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OSG 1"-8 UNC Spiral-Flute Extension Tap - Spiral-Flute Extension Taps for Multiple Materials
OSGSpiral-Flute Extension Taps for Multiple Materials

OSG 1"-8 UNC Spiral-Flute Extension Tap

OSG Spiral-Flute Extension Taps for Multiple Materials.

SKU 3G-OTH-311755

Brand
OSG
Item
1"-8 UNC Spiral-Flute Extension Tap
Category
Spiral-Flute Extension Taps for Multiple Materials
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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
1652505308

Technical Documents

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

Product Description

OSG Spiral-Flute Extension Taps for Multiple Materials.

Frequently Asked Questions

What is the OSG Extension Tap 1"-8 UNC used for?

The OSG Extension Tap is used for threading holes in multiple materials, including steel, stainless steel, and aluminum. Its spiral-flute design evacuates chips upward, making it ideal for blind-hole threading. The modified bottoming chamfer allows threading close to the bottom of the hole, while the H6 / 2B-3B tolerance ensures precise fit for UNC fasteners.

What are the specifications of the OSG Extension Tap MPN 1652505308?

The OSG Extension Tap MPN 1652505308 has a 1"-8 UNC thread size, H6 / 2B-3B tolerance class, 4 flutes, and a modified bottoming chamfer. It is a spiral-flute extension tap designed for multiple materials. The H6 tolerance ensures high precision for thread fit, suitable for both 2B and 3B classes.

Where to buy the OSG Extension Tap 1"-8 UNC worldwide?

You can source the OSG Extension Tap 1"-8 UNC 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. We supply genuine OSG taps for industrial threading applications.

How to select the correct OSG extension tap for threading?

To select the correct OSG extension tap, match the thread size (e.g., 1"-8 UNC) and tolerance class (H6 / 2B-3B) to your application. Consider material type: spiral-flute taps work well for blind holes in steel or aluminum. Ensure the tap length provides sufficient reach. Consult OSG's technical data for optimal speeds and feeds.

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 extension taps for multiple materials. 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
This spiral-flute STI tap is designed for cutting internal threads for helical wire thread inserts in multiple materials. The spiral-flute geometry aids chip evacuation in blind-hole applications. Thread size is 1"-8 UNC with H6 / 2B-3B tolerance, and the tap has 4 flutes
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This spiral-flute STI tap is designed for cutting internal threads for helical wire thread inserts in multiple materials. The spiral-flute geometry aids chip evacuation in blind-hole applications. Thread size is 1"-8 UNC with H6 / 2B-3B tolerance, and the tap has 4 flutes
This spiral-flute STI tap is designed for cutting internal threads in multiple materials to accept helical wire thread inserts. With a #8-36 UNF thread size, H2 / 2B-3B tolerance, and 3 flutes, it is suitable for applications requiring thread repair or reinforcement in materials such as aluminum, steel, and cast iron
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This spiral-flute STI tap is designed for cutting internal threads in multiple materials to accept helical wire thread inserts. With a #8-36 UNF thread size, H2 / 2B-3B tolerance, and 3 flutes, it is suitable for applications requiring thread repair or reinforcement in materials such as aluminum, steel, and cast iron
This OSG spiral-flute STI tap cuts internal threads in multiple materials to accept helical wire thread inserts. It features a #8-32 UNC thread size, H2 / 2B-3B tolerance, and a 3-flute design. Commonly used in aerospace, automotive, and general manufacturing for repairing or reinforcing tapped holes in aluminum, steel, and cast iron
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This OSG spiral-flute STI tap cuts internal threads in multiple materials to accept helical wire thread inserts. It features a #8-32 UNC thread size, H2 / 2B-3B tolerance, and a 3-flute design. Commonly used in aerospace, automotive, and general manufacturing for repairing or reinforcing tapped holes in aluminum, steel, and cast iron
Spiral-flute STI tap for cutting internal threads in multiple materials prior to installing helical wire thread inserts. Features #8-36 UNF thread size, H2 / 2B-3B tolerance, and 3-flute design. Used in general manufacturing for thread repair or reinforcement
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Spiral-flute STI tap for cutting internal threads in multiple materials prior to installing helical wire thread inserts. Features #8-36 UNF thread size, H2 / 2B-3B tolerance, and 3-flute design. Used in general manufacturing for thread repair or reinforcement
This spiral-flute STI tap is designed for cutting internal threads in multiple materials to accept screw thread inserts. It features a #8-32 UNC thread size, H2 / 2B-3B tolerance, and a 3-flute design. Suitable for applications requiring strong threads in metals and plastics
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This spiral-flute STI tap is designed for cutting internal threads in multiple materials to accept screw thread inserts. It features a #8-32 UNC thread size, H2 / 2B-3B tolerance, and a 3-flute design. Suitable for applications requiring strong threads in metals and plastics
Spiral-flute STI tap for cutting internal threads in multiple materials to accept screw thread inserts. Features a 1"-8 UNC thread size, H4 / 2B-3B tolerance, and 4-flute design. Suitable for general manufacturing, automotive, and aerospace applications requiring thread repair or reinforcement
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Spiral-flute STI tap for cutting internal threads in multiple materials to accept screw thread inserts. Features a 1"-8 UNC thread size, H4 / 2B-3B tolerance, and 4-flute design. Suitable for general manufacturing, automotive, and aerospace applications requiring thread repair or reinforcement

