Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

OSG Spiral Flute Tap: 1/4"-20 UNC, H3 / 2B-3B, 2 Flute - Spiral-Flute Taps for Steel & Stainless Steel
OSGSpiral-Flute Taps for Steel & Stainless Steel

OSG Spiral Flute Tap: 1/4"-20 UNC, H3 / 2B-3B, 2 Flute

The OSG Spiral Flute Tap (1/4"-20 UNC, MPN 1650501708) is a 2-flute tap with an H3 / 2B-3B tolerance and a modified bottoming chamfer, designed for threading steel and stainless steel. 3G Electric interprets your…

SKU 3G-OTH-217808

Brand
OSG
Item
Spiral Flute Tap: 1/4"-20 UNC, H3 / 2B-3B, 2 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 — 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
1650501708
Type
H3 / 2B-3B, Modified Bottoming Chamfer
Flute
2

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 (1/4"-20 UNC, MPN 1650501708) is a 2-flute tap with an H3 / 2B-3B tolerance and a modified bottoming chamfer, designed for threading steel and stainless steel. 3G Electric interprets your demand for this specific OEM tool, sourcing it across our 14 industrial departments with specialist depth in cutting tools and controls.

Frequently Asked Questions

What is the OSG spiral flute tap 1/4-20 UNC 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. It is commonly used in automotive, aerospace, and general manufacturing applications where clean, accurate threads are required.

What are the specifications of the OSG 1/4-20 UNC spiral flute tap?

This OSG tap has a 1/4-20 UNC thread size, H3 / 2B-3B tolerance, 2 flutes, and a modified bottoming chamfer. The manufacturer part number is 1650501708. It is designed for threading steel and stainless steel, with a spiral flute geometry for chip evacuation in blind holes.

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 this OSG spiral flute tap or other cutting tools.

How to select the right OSG tap for steel?

For steel and stainless steel, choose a spiral flute tap like this OSG model for blind holes. The H3 / 2B-3B tolerance ensures precise thread fit. Consider thread size (1/4-20 UNC), flute count (2), and chamfer type (modified bottoming). Always match the tap to material hardness and hole depth.

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: 5/16"-18 UNC, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1650502108)
OSG
OSG Spiral Flute Tap: 5/16"-18 UNC, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1650502108)
OSG Spiral Flute Tap: 5/16"-24 UNF, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1650502308)
OSG
OSG Spiral Flute Tap: 5/16"-24 UNF, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1650502308)
OSG Spiral Flute Tap: 3/8"-24 UNF, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1650502708)
OSG
OSG Spiral Flute Tap: 3/8"-24 UNF, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1650502708)
OSG Spiral Flute Tap: 3/8"-16 UNC, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1650502508)
OSG
OSG Spiral Flute Tap: 3/8"-16 UNC, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1650502508)
OSG Spiral Flute Tap: 7/16"-14 UNC, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1650502908)
OSG
OSG Spiral Flute Tap: 7/16"-14 UNC, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1650502908)
OSG Spiral Flute Tap: 5/16"-24 UNF, H4 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1650502208)
OSG
OSG Spiral Flute Tap: 5/16"-24 UNF, H4 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1650502208)

More from OSG

View all OSG parts
Spiral-flute tap for threading blind holes in steel and stainless steel. Metric size M3.5x0.6 with D3 / 4H-6H tolerance class. 3-flute design with modified bottoming chamfer for threading close to hole bottom. Chip evacuation upward prevents clogging
OSG
Spiral-flute tap for threading blind holes in steel and stainless steel. Metric size M3.5x0.6 with D3 / 4H-6H tolerance class. 3-flute design with modified bottoming chamfer for threading close to hole bottom. Chip evacuation upward prevents clogging
Spiral-flute tap designed for threading blind holes in steel and stainless steel. Features a modified bottoming chamfer and 3 flutes to lift chips upward, preventing clogging in deep holes. Tolerance H3 / 2B-3B ensures precise thread fit. Suitable for general manufacturing applications requiring clean, accurate threads
OSG
Spiral-flute tap designed for threading blind holes in steel and stainless steel. Features a modified bottoming chamfer and 3 flutes to lift chips upward, preventing clogging in deep holes. Tolerance H3 / 2B-3B ensures precise thread fit. Suitable for general manufacturing applications requiring clean, accurate threads
Spiral-flute tap for threading blind holes in steel and stainless steel. Features a modified bottoming chamfer and 2-flute design to lift chips upward, preventing clogging in deep or blind holes. Thread tolerance H3 / 2B-3B. Manufacturer part number 1645010243
OSG
Spiral-flute tap for threading blind holes in steel and stainless steel. Features a modified bottoming chamfer and 2-flute design to lift chips upward, preventing clogging in deep or blind holes. Thread tolerance H3 / 2B-3B. Manufacturer part number 1645010243
Spiral-flute tap with 3 flutes and modified bottoming chamfer, tolerance class H3 / 2B-3B. Designed for threading blind holes in steel and stainless steel, the spiral flute lifts chips upward to prevent clogging. Suitable for general manufacturing applications requiring precise UNF threads
OSG
Spiral-flute tap with 3 flutes and modified bottoming chamfer, tolerance class H3 / 2B-3B. Designed for threading blind holes in steel and stainless steel, the spiral flute lifts chips upward to prevent clogging. Suitable for general manufacturing applications requiring precise UNF threads
Spiral-flute tap for threading steel and stainless steel. The spiral flute design pushes chips forward, making it suitable for through-hole applications. The bottoming chamfer allows threading close to the bottom of a blind hole. Thread size #2-56 UNC with H2 tolerance for class 2B-3B fit
OSG
Spiral-flute tap for threading steel and stainless steel. The spiral flute design pushes chips forward, making it suitable for through-hole applications. The bottoming chamfer allows threading close to the bottom of a blind hole. Thread size #2-56 UNC with H2 tolerance for class 2B-3B fit
Spiral-flute tap for threading blind holes in steel and stainless steel. The spiral flute design evacuates chips upward, preventing clogging in deep or blind applications. Features a modified bottoming chamfer for threading close to the bottom of the hole. Tolerance class H4 ensures precise thread fit for 2B-3B classes
OSG
Spiral-flute tap for threading blind holes in steel and stainless steel. The spiral flute design evacuates chips upward, preventing clogging in deep or blind applications. Features a modified bottoming chamfer for threading close to the bottom of the hole. Tolerance class H4 ensures precise thread fit for 2B-3B classes
Spiral-flute tap for threading blind holes in steel and stainless steel. Features a modified bottoming chamfer and 3 flutes to lift chips upward, preventing clogging in deep holes. Tolerance class H3 / 2B-3B. Thread size 9/16"-12 UNC
OSG
Spiral-flute tap for threading blind holes in steel and stainless steel. Features a modified bottoming chamfer and 3 flutes to lift chips upward, preventing clogging in deep holes. Tolerance class H3 / 2B-3B. Thread size 9/16"-12 UNC
Spiral-flute tap for threading blind holes in steel and stainless steel. The spiral flute design lifts chips upward, preventing clogging in deep or blind holes. Features M4x0.7 metric thread, D4 / 4H-6H tolerance class, 3 flutes, and bottoming chamfer. Suitable for creating internal threads in ferrous materials
OSG
Spiral-flute tap for threading blind holes in steel and stainless steel. The spiral flute design lifts chips upward, preventing clogging in deep or blind holes. Features M4x0.7 metric thread, D4 / 4H-6H tolerance class, 3 flutes, and bottoming chamfer. Suitable for creating internal threads in ferrous materials