We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

OSG Spiral Flute Tap: 9/16"-12 UNC, H3 / 2B-3B, 3 Flute - Spiral-Flute Taps for Steel & Stainless Steel
OSGSpiral-Flute Taps for Steel & Stainless Steel

OSG Spiral Flute Tap: 9/16"-12 UNC, H3 / 2B-3B, 3 Flute

The OSG Spiral Flute Tap (9/16"-12 UNC, MPN 1749905) is a spiral-flute tap for steel and stainless steel, featuring an H3 / 2B-3B tolerance, 3 flutes, and a modified bottoming chamfer. 3G Electric interprets this…

SKU 3G-OTH-218021

Brand
OSG
Item
Spiral Flute Tap: 9/16"-12 UNC, H3 / 2B-3B, 3 Flute
Category
Spiral-Flute Taps for Steel & Stainless Steel
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

OSG
Manufacturer Part Number
1749905
Type
H3 / 2B-3B, Modified Bottoming Chamfer
Flute
3

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

The OSG Spiral Flute Tap (9/16"-12 UNC, MPN 1749905) is a spiral-flute tap for steel and stainless steel, featuring an H3 / 2B-3B tolerance, 3 flutes, and a modified bottoming chamfer. 3G Electric interprets this demand and sources the genuine OSG product, supporting your operation across 14 industrial departments with specialist depth in cutting tools.

Frequently Asked Questions

What is the OSG spiral flute tap 9/16"-12 UNC used for?

This OSG spiral flute tap is designed for threading blind holes in steel and stainless steel. Its modified bottoming chamfer and 3-flute design efficiently evacuate chips upward, making it ideal for automotive, aerospace, and general manufacturing applications requiring precise internal threads.

What are the specifications of the OSG 1749905 tap?

The OSG 1749905 is a 9/16"-12 UNC spiral flute tap with an H3 / 2B-3B tolerance class. It features 3 flutes and a modified bottoming chamfer. This tap is engineered for threading steel and stainless steel, providing reliable chip evacuation and thread accuracy.

Where to buy OSG taps in worldwide?

3G Electric supplies OSG taps like the 1749905 to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this spiral flute tap for steel and stainless steel.

How to select the right spiral flute tap for steel?

For steel and stainless steel, choose a spiral flute tap with a modified bottoming chamfer like the OSG 1749905. Ensure the thread size (9/16"-12 UNC) and tolerance class (H3 / 2B-3B) match your application. Use proper cutting fluid and machine speed to extend tool life and achieve clean threads.

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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
OSG Spiral Flute Tap: 9/16"-12 UNC, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1749908)
OSG
OSG Spiral Flute Tap: 9/16"-12 UNC, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1749908)
OSG Spiral Flute Tap: 9/16"-12 UNC, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1749901)
OSG
OSG Spiral Flute Tap: 9/16"-12 UNC, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1749901)
OSG Spiral Flute Tap: 9/16"-18 UNF, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1762308)
OSG
OSG Spiral Flute Tap: 9/16"-18 UNF, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1762308)
OSG Spiral Flute Tap: 9/16"-18 UNF, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1762305)
OSG
OSG Spiral Flute Tap: 9/16"-18 UNF, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1762305)
OSG Spiral Flute Tap: 5/8"-11 UNC, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1749101)
OSG
OSG Spiral Flute Tap: 5/8"-11 UNC, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1749101)
OSG Spiral Flute Tap: 9/16"-18 UNF, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1762301)
OSG
OSG Spiral Flute Tap: 9/16"-18 UNF, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1762301)

More from OSG

View all OSG parts
OSG Spiral Flute Tap: 1/2"-20 UNF, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1733501)
OSG
OSG Spiral Flute Tap: 1/2"-20 UNF, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1733501)
OSG Spiral Flute Tap: #4-40 UNC, H2 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 0135601)
OSG
OSG Spiral Flute Tap: #4-40 UNC, H2 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 0135601)
OSG Spiral Flute Tap: 7/8"-14 UNF, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 0140008)
OSG
OSG Spiral Flute Tap: 7/8"-14 UNF, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 0140008)
OSG Spiral Flute Tap: #2-56 UNC, H2 / 2B-3B, 2 Flute, Modified Bottoming Chamfer (MPN 1754008)
OSG
OSG Spiral Flute Tap: #2-56 UNC, H2 / 2B-3B, 2 Flute, Modified Bottoming Chamfer (MPN 1754008)
OSG Spiral Flute Tap: 11/16"-24 UNEF, H4 / 2B-3B, 4 Flute, Modified Bottoming Chamfer (MPN 1650506408)
OSG
OSG Spiral Flute Tap: 11/16"-24 UNEF, H4 / 2B-3B, 4 Flute, Modified Bottoming Chamfer (MPN 1650506408)
OSG Spiral Flute Tap: M14x1.5 Metric, D6 / 4H-6H, 3 Flute, Modified Bottoming Chamfer (MPN 1745901)
OSG
OSG Spiral Flute Tap: M14x1.5 Metric, D6 / 4H-6H, 3 Flute, Modified Bottoming Chamfer (MPN 1745901)
OSG Spiral Flute Tap: #12-28 UNF, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1749801)
OSG
OSG Spiral Flute Tap: #12-28 UNF, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1749801)
OSG Spiral Flute Tap: #3-48 UNC, H2 / 2B-3B, 2 Flute, Modified Bottoming Chamfer (MPN 1748701)
OSG
OSG Spiral Flute Tap: #3-48 UNC, H2 / 2B-3B, 2 Flute, Modified Bottoming Chamfer (MPN 1748701)