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OSG #4-40 UNC Spiral-Flute Tap, H4 / 2B-3B, 2 Flute, Modified Bottoming Chamfer - Spiral-Flute Taps for Steel & Stainless Steel
OSGSpiral-Flute Taps for Steel & Stainless Steel

OSG #4-40 UNC Spiral-Flute Tap, H4 / 2B-3B, 2 Flute, Modified Bottoming Chamfer

OSG Spiral-Flute Taps for Steel & Stainless Steel.

SKU 3G-OTH-218925

Brand
OSG
Item
#4-40 UNC Spiral-Flute Tap, H4 / 2B-3B, 2 Flute, Modified Bottoming Chamfer
Category
Spiral-Flute Taps for Steel & Stainless Steel
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

OSG
Manufacturer Part Number
1748101

Technical Documents

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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

OSG Spiral-Flute Taps for Steel & Stainless Steel.

Frequently Asked Questions

What is the OSG spiral flute tap #4-40 UNC used for?

The OSG spiral flute tap #4-40 UNC is designed for threading blind holes in steel and stainless steel. Its spiral flute design evacuates chips upward, preventing clogging and enabling clean threads in deep or blind applications. The modified bottoming chamfer allows threading close to the hole bottom.

What are the specifications of the OSG tap 1748101?

The OSG tap 1748101 is a #4-40 UNC spiral flute tap with an H4 / 2B-3B tolerance class. It has 2 flutes and a modified bottoming chamfer. This tap is intended for threading steel and stainless steel. The H4 tolerance ensures precise thread fit for 2B-3B class threads.

Where to buy OSG taps in worldwide?

You can source OSG 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 spiral flute tap 1748101 or other OSG tooling.

How to select the correct OSG tap for stainless steel?

For stainless steel, select a spiral flute tap like the OSG #4-40 UNC with an H4 tolerance for precise thread fit. Ensure the tap has a modified bottoming chamfer for blind holes. Use appropriate cutting fluid and follow manufacturer speed/feed recommendations to avoid work hardening and tool breakage.

Used in

Common applications for OSG
Automotive engine block production — OSG micro drill bits for oil gallery and coolant passage drilling in cast iron
Medical device manufacturing — OSG micro drill bits for drilling bone screw pilot holes in stainless steel implants
Aerospace component machining — OSG micro drill bits for fastener holes in titanium alloy structural parts
Mold and die making — OSG micro drill bits for cooling channel drilling in hardened tool steel (HRC 45-50)
Electronics enclosure fabrication — OSG micro drill bits for precision holes in aluminum alloy housings (with appropriate coating selection)
General engineering job shops — OSG micro drill bits for small-diameter hole drilling in mild steel and alloy steel parts

OSG 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.

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