OSG Thread Forming Tap: #4-40 UNC, H7, Modified Bottoming Chamfer, Cobalt (MPN 1400105700)
SKU 3G-OTH-236517
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Frequently Asked Questions
What is an OSG thread forming tap used for?
An OSG thread forming tap creates internal threads by displacing material rather than cutting it, producing stronger threads with no chips. It is ideal for ductile materials like aluminum, brass, and low-carbon steel in automotive, aerospace, and general machining applications.
What are the specifications of the OSG #4-40 UNC thread forming tap?
This OSG tap is #4-40 UNC size with an H7 tolerance, modified bottoming chamfer, and made from cobalt steel. The manufacturer part number is 1400105700. It is designed for general purpose thread forming in through or blind holes.
Where to buy OSG thread forming taps worldwide?
3G Electric supplies OSG thread forming taps worldwide, handling full logistics and customs clearance. As a global industrial solutions provider, we source genuine OSG taps like the #4-40 UNC model (MPN 1400105700) and deliver to any international destination.
How to select the right OSG thread forming tap for my material?
Select an OSG thread forming tap based on material ductility—use for aluminum, brass, or mild steel. Match thread size (e.g., #4-40 UNC), chamfer type (modified bottoming for blind holes), and tap tolerance (H7). Cobalt steel taps offer heat resistance for harder materials.
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Common applications for OSGOSG Products
3G Electric supplies OSG general purpose thread-forming taps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.















