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OSG Screw Thread Insert STI Tap: Straight Fute, 7/16"-20 UNF, H4 / 2B-3B, 4 Flute - General Purpose STI Taps
OSGGeneral Purpose STI Taps

OSG Screw Thread Insert STI Tap: Straight Fute, 7/16"-20 UNF, H4 / 2B-3B, 4 Flute

SKU 3G-OTH-262139

Brand
OSG
Item
Screw Thread Insert STI Tap: Straight Fute, 7/16"-20 UNF, H4 / 2B-3B, 4 Flute
Category
General Purpose STI Taps
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Technical Specifications

OSG
Manufacturer Part Number
12600900
Type
H4 / 2B-3B, Plug Chamfer
Flute
4
UNF
7/16"-20
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Frequently Asked Questions

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

An OSG Screw Thread Insert STI Tap cuts internal threads in a pre-drilled hole to accept a helical wire thread insert. It is used in metalworking and maintenance applications to restore or strengthen threads in softer materials like aluminum or cast iron.

What are the specifications of the OSG STI Tap 7/16"-20 UNF?

This OSG STI Tap has a 7/16"-20 UNF thread size, H4 / 2B-3B tolerance, 4 flutes, and a plug chamfer. It is designed for general-purpose thread repair and insert installation. The manufacturer part number is 12600900.

Where to buy OSG STI Taps worldwide?

3G Electric supplies OSG STI Taps worldwide. We handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this 7/16"-20 UNF tap, part number 12600900.

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

Select an STI tap that matches the thread size and pitch of the insert you are installing. For a 7/16"-20 UNF insert, use an STI tap with the same designation. The tap tolerance (e.g., H4 / 2B-3B) must suit the required class of fit for the application.

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 general purpose 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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