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OSG Spiral Flute Tap: 1/4"-28 UNF, H4 / 2B-3B, 3 Flute - Spiral-Flute Taps for Steel & Stainless Steel
OSGSpiral-Flute Taps for Steel & Stainless Steel

OSG Spiral Flute Tap: 1/4"-28 UNF, H4 / 2B-3B, 3 Flute

The OSG Spiral Flute Tap (MPN 1703601) is a 1/4"-28 UNF spiral-flute tap for steel and stainless steel, featuring a H4 / 2B-3B tolerance, 3-flute design, and modified bottoming chamfer. 3G Electric interprets this…

SKU 3G-OTH-218744

Brand
OSG
Item
Spiral Flute Tap: 1/4"-28 UNF, H4 / 2B-3B, 3 Flute
Category
Spiral-Flute Taps for Steel & Stainless Steel
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Technical Specifications

OSG
Manufacturer Part Number
1703601
Type
H4 / 2B-3B, Modified Bottoming Chamfer
Flute
3
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The OSG Spiral Flute Tap (MPN 1703601) is a 1/4"-28 UNF spiral-flute tap for steel and stainless steel, featuring a H4 / 2B-3B tolerance, 3-flute design, and modified bottoming chamfer. 3G Electric interprets this demand and sources genuine industrial equipment across 14 departments, with specialist depth in combustion, pumps, and controls as an authorised distributor.

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 1/4-28 UNF used for?

This OSG spiral flute tap is designed for threading blind holes in steel and stainless steel. The spiral flute design evacuates chips upward, preventing clogging in deep or blind holes. It is commonly used in automotive, aerospace, and general manufacturing applications requiring precise UNF threads.

What are the specifications of the OSG 1/4-28 UNF spiral flute tap?

The OSG spiral flute tap (MPN 1703601) has a 1/4-28 UNF thread size, H4 / 2B-3B tolerance, 3 flutes, and a modified bottoming chamfer. It is designed for threading blind holes in steel and stainless steel. The H4 tolerance ensures fit for 2B or 3B class threads.

Where to buy OSG taps in worldwide?

3G Electric supplies OSG taps worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time on the OSG spiral flute tap 1/4-28 UNF (MPN 1703601). We source and deliver to any country.

How to select the correct OSG tap for steel threading?

For threading blind holes in steel, choose a spiral flute tap like this OSG 1/4-28 UNF model. The spiral flutes push chips out of the hole, preventing breakage. Ensure the tap tolerance (H4 / 2B-3B) matches your thread class requirement. Use appropriate cutting fluid for steel to extend tool life.

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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