Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

CHICAGO-LATROBE Extension Tap: 5/8"-11 UNC, H11, 3 Flute, Plug Chamfer - Spiral-Point Extension Taps
CHICAGO-LATROBESpiral-Point Extension Taps

CHICAGO-LATROBE Extension Tap: 5/8"-11 UNC, H11, 3 Flute, Plug Chamfer

3G Electric supplies the CHICAGO-LATROBE Extension Tap (SKU 449T02), a 5/8"-11 UNC spiral-point extension tap with an H11, plug chamfer, black oxide high-speed steel construction and 3 flutes (MPN 313604). We…

SKU 3G-OTH-313645

Brand
CHICAGO-LATROBE
Item
Extension Tap: 5/8"-11 UNC, H11, 3 Flute, Plug Chamfer
Category
Spiral-Point Extension Taps
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

CHICAGO-LATROBE
Manufacturer Part Number
313604
Type
H11, Plug Chamfer, Black Oxide High Speed Steel
Flute
3
View Full Spec Sheet

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

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

Product Description

3G Electric supplies the CHICAGO-LATROBE Extension Tap (SKU 449T02), a 5/8"-11 UNC spiral-point extension tap with an H11, plug chamfer, black oxide high-speed steel construction and 3 flutes (MPN 313604). We interpret your threading needs, source this genuine OEM tool, and support your machining operations across 14 industrial departments — with specialist depth in combustion, pumps, and controls as an authorised distributor.

Frequently Asked Questions

What is the CHICAGO-LATROBE Extension Tap 5/8"-11 UNC used for?

This extension tap is used for threading blind or deep holes in metalworking applications. Its extended reach allows access to recessed areas where standard taps cannot reach, making it ideal for maintenance, repair, and production environments requiring UNC threads.

What are the specifications of the CHICAGO-LATROBE Extension Tap 5/8"-11 UNC?

This tap has a 5/8"-11 UNC thread size, H11 tolerance, 3 flutes, plug chamfer, and black oxide high-speed steel construction. The manufacturer part number is 313604. It is designed for threading blind holes with a spiral-point geometry that pushes chips forward.

Where to buy CHICAGO-LATROBE Extension Tap 5/8"-11 UNC worldwide?

You can source this CHICAGO-LATROBE extension tap from 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 on this item.

How to select the correct extension tap for threading applications?

Select an extension tap based on thread size (e.g., 5/8"-11 UNC), material compatibility (high-speed steel for general use), chamfer type (plug for blind holes), and flute count (3 flutes balance chip evacuation and strength). Ensure the tap's reach matches your hole depth.

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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Similar products

Matched by specification & description
CHICAGO-LATROBE Extension Tap: 1/4"-20 UNC, H11, 3 Flute, Plug Chamfer, Black Oxide High Speed Steel (MPN 313599)
CHICAGO-LATROBE
CHICAGO-LATROBE Extension Tap: 1/4"-20 UNC, H11, 3 Flute, Plug Chamfer, Black Oxide High Speed Steel (MPN 313599)
CHICAGO-LATROBE Extension Tap: 5/8"-11 UNC, H11, 3 Flute, Plug Chamfer, High Speed Steel (MPN 313549)
CHICAGO-LATROBE
CHICAGO-LATROBE Extension Tap: 5/8"-11 UNC, H11, 3 Flute, Plug Chamfer, High Speed Steel (MPN 313549)
CHICAGO-LATROBE Extension Tap: 5/16"-18 UNC, H11, 3 Flute, Plug Chamfer, High Speed Steel (MPN 313545)
CHICAGO-LATROBE
CHICAGO-LATROBE Extension Tap: 5/16"-18 UNC, H11, 3 Flute, Plug Chamfer, High Speed Steel (MPN 313545)
CHICAGO-LATROBE Extension Tap: 1/2"-13 UNC, H11, 3 Flute, Plug Chamfer, High Speed Steel (MPN 313548)
CHICAGO-LATROBE
CHICAGO-LATROBE Extension Tap: 1/2"-13 UNC, H11, 3 Flute, Plug Chamfer, High Speed Steel (MPN 313548)
CHICAGO-LATROBE Extension Tap: 1/4"-20 UNC, H11, 3 Flute, Plug Chamfer, High Speed Steel (MPN 313544)
CHICAGO-LATROBE
CHICAGO-LATROBE Extension Tap: 1/4"-20 UNC, H11, 3 Flute, Plug Chamfer, High Speed Steel (MPN 313544)
CHICAGO-LATROBE Extension Tap: M6x1 Metric, D11, 3 Flute, Plug Chamfer, Black Oxide High Speed Steel (MPN 313605)
CHICAGO-LATROBE
CHICAGO-LATROBE Extension Tap: M6x1 Metric, D11, 3 Flute, Plug Chamfer, Black Oxide High Speed Steel (MPN 313605)

