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CHICAGO-LATROBE 3/8"-16 UNC Spiral-Point Extension Tap - Spiral-Point Extension Taps
CHICAGO-LATROBESpiral-Point Extension Taps

CHICAGO-LATROBE 3/8"-16 UNC Spiral-Point Extension Tap

The CHICAGO-LATROBE Spiral Point Tap (3/8"-16 UNC, MPN 918940) is a spiral-point extension tap with H3 / 2B tolerance, plug chamfer, 3 flutes, and high-speed steel construction. 3G Electric interprets demand and…

SKU 3G-OTH-313583

Brand
CHICAGO-LATROBE
Item
3/8"-16 UNC Spiral-Point Extension Tap
Category
Spiral-Point Extension Taps
Available to Order
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

CHICAGO-LATROBE
Manufacturer Part Number
918940
Type
H3 / 2B, Plug Chamfer, 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 Spiral Point Tap (3/8"-16 UNC, MPN 918940) is a spiral-point extension tap with H3 / 2B tolerance, plug chamfer, 3 flutes, and high-speed steel construction. 3G Electric interprets demand and delivers this genuine industrial tool across 14 departments — with specialist depth in combustion, pumps, and controls as an authorised distributor.

Frequently Asked Questions

What is a Chicago-Latrobe spiral point tap used for?

A Chicago-Latrobe spiral point tap is used for threading through holes in metal, directing chips forward to prevent clogging. It is common in automotive, aerospace, and general machining applications where clean, efficient thread cutting in steel, aluminum, and alloys is required.

What are the specifications of the Chicago-Latrobe 918940 tap?

The Chicago-Latrobe 918940 is a spiral point tap with 3/8"-16 UNC thread, H3 / 2B tolerance, 3 flutes, and a plug chamfer. It is made of high-speed steel (HSS) and is designed for through-hole threading in ferrous and non-ferrous materials.

Where to buy Chicago-Latrobe taps in worldwide?

3G Electric supplies Chicago-Latrobe taps worldwide, including the 918940 spiral point tap. We handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this and other industrial cutting tools.

How to select the right spiral point tap for a job?

Select a spiral point tap based on thread size, pitch, material, and hole type. For through holes, a plug chamfer like the Chicago-Latrobe 918940 works well. Match the H limit (e.g., H3) to your desired thread class (e.g., 2B) and ensure the tap material suits your workpiece.

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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Spiral-point extension tap for through-hole threading. Made of high-speed steel with a plug chamfer and 2-flute design. Thread size 1/4"-20 UNC, tolerance H3 / 2B. The spiral-point geometry pushes chips forward, reducing clogging in production environments
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Spiral-point extension tap for through-hole threading. Made of high-speed steel with a plug chamfer and 2-flute design. Thread size 1/4"-20 UNC, tolerance H3 / 2B. The spiral-point geometry pushes chips forward, reducing clogging in production environments
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Spiral-point extension tap with 5/16"-24 UNF thread, H3 / 2B tolerance, plug chamfer, and 2 flutes. Made from high-speed steel for threading blind or through holes in metal. Suitable for production tapping in steel, aluminum, and alloys
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Spiral-point extension tap for through-hole threading. Features a 5/16"-18 UNC thread, H3 / 2B tolerance, 2-flute design, plug chamfer, and high-speed steel construction. The spiral point pushes chips forward, reducing clogging in production threading applications
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Spiral-point extension tap for through-hole threading in metalworking. #10-24 UNC thread size, H3 / 2B tolerance, plug chamfer, high-speed steel construction, 2-flute design. Suitable for general-purpose tapping in production and maintenance applications
Spiral-point extension tap for threading blind or through holes in metal. Directs chips forward to prevent clogging. Made of high-speed steel with H3 / 2B tolerance, plug chamfer, and 2 flutes. Suitable for general machining applications requiring clean, accurate threads
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Spiral-point extension tap for threading blind or through holes in metal. Directs chips forward to prevent clogging. Made of high-speed steel with H3 / 2B tolerance, plug chamfer, and 2 flutes. Suitable for general machining applications requiring clean, accurate threads
This spiral-point extension tap is designed for threading blind or through holes where extended reach is required. It features a plug chamfer and three flutes, made from high-speed steel with H11 tolerance. Suitable for precision tapping in maintenance, repair, and production environments
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This spiral-point extension tap is designed for threading blind or through holes where extended reach is required. It features a plug chamfer and three flutes, made from high-speed steel with H11 tolerance. Suitable for precision tapping in maintenance, repair, and production environments

