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OSG Straight Flute Tap: 5/16"-18 UNC, H3 / 2B-3B, 3 Flute, Plug Chamfer - General Purpose Hand Taps
OSGGeneral Purpose Hand Taps

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

The OSG Straight Flute Tap (5/16"-18 UNC) is a general-purpose hand tap with a plug chamfer, 3 flutes, and TiN-coated high-speed steel construction. It is manufactured to H3 / 2B-3B tolerance specifications (MPN…

SKU 3G-OTH-221662

Brand
OSG
Item
Straight Flute Tap: 5/16"-18 UNC, H3 / 2B-3B, 3 Flute, Plug Chamfer
Category
General Purpose Hand Taps
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Local availability & support

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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
1170705
Type
H3 / 2B-3B, Plug Chamfer, TiN Coated High Speed Steel
Flute
3

Technical Documents

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

Product Description

The OSG Straight Flute Tap (5/16"-18 UNC) is a general-purpose hand tap with a plug chamfer, 3 flutes, and TiN-coated high-speed steel construction. It is manufactured to H3 / 2B-3B tolerance specifications (MPN 1170705). 3G Electric interprets your demand for this OEM threading tool, sources it across our 14 industrial departments, and provides specialist support to ensure you get the right solution.

Frequently Asked Questions

What is OSG Straight Flute Tap 5/16"-18 UNC used for?

This OSG tap is used for cutting internal threads in through or blind holes in a wide range of materials. Its TiN coating reduces friction and extends tool life, making it suitable for general-purpose tapping in machining, automotive, and industrial maintenance applications.

What are the specifications of OSG Straight Flute Tap 5/16"-18 UNC?

This OSG tap has a 5/16"-18 UNC thread, H3 / 2B-3B tolerance, 3 flutes, and a plug chamfer. It is made of TiN coated high speed steel. The manufacturer part number is 1170705. It is designed for general purpose hand tapping.

Where to buy OSG Straight Flute Tap 5/16"-18 UNC worldwide?

3G Electric supplies and delivers OSG taps worldwide. We handle full logistics and customs clearance to ensure your order arrives at your facility. Contact us for availability and lead time on this and other OSG cutting tools.

How to select the correct tap for a 5/16"-18 UNC thread?

Select a tap with the same thread size and pitch as your hole, such as this OSG 5/16"-18 UNC. Choose a plug chamfer for most blind holes. For harder materials, consider a TiN coated high speed steel tap like this one to improve wear resistance and thread quality.

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 general purpose hand taps. 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
OSG Straight Flute Tap: 5/16"-18 UNC, H3 / 2B-3B, 4 Flute, Plug Chamfer, TiN Coated High Speed Steel (MPN 1120705)
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OSG Straight Flute Tap: 7/16"-20 UNF, H3 / 2B-3B, 4 Flute, Plug Chamfer, TiN Coated High Speed Steel (MPN 1122205)
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OSG Straight Flute Tap: 7/8"-14 UNF, H4 / 2B-3B, 4 Flute, Plug Chamfer, TiN Coated High Speed Steel (MPN 1135805)
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OSG Straight Flute Tap: 1/2"-20 UNF, H3 / 2B-3B, 4 Flute, Plug Chamfer, TiN Coated High Speed Steel (MPN 1122805)

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