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CHICAGO-LATROBE Extension Tap: 1/2"-13 UNC, H11, 3 Flute, Plug Chamfer - Spiral-Point Extension Taps
CHICAGO-LATROBESpiral-Point Extension Taps

CHICAGO-LATROBE Extension Tap: 1/2"-13 UNC, H11, 3 Flute, Plug Chamfer

The CHICAGO-LATROBE Extension Tap is a 1/2"-13 UNC spiral-point extension tap, type H11 with a plug chamfer, made from black oxide high speed steel. It features 3 flutes and is identified by manufacturer part number…

SKU 3G-OTH-313578

Brand
CHICAGO-LATROBE
Item
Extension Tap: 1/2"-13 UNC, H11, 3 Flute, Plug Chamfer
Category
Spiral-Point Extension Taps
Available to Order
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Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

CHICAGO-LATROBE
Manufacturer Part Number
313603
Type
H11, Plug Chamfer, Black Oxide High Speed Steel
Flute
3

Technical Documents

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CHICAGO-LATROBE Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The CHICAGO-LATROBE Extension Tap is a 1/2"-13 UNC spiral-point extension tap, type H11 with a plug chamfer, made from black oxide high speed steel. It features 3 flutes and is identified by manufacturer part number 313603.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the CHICAGO-LATROBE Extension Tap used for?

The CHICAGO-LATROBE Extension Tap is used for threading blind or through holes in metal, especially where standard taps cannot reach. Its extended length allows access to recessed areas in automotive, aerospace, and general manufacturing applications. The plug chamfer and spiral-point design help push chips forward, reducing clogging.

What are the specifications of the CHICAGO-LATROBE Extension Tap?

This extension tap has a 1/2"-13 UNC thread size, H11 tolerance, 3 flutes, and a plug chamfer. It is made from black oxide high-speed steel for wear resistance and reduced friction. The manufacturer part number is 313603, and the SKU is 3G-OTH-313578. It is designed for threading in steel and other ferrous materials.

Where to buy CHICAGO-LATROBE Extension Tap in worldwide?

You can source the CHICAGO-LATROBE Extension Tap through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time. We supply genuine CHICAGO-LATROBE tooling for industrial maintenance and production needs.

How to select the right CHICAGO-LATROBE Extension Tap?

Select the tap based on thread size, material, and hole depth. For 1/2"-13 UNC threads in steel, this H11 plug-chamfer tap is suitable. Ensure the tap drill size matches the hole before threading. Use cutting fluid to extend tool life. For deeper or blind holes, the spiral-point design helps evacuate chips effectively.

Used in

Common applications for CHICAGO-LATROBE
Aerospace assembly — Chicago-Latrobe NAS 907 Type B aircraft-extension drill bits for drilling fastener holes in aluminum and titanium skins.
Metal fabrication — Chicago-Latrobe reduced-shank drill bit sets for enlarging holes in structural steel using magnetic drill presses.
Maintenance repair — Chicago-Latrobe left-hand cobalt jobber-length drill bits for removing broken bolts in machinery.
Tool and die making — Chicago-Latrobe jobber-length drill bit sets with 135° split point for precision hole drilling in hardened steels.
Automotive repair — Chicago-Latrobe spiral-flute screw extractors for removing seized fasteners in engine blocks or exhaust systems.
General manufacturing — Chicago-Latrobe HSS jobber-length drill bits for production drilling in mild steel and cast iron.

CHICAGO-LATROBE Products

3G Electric supplies CHICAGO-LATROBE 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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Compatible alternatives & equivalents

Cross-referenced by specification & description
CHICAGO-LATROBE Extension Tap: 5/8"-11 UNC, H11, 3 Flute, Plug Chamfer, Black Oxide High Speed Steel (MPN 313604)
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CHICAGO-LATROBE Extension Tap: 1/4"-20 UNC, H11, 3 Flute, Plug Chamfer, High Speed Steel (MPN 313544)
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CHICAGO-LATROBE Extension Tap: 3/8"-16 UNC, H11, 3 Flute, Plug Chamfer, High Speed Steel (MPN 313546)
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CHICAGO-LATROBE Extension Tap: 5/16"-18 UNC, H11, 3 Flute, Plug Chamfer, High Speed Steel (MPN 313545)

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