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This spiral-point extension tap is designed for through-hole threading in production environments. The spiral point pushes chips ahead, preventing clogging and enabling faster threading in materials such as steel and aluminum. Made of high-speed steel with a plug chamfer and H3/2B tolerance, it has 2 flutes and a 1/4"-28 UNF thread size
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This spiral-point extension tap is designed for through-hole threading in production environments. The spiral point pushes chips ahead, preventing clogging and enabling faster threading in materials such as steel and aluminum. Made of high-speed steel with a plug chamfer and H3/2B tolerance, it has 2 flutes and a 1/4"-28 UNF thread size
Spiral-point extension tap for through-hole threading in hard-to-reach or deep-hole applications. Thread size 5/16"-18 UNC, H11 tolerance, 3 flutes, plug chamfer. Extended shank allows threading in recessed areas, blind holes, or where standard taps cannot reach
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Spiral-point extension tap for through-hole threading in hard-to-reach or deep-hole applications. Thread size 5/16"-18 UNC, H11 tolerance, 3 flutes, plug chamfer. Extended shank allows threading in recessed areas, blind holes, or where standard taps cannot reach
High speed steel spiral-point extension tap with M16x2 metric thread, D11 size, plug chamfer, and 3 flutes. Designed for cutting internal threads in deep or hard-to-reach holes where standard taps cannot reach, such as in engine blocks or hydraulic manifolds
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High speed steel spiral-point extension tap with M16x2 metric thread, D11 size, plug chamfer, and 3 flutes. Designed for cutting internal threads in deep or hard-to-reach holes where standard taps cannot reach, such as in engine blocks or hydraulic manifolds
This spiral-point extension tap is designed for threading deep or hard-to-reach holes in metal where a standard tap cannot reach. Made from high-speed steel with a D11 plug chamfer and 3 flutes, it pushes chips forward for efficient through-hole threading. Commonly used in industrial machining and maintenance applications
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This spiral-point extension tap is designed for threading deep or hard-to-reach holes in metal where a standard tap cannot reach. Made from high-speed steel with a D11 plug chamfer and 3 flutes, it pushes chips forward for efficient through-hole threading. Commonly used in industrial machining and maintenance applications
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High-speed steel spiral-point extension tap with M10x1.5 metric thread, D11 size, plug chamfer, and 3 flutes. Designed for cutting internal threads in deep or hard-to-reach holes where standard taps cannot access. Suitable for through-hole threading in common materials such as steel and aluminum
CHICAGO-LATROBE Spiral Point Tap: 3/8"-24 UNF, H3 / 2B, 3 Flute, Plug Chamfer, High Speed Steel (MPN 918941)
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This spiral-point extension tap is designed for threading deep or hard-to-reach holes where standard taps cannot reach. Made from black oxide high-speed steel with H11 tolerance, it features 3 flutes and a plug chamfer for efficient chip evacuation and precise thread cutting in steel and other materials
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This spiral-point extension tap is designed for threading deep or hard-to-reach holes where standard taps cannot reach. Made from black oxide high-speed steel with H11 tolerance, it features 3 flutes and a plug chamfer for efficient chip evacuation and precise thread cutting in steel and other materials
This spiral-point extension tap is designed for cutting internal threads in deep or hard-to-reach holes. Made from high-speed steel with a plug chamfer and 3 flutes, it is suited for through-hole threading applications in machining and industrial maintenance
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This spiral-point extension tap is designed for cutting internal threads in deep or hard-to-reach holes. Made from high-speed steel with a plug chamfer and 3 flutes, it is suited for through-hole threading applications in machining and industrial maintenance