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OSG Spiral Flute Tap: 9/16"-18 UNF, H3 / 2B-3B, 4 Flute - General Purpose Spiral-Flute Taps
OSGGeneral Purpose Spiral-Flute Taps

OSG Spiral Flute Tap: 9/16"-18 UNF, H3 / 2B-3B, 4 Flute

The OSG Spiral Flute Tap (9/16"-18 UNF, MPN 2948801) is a general-purpose tap with an H3 / 2B-3B tolerance and a modified bottoming chamfer. It features 4 flutes for efficient chip evacuation in through-hole and…

SKU 3G-OTH-229937

Brand
OSG
Item
Spiral Flute Tap: 9/16"-18 UNF, H3 / 2B-3B, 4 Flute
Category
General Purpose Spiral-Flute Taps
Available to Order
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Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

OSG
Manufacturer Part Number
2948801
Type
H3 / 2B-3B, Modified Bottoming Chamfer
Flute
4

Technical Documents

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

Product Description

The OSG Spiral Flute Tap (9/16"-18 UNF, MPN 2948801) is a general-purpose tap with an H3 / 2B-3B tolerance and a modified bottoming chamfer. It features 4 flutes for efficient chip evacuation in through-hole and blind-hole threading applications.

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 9/16"-18 UNF used for?

This OSG spiral flute tap is designed for threading blind holes in ferrous and non-ferrous materials. Its 4-flute design and modified bottoming chamfer allow chips to be pulled upward, reducing clogging and ensuring clean threads in production machining, automotive, and general manufacturing applications.

What are the specifications of the OSG tap MPN 2948801?

The OSG tap MPN 2948801 is a 9/16"-18 UNF spiral flute tap with a H3 / 2B-3B tolerance class, 4 flutes, and a modified bottoming chamfer. It is designed for threading blind holes to a 2B-3B fit, suitable for general purpose tapping in steel, aluminum, and cast iron.

Where to buy OSG taps like 2948801 worldwide?

3G Electric supplies OSG taps including the 2948801 to customers worldwide. As a global industrial sourcing partner, we handle logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this and other OSG threading tools.

How to select the right spiral flute tap for blind holes?

For blind holes, choose a spiral flute tap with a modified bottoming chamfer, like this OSG 9/16"-18 UNF tap. The spiral flutes push chips upward, preventing packing at the hole bottom. Ensure the tap's thread class (e.g., H3 / 2B-3B) matches your required fit tolerance for consistent thread quality.

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 general purpose spiral-flute taps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
OSG Spiral Flute Tap: 9/16"-12 UNC, H3 / 2B-3B, 4 Flute, Modified Bottoming Chamfer (MPN 2948601)
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OSG Spiral Flute Tap: 9/16"-12 UNC, H3 / 2B-3B, 4 Flute, Modified Bottoming Chamfer (MPN 2948601)
OSG Spiral Flute Tap: 9/16"-12 UNC, H3 / 2B-3B, 4 Flute, Modified Bottoming Chamfer (MPN 2948600)
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OSG Spiral Flute Tap: 9/16"-12 UNC, H3 / 2B-3B, 4 Flute, Modified Bottoming Chamfer (MPN 2948600)
OSG Spiral Flute Tap: 7/16"-14 UNC, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2932000)
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OSG Spiral Flute Tap: 7/16"-14 UNC, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2932000)
OSG Spiral Flute Tap: 5/16"-18 UNC, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2930800)
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OSG Spiral Flute Tap: 5/16"-18 UNC, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2930800)
OSG Spiral Flute Tap: 5/16"-18 UNC, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2930801)
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OSG Spiral Flute Tap: 5/16"-18 UNC, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2930801)
OSG Spiral Flute Tap: 5/16"-24 UNF, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2931201)
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OSG Spiral Flute Tap: 5/16"-24 UNF, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2931201)

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