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OSG 1/2"-20 UNF General Purpose STI Tap, H3 / 2B-3B, Plug Chamfer, 4 Flute - General Purpose STI Taps
OSGGeneral Purpose STI Taps

OSG 1/2"-20 UNF General Purpose STI Tap, H3 / 2B-3B, Plug Chamfer, 4 Flute

The OSG Screw Thread Insert STI Tap (Straight Flute) is a general-purpose STI tap for 1/2"-20 UNF threads. It features a Plug Chamfer, 4 flutes, and an H3 / 2B-3B tolerance class (MPN 1813800).

SKU 3G-OTH-262123

Brand
OSG
Item
1/2"-20 UNF General Purpose STI Tap, H3 / 2B-3B, Plug Chamfer, 4 Flute
Part Number
1813800
Category
General Purpose STI Taps
Available to Order
Also known as:1813800OSG
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Technical Specifications

OSG
Manufacturer Part Number
1813800
Type
H3 / 2B-3B, Plug Chamfer
Flute
4
UNF
1/2"-20

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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 1/2"-20 UNF threads. It features a Plug Chamfer, 4 flutes, and an H3 / 2B-3B tolerance class (MPN 1813800).

Frequently Asked Questions

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

The OSG Screw Thread Insert STI Tap is used to cut internal threads in metal or plastic for installing helical wire thread inserts. It is commonly applied in automotive, aerospace, and general manufacturing to repair or reinforce threaded holes, ensuring strong, wear-resistant connections.

What are the specifications of the OSG STI Tap 1813800?

The OSG STI Tap 1813800 is a general-purpose tap with a 1/2"-20 UNF thread, H3 / 2B-3B tolerance, 4 flutes, and a plug chamfer. It has a straight flute design for chip evacuation. The H3 / 2B-3B specification ensures compatibility with standard thread insert classes.

Where to buy OSG STI Tap 1813800 worldwide?

You can source the OSG STI Tap 1813800 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply genuine OSG tooling for your manufacturing needs.

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

Select an OSG STI tap based on the thread size and class of the insert. For a 1/2"-20 UNF insert, use a tap with matching pitch and H3 / 2B-3B tolerance. Ensure the tap has a plug chamfer for through-hole applications. Always match the tap to the insert manufacturer's specifications for proper 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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