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This spiral-flute extension tap is designed for cutting internal threads in hard-to-reach or deep-hole applications. With a 1"-12 UNF thread size, H6 / 2B-3B tolerance, 4 flutes, and a modified bottoming chamfer, it is suitable for through-hole and blind-hole threading in multiple materials. Commonly used in industrial machining, automotive, and aerospace maintenance operations
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This spiral-flute extension tap is designed for cutting internal threads in hard-to-reach or deep-hole applications. With a 1"-12 UNF thread size, H6 / 2B-3B tolerance, 4 flutes, and a modified bottoming chamfer, it is suitable for through-hole and blind-hole threading in multiple materials. Commonly used in industrial machining, automotive, and aerospace maintenance operations
This spiral-flute extension tap from OSG is designed for threading hard-to-reach holes in multiple materials. With a 7/16"-20 UNF thread size, H5 tolerance for 2B-3B class fit, and 3 flutes, it features a modified bottoming chamfer. The extended reach allows tapping deep or obstructed locations, while the spiral-flute design aids chip evacuation in through-hole and blind-hole tapping
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This spiral-flute extension tap from OSG is designed for threading hard-to-reach holes in multiple materials. With a 7/16"-20 UNF thread size, H5 tolerance for 2B-3B class fit, and 3 flutes, it features a modified bottoming chamfer. The extended reach allows tapping deep or obstructed locations, while the spiral-flute design aids chip evacuation in through-hole and blind-hole tapping
OSG Extension Tap: M4.5x0.75 Metric, D4 / 6H, 3 Flute, Modified Bottoming Chamfer (MPN 1652001908)
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OSG Extension Tap: M4.5x0.75 Metric, D4 / 6H, 3 Flute, Modified Bottoming Chamfer (MPN 1652001908)
Spiral-flute extension tap for threading blind or deep holes in multiple materials. The spiral-flute design evacuates chips upward, and the modified bottoming chamfer allows threading close to the hole bottom. Thread size #12-28 UNF, tolerance class H3 / 2B-3B, 2-flute design
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Spiral-flute extension tap for threading blind or deep holes in multiple materials. The spiral-flute design evacuates chips upward, and the modified bottoming chamfer allows threading close to the hole bottom. Thread size #12-28 UNF, tolerance class H3 / 2B-3B, 2-flute design
This OSG spiral-flute extension tap is designed for threading multiple materials in hard-to-reach or deep-hole applications. With a M20x1.5 metric thread, D6 / 4H-6H tolerance, 4 flutes, and a modified bottoming chamfer, it enables threading close to the bottom of blind holes. The spiral-flute geometry facilitates efficient chip evacuation during operation
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This OSG spiral-flute extension tap is designed for threading multiple materials in hard-to-reach or deep-hole applications. With a M20x1.5 metric thread, D6 / 4H-6H tolerance, 4 flutes, and a modified bottoming chamfer, it enables threading close to the bottom of blind holes. The spiral-flute geometry facilitates efficient chip evacuation during operation
This spiral-flute extension tap is designed for threading blind or deep holes where standard taps cannot reach. The 1/4"-20 UNC thread with H5 tolerance provides a 2B-3B class fit. The 2-flute design and modified bottoming chamfer facilitate chip evacuation upward, suitable for production threading in steel, stainless steel, and aluminum
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This spiral-flute extension tap is designed for threading blind or deep holes where standard taps cannot reach. The 1/4"-20 UNC thread with H5 tolerance provides a 2B-3B class fit. The 2-flute design and modified bottoming chamfer facilitate chip evacuation upward, suitable for production threading in steel, stainless steel, and aluminum