Bull Plug Hollow API 8RD Threads

High-strength threaded plugs for secure pipe sealing and industrial applications

External Product View

API Round Thread Structure

Precision Hollow API 8 Round Thread Design

The Bull Plug – Hollow API 8 Round Thread is engineered for demanding oilfield and drilling applications. It features API round threads that ensure secure and reliable connections, while the hollow core allows pressure testing, fluid passage, and monitoring operations. Manufactured from high-strength materials, it provides excellent durability, tight sealing performance, and long service life in high-pressure environments.

Key Design Features

API 8 round thread connection for secure fit
Hollow core design for testing and fluid flow
High-strength construction for oilfield applications
Precision threading for leak-resistant sealing
Suitable for high-pressure drilling environments
Corrosion-resistant material options available

Size Range

1/2" – 4"

Pressure Rating

Up to 10,000 PSI

Thread Type

API 8 Round

Standard

API Spec 5B

Material

Carbon / Alloy / SS

Key Features

Engineered for Oilfield Performance

API 8 Round Thread Design

Designed with API 8 round threads to ensure secure, reliable, and industry-compliant connections in oilfield applications.

API Spec 5B Compliant

Hollow Core Functionality

Internal hollow design allows pressure testing, fluid passage, and monitoring operations in drilling systems.

Testing & Flow Support

High Strength Construction

Manufactured using high-grade materials to provide excellent strength and durability in demanding oilfield conditions.

Heavy-Duty Performance

Precision Machined Threads

CNC-machined threads ensure tight tolerances, smooth engagement, and leak-resistant sealing performance.

Accurate Thread Fit

High-Pressure Capability

Suitable for high-pressure drilling and oilfield systems requiring secure and reliable end closures.

Up to 10,000 PSI

Hollow – API 8 Round Threads

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Pipe Size	A	B	C			Wt. Ea.
Pipe Size	A	B	STD	XH	XXH	STD	XH	XXH
2	2.594	5.000	1.995	1.875	1.500	3.50	4.00	9.00
2-1/2	3.093	5.500	2.441	2.312	1.750	4.25	6.00	14.00
3	3.750	6.500	2.992	2.875	2.250	10.00	15.00	25.00
3-1/2	4.250	7.000	3.476	3.375	2.750	-	-	-

Standards: API 5B, API J55 / N80, API EUE 8RD
Finish: Electro-Zinc Plated

Applications

Where Our Products Perform

⛽

Oil & Gas Pipelines

🏭

Petrochemical Plants

⚙️

Refineries

⚡

Power Plants

FAQ

Frequently Asked Questions

What is a Bull Plug – Hollow API 8 Round Thread? +

This bull plug is a hollow-type pipe fitting designed with API 8 round threads for oilfield applications. It is used for sealing pipe ends while allowing pressure testing, monitoring, or fluid passage.

What standards does this product comply with? +

It complies with API 5B standards and is commonly manufactured using API J55 and N80 material grades with API EUE 8RD threading.

What is the purpose of the hollow design? +

The hollow core allows fluid flow, pressure testing, and inspection operations, making it ideal for drilling and oilfield systems.

What sizes are available? +

Common sizes include 2", 2-1/2", 3", and 3-1/2", with various wall thickness options such as STD, XH, and XXH.

Where are these bull plugs used? +

They are widely used in oil & gas drilling operations, wellhead systems, tubing lines, and high-pressure oilfield applications.

Get API 8 Round Thread Bull Plugs for Oilfield Applications

Looking for high-performance hollow bull plugs with API 8 round threads? Contact us today for reliable oilfield solutions, competitive pricing, and fast delivery tailored to your project requirements.