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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).

SKU 3G-OTH-262094

Brand
OSG
Item
Screw Thread Insert STI Tap: Straight Fute, 5/16"-18 UNC, H3 / 2B-3B, 4 Flute
Part Number
1812500
Category
General Purpose STI Taps
Available to Order
Also known as:1812500OSG
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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).

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
Aerospace — OSG STI taps for installing helical wire thread inserts in aluminum components
Automotive — OSG spiral-point taps for through-hole threading in engine blocks and transmission cases
General machining — OSG spiral-flute taps for blind-hole threading in steel and stainless steel parts
Heavy equipment repair — OSG thread-forming taps for creating threads in ductile iron and steel castings
Precision manufacturing — OSG solid carbide chucking reamers for finishing holes in hydraulic manifolds
Die and mold — OSG coolant-through solid carbide drills for deep-hole drilling in tool steels
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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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