hole applications in automotive, aerospace, and general manufacturing where chip evacuation is critical. The bottoming chamfer allows threading close to the bottom of a blind hole.

What are the specifications of the OSG 8013700 STI tap?

The OSG 8013700 is a spiral-flute STI tap with UNF thread size 5/16"-24, H3 / 2B-3B tolerance, 3 flutes, and a bottoming chamfer. It is designed for threading holes that will accept screw thread inserts. The H3 / 2B-3B designation ensures precise fit for insert installation.

Where to buy OSG taps in worldwide?

You can source OSG 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 8013700 STI tap and other cutting tools.

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

Select an STI tap that matches the insert's thread size and pitch, such as 5/16"-24 UNF. Use a bottoming chamfer for blind holes and a spiral-flute design for through holes to improve chip evacuation. The H3 / 2B-3B tolerance ensures proper fit. OSG taps are a reliable choice for precision threading.

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

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