OSG Screw Thread Insert STI Tap: Straight Fute, 5/8"-18 UNF, H4 / 2B-3B, 4 Flute
The OSG Screw Thread Insert STI Tap (Straight Flute, MPN 12603000) is a general-purpose STI tap with a 5/8"-18 UNF thread, H4 / 2B-3B tolerance, 4 flutes, and a bottoming chamfer. 3G Electric interprets your demand…
SKU 3G-OTH-262111
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Product Description
The OSG Screw Thread Insert STI Tap (Straight Flute, MPN 12603000) is a general-purpose STI tap with a 5/8"-18 UNF thread, H4 / 2B-3B tolerance, 4 flutes, and a bottoming chamfer. 3G Electric interprets your demand for this precision threading tool, sources it from OSG, and supports your application across 14 industrial departments — with specialist depth in combustion, pumps, and controls as a trust anchor.
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 components for installing screw thread inserts. It is commonly applied in aerospace, automotive, and general manufacturing where thread repair or reinforcement is needed. This tap produces threads that accommodate standard STI inserts.
What are the specifications of the OSG STI Tap 12603000?
The OSG STI Tap 12603000 has a thread size of 5/8"-18 UNF, with a H4 / 2B-3B tolerance class. It features a straight flute design, 4 flutes, and a bottoming chamfer. This general-purpose tap is designed for cutting threads in materials requiring STI inserts.
Where to buy OSG STI Tap 12603000 worldwide?
You can source the OSG STI Tap 12603000 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 on this OSG tap.
How to select the correct OSG STI tap for thread repair?
To select the correct OSG STI tap, match the thread size and pitch to the insert you plan to use. For the 12603000 model, ensure your application requires a 5/8"-18 UNF thread with a H4 tolerance for 2B-3B fit. Use a bottoming chamfer for blind holes and straight flutes for general-purpose threading.
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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.















