OSG Screw Thread Insert STI Tap: Spiral Point, 1/4"-20 UNC, H2 / 2B-3B, 3 Flute
The OSG Screw Thread Insert STI Tap: Spiral Point (MPN 31400708) is a 1/4"-20 UNC spiral-point tap with H2 / 2B-3B tolerance, 3 flutes, and a plug chamfer. Designed for threading multiple materials, it is engineered…
SKU 3G-OTH-284747
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Product Description
The OSG Screw Thread Insert STI Tap: Spiral Point (MPN 31400708) is a 1/4"-20 UNC spiral-point tap with H2 / 2B-3B tolerance, 3 flutes, and a plug chamfer. Designed for threading multiple materials, it is engineered for STI (screw thread insert) applications. 3G Electric interprets your demand and sources this genuine OSG tap across 14 industrial departments, with specialist depth in cutting tools and fastening solutions.
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 automotive, aerospace, and general manufacturing where strong, wear-resistant threads are needed in softer base materials.
What are the specifications of the OSG 31400708 STI Tap?
The OSG 31400708 is a spiral-point STI tap with a 1/4"-20 UNC thread size, H2 / 2B-3B tolerance, 3 flutes, and a plug chamfer. It is designed for threading multiple materials and is manufactured by OSG, a leading cutting tool brand.
Where to buy OSG STI Taps 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 this item.
How to select the correct OSG STI Tap for a thread insert?
Select an OSG STI Tap based on the thread size and pitch of the insert, such as 1/4"-20 UNC. Ensure the tap tolerance (e.g., H2 / 2B-3B) matches the required thread class. Use a plug chamfer for through holes and a spiral-point design for chip evacuation in multiple materials.
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.















