OSG Screw Thread Insert STI Tap: Spiral Point, 1/2"-20 UNF, H4 / 2B-3B, 3 Flute
The OSG Screw Thread Insert STI Tap is a spiral-point tap for multiple materials, specified as 1/2"-20 UNF with H4 / 2B-3B tolerance, 3 flutes, and a plug chamfer (MPN 31402301).
SKU 3G-OTH-284685
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 OSG Screw Thread Insert STI Tap is a spiral-point tap for multiple materials, specified as 1/2"-20 UNF with H4 / 2B-3B tolerance, 3 flutes, and a plug chamfer (MPN 31402301).
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 multiple materials for installing screw thread inserts. It is commonly applied in aerospace, automotive, and general manufacturing where strong, wear-resistant threads are required in aluminum, steel, and cast iron.
What are the specifications of the OSG 31402301 STI Tap?
The OSG 31402301 is a spiral-point STI tap with a 1/2"-20 UNF thread, H4 / 2B-3B tolerance, 3 flutes, and a plug chamfer. It is designed for through-hole threading in multiple materials and is manufactured by OSG.
Where to buy OSG STI taps in worldwide?
You can source OSG STI taps worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on the OSG 31402301.
How to select the correct STI tap size for a screw thread insert?
Select an STI tap that matches the insert's thread size and pitch, such as 1/2"-20 UNF. The tap tolerance (e.g., H4 / 2B-3B) must align with the insert's class. OSG taps are designed for multiple materials; verify material compatibility and use proper cutting fluid for best results.
Used in
Common applications for OSGOSG Products
3G Electric supplies OSG spiral-point sti taps for multiple materials. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
