HELI-COIL Screw Thread Insert STI Tap: Straight Fute, 9/16"-18 UNF, H3 / 3B, 4 Flute
The HELI-COIL Screw Thread Insert STI Tap is a straight flute, general-purpose tap for 9/16"-18 UNF threads, with H3 / 3B tolerance and a plug chamfer. It features 4 flutes and is manufactured by HELI-COIL under part…
SKU 3G-OTH-262128
Also listed as: 381939 · 38193 9
Local availability & support
- Delivery
- Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
- Payment
- Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.
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Product Description
The HELI-COIL Screw Thread Insert STI Tap is a straight flute, general-purpose tap for 9/16"-18 UNF threads, with H3 / 3B tolerance and a plug chamfer. It features 4 flutes and is manufactured by HELI-COIL under part number 38193-9.
Frequently Asked Questions
What is a HELI-COIL STI tap used for?
A HELI-COIL STI tap cuts threads for installing screw thread inserts in metal, plastic, or composite materials. It is used in automotive, aerospace, and industrial maintenance to repair stripped threads or strengthen threaded holes in softer materials.
What are the specifications of the HELI-COIL 38193-9 STI tap?
This HELI-COIL STI tap has a 9/16"-18 UNF thread, H3 / 3B tolerance, 4 flutes, and a plug chamfer. It is designed for general-purpose thread repair and insert installation, ensuring accurate thread class fit.
Where to buy HELI-COIL STI taps worldwide?
3G Electric supplies HELI-COIL STI taps worldwide. We handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this 9/16"-18 UNF tap (MPN 38193-9).
How to select the correct STI tap for a HELI-COIL insert?
Select an STI tap that matches the insert's thread size and pitch, such as 9/16"-18 UNF. Use a plug chamfer for through holes or blind holes with sufficient depth. Ensure the tap tolerance (H3 / 3B) aligns with the required thread class.
Used in
Common applications for HELI-COILHELI-COIL Products
3G Electric supplies HELI-COIL general purpose sti taps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
