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OSG Screw Thread Insert STI Tap: Straight Fute, 5/16"-18 UNC, H3 / 2B-3B, 4 Flute - General Purpose STI Taps
OSGGeneral Purpose STI Taps

OSG Screw Thread Insert STI Tap: Straight Fute, 5/16"-18 UNC, H3 / 2B-3B, 4 Flute

The OSG Screw Thread Insert STI Tap (Straight Flute) is a general-purpose STI tap for 5/16"-18 UNC threads. It features a H3 / 2B-3B tolerance, 4 flutes, and a bottoming chamfer (MPN 1812500). 3G Electric interprets…

SKU 3G-OTH-262094

Brand
OSG
Item
Screw Thread Insert STI Tap: Straight Fute, 5/16"-18 UNC, H3 / 2B-3B, 4 Flute
Category
General Purpose STI Taps
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Technical Specifications

OSG
Manufacturer Part Number
1812500
Type
H3 / 2B-3B, Bottoming Chamfer
Flute
4
UNC
5/16"-18
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The OSG Screw Thread Insert STI Tap (Straight Flute) is a general-purpose STI tap for 5/16"-18 UNC threads. It features a H3 / 2B-3B tolerance, 4 flutes, and a bottoming chamfer (MPN 1812500). 3G Electric interprets demand and delivers this genuine industrial tool across 14 departments, with specialist depth in combustion, pumps, and controls as an authorised distributor.

Frequently Asked Questions

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

This OSG STI tap is used to cut internal threads for screw thread inserts in metal parts. It is designed for general-purpose tapping in industrial maintenance and production environments, creating threads that accept helical coil inserts for stronger fastening in softer materials.

What are the specifications of the OSG STI Tap 1812500?

The OSG STI Tap (MPN 1812500) has a 5/16"-18 UNC thread size, H3 / 2B-3B tolerance, 4 flutes, and a bottoming chamfer. It is a straight flute, general-purpose tap for thread insert installation. 3G Electric supplies this OSG tap worldwide.

Where to buy OSG STI Tap 1812500 worldwide?

3G Electric supplies the OSG STI Tap 1812500 to customers worldwide. 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 globally.

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

Select an OSG STI tap based on the insert's thread size and pitch, such as 5/16"-18 UNC. Ensure the tap has the correct tolerance (e.g., H3 / 2B-3B) and chamfer type (bottoming for blind holes). Always match the tap to the insert manufacturer's specifications for proper thread 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 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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