EXW Singapore — collect or forward from our Singapore office.

3G Electric
OSG 1/2"-20 UNF Oversized Spiral-Point Tap - Oversized Spiral-Point Taps
OSGOversized Spiral-Point Taps

OSG 1/2"-20 UNF Oversized Spiral-Point Tap

OSG Oversized Spiral-Point Taps.

SKU 3G-OTH-251226

Brand
OSG
Item
1/2"-20 UNF Oversized Spiral-Point Tap
Part Number
2842901
Category
Oversized Spiral-Point Taps
Available to Order
Also known as:2842901OSG
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
EXW Singapore
Collect or forward from our office
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

OSG
Manufacturer Part Number
2842901

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

OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

OSG Oversized Spiral-Point Taps.

Frequently Asked Questions

What is the OSG spiral point tap 1/2"-20 UNF used for?

This OSG spiral point tap is designed for through-hole threading in ferrous and non-ferrous materials. Its spiral point pushes chips ahead, reducing clogging. Common applications include automotive, aerospace, and general manufacturing where precise UNF threads are required.

What are the specifications of the OSG 2842901 tap?

The OSG 2842901 is a 1/2"-20 UNF oversized spiral point tap with H11 tolerance for 2B class fit. It has 3 flutes and a plug chamfer. The oversized design compensates for coating or post-treatment buildup. It is made from premium high-speed steel for durability.

Where to buy OSG taps in worldwide?

You can source OSG taps worldwide through 3G Electric, a global industrial equipment distributor since 1990. We handle full logistics, customs clearance, and delivery to your facility. Contact us for availability and lead time on the OSG 2842901 or other OSG tooling.

How to select the correct OSG tap for UNF threads?

Select based on thread size, pitch, and class of fit. For 1/2"-20 UNF 2B, use an H11 limit tap like this OSG model. Consider material hardness and hole type: spiral point taps suit through holes. Oversized taps allow for coating thickness. Always match tap tolerance to the required thread class.

Used in

Common applications for OSG
Aerospace — OSG STI taps for installing helical wire thread inserts in aluminum components
Automotive — OSG spiral-point taps for through-hole threading in engine blocks and transmission cases
General machining — OSG spiral-flute taps for blind-hole threading in steel and stainless steel parts
Heavy equipment repair — OSG thread-forming taps for creating threads in ductile iron and steel castings
Precision manufacturing — OSG solid carbide chucking reamers for finishing holes in hydraulic manifolds
Die and mold — OSG coolant-through solid carbide drills for deep-hole drilling in tool steels
Not sure this is the right part? Photo-identify it→

OSG Products

3G Electric supplies OSG oversized spiral-point 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 →

More from OSG

View all OSG parts →
Oversized spiral-point tap for threading through-holes in metal, steel, and alloys. Features H11 tolerance, 3 flutes, plug chamfer, and black oxide vanadium high-speed steel construction. The spiral point design pushes chips forward to prevent clogging and enable faster production. Suitable for applications requiring precise #10-32 UNF threads
OSG
Oversized spiral-point tap for threading through-holes in metal, steel, and alloys. Features H11 tolerance, 3 flutes, plug chamfer, and black oxide vanadium high-speed steel construction. The spiral point design pushes chips forward to prevent clogging and enable faster production. Suitable for applications requiring precise #10-32 UNF threads
OSG oversized spiral-point tap for #10-32 UNF threads, featuring a 2B+ thread class, 2-flute design, plug chamfer, and black oxide high-speed steel construction. The spiral-point geometry pushes chips forward, making it suitable for through-hole threading in metal components. The oversized 2B+ tolerance provides controlled thread fit for applications requiring coating allowance or tight-fit requirements
OSG
OSG oversized spiral-point tap for #10-32 UNF threads, featuring a 2B+ thread class, 2-flute design, plug chamfer, and black oxide high-speed steel construction. The spiral-point geometry pushes chips forward, making it suitable for through-hole threading in metal components. The oversized 2B+ tolerance provides controlled thread fit for applications requiring coating allowance or tight-fit requirements
Oversized spiral-point tap with #4-40 UNC thread size, H7 tolerance, 2 flutes, and plug chamfer. Made from high-speed steel. Designed for threading blind or through holes in ferrous and non-ferrous materials, the spiral-point geometry pushes chips forward to reduce clogging and improve thread quality in production environments
OSG
Oversized spiral-point tap with #4-40 UNC thread size, H7 tolerance, 2 flutes, and plug chamfer. Made from high-speed steel. Designed for threading blind or through holes in ferrous and non-ferrous materials, the spiral-point geometry pushes chips forward to reduce clogging and improve thread quality in production environments
OSG Spiral Point Tap: M12x1.5 Metric, D11 / 6H, 3 Flute, Plug Chamfer (MPN 2895501)
OSG
OSG Spiral Point Tap: M12x1.5 Metric, D11 / 6H, 3 Flute, Plug Chamfer (MPN 2895501)

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first