More from CHICAGO-LATROBE

View all CHICAGO-LATROBE parts
CHICAGO-LATROBE Spiral Point Tap: #8-32 UNC, H3 / 2B, 2 Flute, Plug Chamfer, High Speed Steel (MPN 918932)
CHICAGO-LATROBE
CHICAGO-LATROBE Spiral Point Tap: #8-32 UNC, H3 / 2B, 2 Flute, Plug Chamfer, High Speed Steel (MPN 918932)
CHICAGO-LATROBE Extension Tap: M6x1 Metric, D11, 3 Flute, Plug Chamfer, High Speed Steel (MPN 313550)
CHICAGO-LATROBE
CHICAGO-LATROBE Extension Tap: M6x1 Metric, D11, 3 Flute, Plug Chamfer, High Speed Steel (MPN 313550)
CHICAGO-LATROBE Spiral Point Tap: 5/16"-18 UNC, H3 / 2B, 2 Flute, Plug Chamfer, High Speed Steel (MPN 918938)
CHICAGO-LATROBE
CHICAGO-LATROBE Spiral Point Tap: 5/16"-18 UNC, H3 / 2B, 2 Flute, Plug Chamfer, High Speed Steel (MPN 918938)
CHICAGO-LATROBE Extension Tap: 3/8"-16 UNC, H11, 3 Flute, Plug Chamfer, High Speed Steel (MPN 313546)
CHICAGO-LATROBE
CHICAGO-LATROBE Extension Tap: 3/8"-16 UNC, H11, 3 Flute, Plug Chamfer, High Speed Steel (MPN 313546)
CHICAGO-LATROBE Spiral Point Tap: 1/4"-20 UNC, H3 / 2B, 2 Flute, Plug Chamfer, High Speed Steel (MPN 918936)
CHICAGO-LATROBE
CHICAGO-LATROBE Spiral Point Tap: 1/4"-20 UNC, H3 / 2B, 2 Flute, Plug Chamfer, High Speed Steel (MPN 918936)
CHICAGO-LATROBE Extension Tap: 3/8"-16 UNC, H11, 3 Flute, Plug Chamfer, Black Oxide High Speed Steel (MPN 313601)
CHICAGO-LATROBE
CHICAGO-LATROBE Extension Tap: 3/8"-16 UNC, H11, 3 Flute, Plug Chamfer, Black Oxide High Speed Steel (MPN 313601)
CHICAGO-LATROBE Extension Tap: 1/2"-13 UNC, H11, 3 Flute, Plug Chamfer, Black Oxide High Speed Steel (MPN 313603)
CHICAGO-LATROBE
CHICAGO-LATROBE Extension Tap: 1/2"-13 UNC, H11, 3 Flute, Plug Chamfer, Black Oxide High Speed Steel (MPN 313603)
CHICAGO-LATROBE Spiral Point Tap: #10-24 UNC, H3 / 2B, 2 Flute, Plug Chamfer, High Speed Steel (MPN 918934)
CHICAGO-LATROBE
CHICAGO-LATROBE Spiral Point Tap: #10-24 UNC, H3 / 2B, 2 Flute, Plug Chamfer, High Speed Steel (MPN 918934)