OSG Spiral Point Tap: #4-40 UNC, H2 / 2B-3B, 2 Flute, Plug Chamfer
The OSG Spiral Point Tap (#4-40 UNC, MPN 1651500108) is a spiral-point tap for steel and stainless steel, featuring a H2 / 2B-3B tolerance, 2-flute design, plug chamfer, and V Coated Powdered Metal construction.
SKU 3G-OTH-223915
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Product Description
The OSG Spiral Point Tap (#4-40 UNC, MPN 1651500108) is a spiral-point tap for steel and stainless steel, featuring a H2 / 2B-3B tolerance, 2-flute design, plug chamfer, and V Coated Powdered Metal construction.
Frequently Asked Questions
What is the OSG spiral point tap #4-40 UNC used for?
The OSG spiral point tap #4-40 UNC is designed for threading through-holes in steel and stainless steel. Its spiral point design pushes chips ahead, reducing chip clogging. The V coated powdered metal construction provides wear resistance for production tapping. It is commonly used in automotive, aerospace, and general manufacturing applications.
What are the specifications of the OSG spiral point tap #4-40 UNC?
The OSG spiral point tap has a #4-40 UNC thread size, H2 / 2B-3B tolerance, 2 flutes, and a plug chamfer. It features a V coating on powdered metal substrate. The manufacturer part number is 1651500108. This tap is optimized for through-hole tapping in steel and stainless steel workpieces.
Where to buy OSG spiral point taps in worldwide?
You can source OSG spiral point 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. 3G Electric supplies genuine OSG cutting tools for manufacturing operations across industries.
How to select the correct OSG tap for steel threading?
Select an OSG tap based on material, thread type, and hole configuration. For through-holes in steel, a spiral point tap like the #4-40 UNC with V coating is ideal. Match thread class (e.g., H2 / 2B-3B) to your tolerance requirements. Ensure the tap size matches your hole diameter. Consult OSG technical data for feed and speed recommendations.
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3G Electric supplies OSG spiral-point taps for steel & stainless steel. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.














