CHICAGO-LATROBEOversized Spiral-Point Taps

CHICAGO-LATROBE Spiral Point Tap: 3/4"-10 UNC, H11 / 1B, 4 Flute, Plug Chamfer

The CHICAGO-LATROBE Spiral Point Tap (SKU 449T57, MPN 313512) is an oversized spiral-point tap with a 3/4"-10 UNC thread size. It features an H11 / 1B tolerance, plug chamfer, 4 flutes, and is made of high-speed steel.

SKU 3G-OTH-251232

Brand

CHICAGO-LATROBE

Item

Spiral Point Tap: 3/4"-10 UNC, H11 / 1B, 4 Flute, Plug Chamfer

Technical Specifications

CHICAGO-LATROBE

Manufacturer Part Number

313512

Type

H11 / 1B, Plug Chamfer, High Speed Steel 

Flute

4

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Technical Documents

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CHICAGO-LATROBE Products

3G Electric (S) Pte. Ltd. — Singapore

Product Description

Frequently Asked Questions

What is the CHICAGO-LATROBE Spiral Point Tap used for?

The CHICAGO-LATROBE Spiral Point Tap is used for threading blind holes in metalworking applications. Its spiral-point design pushes chips forward, preventing clogging, making it ideal for production tapping in automotive, aerospace, and general manufacturing. The H11 / 1B oversized tolerance suits repair or coating applications.

What are the specifications of the CHICAGO-LATROBE Spiral Point Tap?

This tap has a 3/4"-10 UNC thread, H11 / 1B oversized tolerance, 4 flutes, plug chamfer, and is made of high-speed steel. The manufacturer part number is 313512. It is designed for through-hole or blind-hole tapping in ferrous and non-ferrous materials, offering chip evacuation and thread accuracy.

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 on the CHICAGO-LATROBE Spiral Point Tap MPN 313512.

How to select the correct CHICAGO-LATROBE tap size?

Select the tap size based on thread specification (3/4"-10 UNC), material type, and tolerance class (H11 / 1B). For oversized threads, confirm the hole diameter matches the tap's H11 limit. Use a tap drill chart for pre-drill size. CHICAGO-LATROBE taps are high-speed steel; ensure proper cutting fluid for material.

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

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