EXW Singapore — collect or forward from our Singapore office.

3G Electric
OSG 9/16"-12 UNC Spiral-Flute Tap - Spiral-Flute Taps for Steel & Stainless Steel
OSGSpiral-Flute Taps for Steel & Stainless Steel

OSG 9/16"-12 UNC Spiral-Flute Tap

The OSG Spiral Flute Tap (9/16"-12 UNC, MPN 1645096123) is a 3-flute, modified bottoming chamfer tap with H3 / 2B-3B tolerance, designed for threading steel and stainless steel. 3G Electric interprets your demand for…

SKU 3G-OTH-218601

Brand
OSG
Item
9/16"-12 UNC Spiral-Flute Tap
Part Number
1645096123
Category
Spiral-Flute Taps for Steel & Stainless Steel
Available to Order
Also known as:1645096123OSG
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.
EXW Singapore
Collect or forward from our office
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

OSG
Manufacturer Part Number
1645096123
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 1645096123) is a 3-flute, modified bottoming chamfer tap with H3 / 2B-3B tolerance, designed for threading steel and stainless steel. 3G Electric interprets your demand for this specific OEM tool, sources it across our 14 industrial departments, and supports your application with specialist expertise in controls and pumps.

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. The spiral flute design evacuates chips upward, preventing clogging. The modified bottoming chamfer allows threading close to the bottom of the hole, making it ideal for production tapping in automotive, aerospace, and general manufacturing.

What are the specifications of the OSG 1645096123 tap?

The OSG 1645096123 is a 9/16"-12 UNC spiral flute tap with 3 flutes and a modified bottoming chamfer. It has an H3 / 2B-3B tolerance class, meaning it produces threads within a 2B (internal) to 3B (external) fit range. It is designed for threading steel and stainless steel in blind hole applications.

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 location. Contact us for availability and lead time on the OSG 1645096123 spiral flute tap. We source and deliver genuine OSG tooling to support your production needs.

How to select the right OSG tap for blind holes?

For blind holes in steel or stainless steel, choose a spiral flute tap like this OSG model. The spiral flutes pull chips out of the hole, preventing breakage. Ensure the chamfer type matches your thread depth requirement: a modified bottoming chamfer allows threading close to the hole bottom. Always match the tap tolerance (H3) to your desired thread class (2B-3B).

Used in

Common applications for OSG
Aerospace — OSG STI taps for installing helical wire thread inserts in aluminum components
Automotive — OSG spiral-point taps for through-hole threading in engine blocks and transmission cases
General machining — OSG spiral-flute taps for blind-hole threading in steel and stainless steel parts
Heavy equipment repair — OSG thread-forming taps for creating threads in ductile iron and steel castings
Precision manufacturing — OSG solid carbide chucking reamers for finishing holes in hydraulic manifolds
Die and mold — OSG coolant-through solid carbide drills for deep-hole drilling in tool steels
Not sure this is the right part? Photo-identify it→

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

More from OSG

View all OSG parts →
OSG Spiral Flute Tap: M36x1.5 Metric, D8 / 4H-6H, 4 Flute, Modified Bottoming Chamfer (MPN 1650008108)
OSG
OSG Spiral Flute Tap: M36x1.5 Metric, D8 / 4H-6H, 4 Flute, Modified Bottoming Chamfer (MPN 1650008108)
Spiral-flute tap for threading blind holes in steel and stainless steel. Features 3 flutes, H4 tolerance for 2B-3B thread classes, and a modified bottoming chamfer for threading close to hole bottoms. Part number 1722908
OSG
Spiral-flute tap for threading blind holes in steel and stainless steel. Features 3 flutes, H4 tolerance for 2B-3B thread classes, and a modified bottoming chamfer for threading close to hole bottoms. Part number 1722908
Spiral-flute tap for threading blind holes in steel and stainless steel. M8x1.25 metric thread, D5 / 4H-6H tolerance, 3 flutes, modified bottoming chamfer. Chip evacuation upward prevents clogging, allowing threading close to hole bottom
OSG
Spiral-flute tap for threading blind holes in steel and stainless steel. M8x1.25 metric thread, D5 / 4H-6H tolerance, 3 flutes, modified bottoming chamfer. Chip evacuation upward prevents clogging, allowing threading close to hole bottom
Spiral-flute tap for threading blind holes in steel and stainless steel. #10-24 UNC thread size, H5 tolerance, 2B-3B class, modified bottoming chamfer, 3 flutes. Lifts chips upward to prevent clogging in deep or blind holes
OSG
Spiral-flute tap for threading blind holes in steel and stainless steel. #10-24 UNC thread size, H5 tolerance, 2B-3B class, modified bottoming chamfer, 3 flutes. Lifts chips upward to prevent clogging in deep or blind holes
Spiral-flute tap for threading blind holes in steel and stainless steel. M12x1.75 metric thread, D6 / 4H-6H tolerance class, 3 flutes, modified bottoming chamfer. The spiral flute design lifts chips upward, preventing clogging in deep or blind holes. Suitable for automotive, aerospace, and general manufacturing applications requiring precise metric threads
OSG
Spiral-flute tap for threading blind holes in steel and stainless steel. M12x1.75 metric thread, D6 / 4H-6H tolerance class, 3 flutes, modified bottoming chamfer. The spiral flute design lifts chips upward, preventing clogging in deep or blind holes. Suitable for automotive, aerospace, and general manufacturing applications requiring precise metric threads
This OSG spiral-flute tap is designed for threading blind holes in steel and stainless steel. The spiral flute lifts chips upward, preventing clogging in deep or blind holes. It features a 1/2"-20 UNF thread size, H3 / 2B-3B tolerance, 3 flutes, and a modified bottoming chamfer. Suitable for general manufacturing applications requiring precise UNF threads
OSG
This OSG spiral-flute tap is designed for threading blind holes in steel and stainless steel. The spiral flute lifts chips upward, preventing clogging in deep or blind holes. It features a 1/2"-20 UNF thread size, H3 / 2B-3B tolerance, 3 flutes, and a modified bottoming chamfer. Suitable for general manufacturing applications requiring precise UNF threads
Spiral-flute tap for threading blind holes in steel and stainless steel. 3/8"-24 UNF thread, H4 / 2B-3B tolerance, bottoming chamfer, 3 flutes. V coated powdered metal construction. Chips evacuate upward, preventing clogging in blind-hole applications
OSG
Spiral-flute tap for threading blind holes in steel and stainless steel. 3/8"-24 UNF thread, H4 / 2B-3B tolerance, bottoming chamfer, 3 flutes. V coated powdered metal construction. Chips evacuate upward, preventing clogging in blind-hole applications
Spiral-flute tap for threading steel and stainless steel. Thread size 15/16"-20 UNEF with H5 tolerance for 2B-3B class fit. Features 4 flutes and a modified bottoming chamfer for chip evacuation in blind-hole applications
OSG
Spiral-flute tap for threading steel and stainless steel. Thread size 15/16"-20 UNEF with H5 tolerance for 2B-3B class fit. Features 4 flutes and a modified bottoming chamfer for chip evacuation in blind-hole applications

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first