OSG Spiral Flute Tap: 5/16"-24 UNF, H4 / 2B-3B, 3 Flute, Bottoming Chamfer
The OSG Spiral Flute Tap (5/16"-24 UNF) is a bottoming-chamfer, 3-flute tap made from V-coated powdered metal, with an H4 / 2B-3B tolerance class (MPN 1650511408). Designed for threading steel and stainless steel, it…
SKU 3G-OTH-217837
Need installation or engineering help?
Ask a question
Product Description
The OSG Spiral Flute Tap (5/16"-24 UNF) is a bottoming-chamfer, 3-flute tap made from V-coated powdered metal, with an H4 / 2B-3B tolerance class (MPN 1650511408). Designed for threading steel and stainless steel, it is supplied by 3G Electric, a global industrial solutions provider that interprets customer demand and delivers genuine equipment across 14 departments, with specialist depth in combustion, pumps and controls.
Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.
Frequently Asked Questions
What is the OSG spiral flute tap 5/16-24 UNF used for?
This OSG spiral flute tap is designed for threading blind holes in steel and stainless steel. Its V-coated powdered metal construction and bottoming chamfer allow it to cut threads close to the bottom of a hole, making it ideal for automotive, aerospace, and general manufacturing applications.
What are the specifications of the OSG 1650511408 tap?
The OSG 1650511408 is a spiral flute tap with thread size 5/16-24 UNF, H4 / 2B-3B tolerance, 3 flutes, and a bottoming chamfer. It is made of V-coated powdered metal, designed for threading blind holes in steel and stainless steel. The H4 limit ensures precise thread fit for class 2B-3B applications.
Where to buy OSG taps in worldwide?
You can source OSG taps, including the 1650511408 spiral flute tap, through 3G Electric. As 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 and other OSG threading tools.
How to select the correct OSG tap for stainless steel?
For stainless steel, choose a tap with a spiral flute design to evacuate chips upward in blind holes. The OSG 1650511408 features a V-coated powdered metal body and H4 / 2B-3B tolerance, providing wear resistance and precise thread cutting. Ensure the tap matches your hole size and thread class for optimal performance.
Used in
Common applications for OSGOSG Products
3G Electric supplies OSG spiral-flute taps for steel & stainless steel. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.















