CHICAGO-LATROBEOversized Spiral-Flute Taps

CHICAGO-LATROBE Spiral Flute Tap: 1/4"-20 UNC, H11 / 1B, 3 Flute, Semi-Bottoming Chamfer (MPN 313580)

The CHICAGO-LATROBE Spiral Flute Tap (SKU 449T27, MPN 313580) is an oversized spiral-flute tap with a 1/4\"-20 UNC thread. It features a H11 / 1B tolerance, 3 flutes, and a semi-bottoming chamfer design.

SKU 3G-OTH-211247

Brand

CHICAGO-LATROBE

Item

Spiral Flute Tap: 1/4"-20 UNC, H11 / 1B, 3 Flute, Semi-Bottoming Chamfer

Technical Specifications

CHICAGO-LATROBE

Manufacturer Part Number

313580

Type

H11 / 1B, Semi-Bottoming Chamfer 

Flute

3

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Technical Documents

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CHICAGO-LATROBE Products

3G Electric (S) Pte. Ltd. — Singapore

Product Description

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 a CHICAGO-LATROBE spiral flute tap used for?

A CHICAGO-LATROBE spiral flute tap is used for threading blind holes in materials like steel and aluminum. The spiral flute design evacuates chips upward, preventing clogging and ensuring clean threads. It is ideal for production tapping where chip removal is critical.

What are the specifications of the CHICAGO-LATROBE 313580 tap?

The CHICAGO-LATROBE 313580 is a spiral flute tap with a 1/4\"-20 UNC thread, H11 / 1B tolerance, 3 flutes, and a semi-bottoming chamfer. It is an oversized tap designed for threading blind holes in industrial applications.

Where to buy CHICAGO-LATROBE taps in worldwide?

You can source CHICAGO-LATROBE taps 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 times.

How to select the right CHICAGO-LATROBE tap for blind holes?

For blind holes, choose a spiral flute tap like the CHICAGO-LATROBE 313580 to evacuate chips upward. Match the thread size (e.g., 1/4\"-20 UNC) and chamfer type (semi-bottoming for near-bottom threading). Ensure the tap tolerance (H11 / 1B) fits your application.

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

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