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OSG Extension Tap: 5/16"-18 UNC, H3 / 2B-3B, 3 Flute, Plug Chamfer - Spiral-Point Extension Taps
OSGSpiral-Point Extension Taps

OSG Extension Tap: 5/16"-18 UNC, H3 / 2B-3B, 3 Flute, Plug Chamfer

The OSG Extension Tap (SKU 54LK83) is a 5/16"-18 UNC spiral-point extension tap, type H3 / 2B-3B with a plug chamfer, made from black oxide high speed steel and featuring 3 flutes (MPN 1293701). 3G Electric…

SKU 3G-OTH-313564

Brand
OSG
Item
Extension Tap: 5/16"-18 UNC, H3 / 2B-3B, 3 Flute, Plug Chamfer
Category
Spiral-Point Extension Taps
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Technical Specifications

OSG
Manufacturer Part Number
1293701
Type
H3 / 2B-3B, Plug Chamfer, Black Oxide High Speed Steel
Flute
3
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The OSG Extension Tap (SKU 54LK83) is a 5/16"-18 UNC spiral-point extension tap, type H3 / 2B-3B with a plug chamfer, made from black oxide high speed steel and featuring 3 flutes (MPN 1293701). 3G Electric interprets your demand for this specific threading tool and sources it from our global network, backed by specialist expertise across 14 industrial departments.

Frequently Asked Questions

What is the OSG Extension Tap 5/16"-18 UNC used for?

The OSG Extension Tap is used for threading blind or deep holes in metalworking applications. Its extended length allows access to recessed areas where standard taps cannot reach. It is commonly used in automotive, aerospace, and general manufacturing for creating internal threads in steel and other materials.

What are the specifications of the OSG Extension Tap MPN 1293701?

The OSG Extension Tap has a 5/16"-18 UNC thread size, H3 / 2B-3B tolerance, 3 flutes, and a plug chamfer. It is made from black oxide high-speed steel. The tap is designed for spiral-point geometry to push chips forward, making it suitable for through-hole or deep-hole threading.

Where to buy the OSG Extension Tap 5/16"-18 UNC worldwide?

You can source the OSG Extension Tap MPN 1293701 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 manufacturing and maintenance needs.

How to select the correct OSG Extension Tap for a job?

To select the correct OSG Extension Tap, match the thread size (e.g., 5/16"-18 UNC), tolerance class (H3 / 2B-3B), and chamfer type (plug) to your application. Consider material hardness and hole depth; black oxide high-speed steel suits general-purpose threading. For extended reach, verify the tap's overall length meets your clearance requirements.

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

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