OSG #4-40 UNC Spiral-Point STI Tap for Nickel & Titanium
The OSG Screw Thread Insert STI Tap is a #4-40 UNC spiral-point tap with a Plug Chamfer, designed for threading nickel and titanium. It features 3 flutes and an H2 / 2B-3B tolerance class (MPN 31420208). 3G Electric…
SKU 3G-OTH-279732
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Product Description
The OSG Screw Thread Insert STI Tap is a #4-40 UNC spiral-point tap with a Plug Chamfer, designed for threading nickel and titanium. It features 3 flutes and an H2 / 2B-3B tolerance class (MPN 31420208). 3G Electric sources this specialist tool as part of our broad industrial supply across 14 departments, with deep expertise in combustion, pumps and controls.
Frequently Asked Questions
What is an OSG Screw Thread Insert STI Tap used for?
An OSG Screw Thread Insert STI Tap is used to cut internal threads in nickel and titanium alloys before installing helical thread inserts. Its spiral-point design pushes chips forward, making it ideal for through-hole applications in aerospace, automotive, and industrial machining where thread strength is critical.
What are the specifications of the OSG STI Tap #4-40 UNC?
This OSG STI Tap has a #4-40 UNC thread size, H2 / 2B-3B tolerance, 3 flutes, and a plug chamfer. It is designed specifically for screw thread insert (STI) applications in nickel and titanium. The manufacturer part number is 31420208.
Where to buy OSG STI Taps for nickel and titanium worldwide?
3G Electric supplies OSG STI Taps like the #4-40 UNC spiral-point model (MPN 31420208) to customers worldwide. We handle full logistics, customs clearance, and delivery, ensuring you receive the correct tool for machining nickel and titanium alloys, regardless of your location.
How to select the correct STI tap for thread inserts?
Select an STI tap based on the thread insert size (e.g., #4-40 UNC), material (nickel/titanium require spiral-point or spiral-flute designs), and tolerance class (H2 / 2B-3B). OSG taps are engineered for these demanding materials. Always match the tap chamfer (plug, bottoming) to your hole type.
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3G Electric supplies OSG spiral-point sti taps for nickel & titanium. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
