Hex Head Pipe Plugs

Hex head pipe plugs provide a reliable solution for sealing pipe ends in a wide range of applications, from plumbing to high-pressure hydraulic systems. Their hexagonal heads ensure easy installation and removal using standard tools. Available in various materials, including stainless steel and exotic alloys like Inconel and Monel, these plugs offer exceptional corrosion resistance and durability. Whether for standard or demanding environments, hex head pipe plugs deliver dependable performance. Explore our selection today to find the perfect fit for your project!

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Specifications

Get our specifications and technical data for pipe plugs.

Hex Plugs and Bushing Dimensions


Nominal Pipe Size	Minimum Length, A	Nominal Width Flats, F	Minimum Hex Height, C
Nominal Pipe Size	Minimum Length, A	Nominal Width Flats, F	Bushing, G	Plug, H
¹/₈	0.38	0.44	—	0.25
¹/₄	0.44	0.62	0.12	0.25
³/₈	0.50	0.69	0.16	0.31
¹/₂	0.56	0.88	0.19	0.31
³/₄	0.62	1.06	0.22	0.38
1	0.75	1.38	0.25	0.38
1 ¹/₄	0.81	1.75	0.28	0.56
1 ¹/₂	0.81	2.00	0.31	0.62
2	0.88	2.50	0.34	0.69
2 ¹/₂	1.06	3.00	0.38	0.75
3	1.12	3.50	0.41	0.81
4	1.25	4.62	0.50	1.00

Pipe Plugs Specifications

STANDARD (ASME / ANSI)
- ASME B16.11-2011
METRIC (ISO / DIN)

Three Blue Hexagons Are Lined Up On A White Background

Product Overview

Get our product definition, description for pipe plugs along applications & industries which employ them.

What are Hex Head Pipe Plugs

A hex head pipe plug is a type of threaded fitting designed to close off the end of a pipe or a fitting, effectively sealing it to prevent the flow of fluids or gases. The term “hex head” refers to the six-sided head shape, which allows for easy installation and removal using a standard wrench or socket.

Hex head pipe plugs are also called:

Hex Plug
Hex Head Plug
Hex Pipe Plug
Hexagonal Pipe Plug
Thread Hex Plug
Male Hex Plug
Hex head Threaded Plug
Hex End Plug

Check out the parts of a hex head pipe plug:

What are the Common Uses

Isolation for Maintenance: Pipe plugs can isolate a section of a pipe so that maintenance or repairs can be conducted without shutting down the entire system.
Pressure Testing: Inflatable or mechanical plugs are used in hydrostatic or pneumatic testing to check the integrity of a pipeline by sealing off sections and applying pressure.
Temporary Sealing: During construction or pipeline modifications, plugs temporarily block off unused or incomplete pipe sections to prevent debris or fluid ingress.
Permanent Sealing: In some cases, pipe plugs are used for permanent closure of abandoned pipes.

Applications

Hex head pipe plugs are used various applications by industries that employ exotic alloys to protect against extreme environments.

High-Temperature Chemical Processing

Hex head pipe plugs seal pipe systems that handle aggressive acids, solvents, and high-temperature chemical flows.
Exotic alloys include Hastelloy® C276, Inconel® 625, & Monel® 400.
Industries include chemical processing, pharmaceuticals, and specialty manufacturing.

Marine & Offshore Environments

Hex head pipe plugs provide corrosion-resistant sealing in seawater-exposed piping and hydraulic systems.
Exotic alloys include Monel® 400, 2205 Duplex Stainless Steel, Titanium Grade 2.
Industries that use hex head pipe plugs include marine engineering, offshore oil and gas, and shipbuilding.

Aerospace and Defense Systems

Hex head pipe plugs seal high-pressure, high-temperature piping in reactors and steam systems.
Exotic alloys that use hex head pipe plugs include Inconel 690, Hastelloy C-22, Zirconium 702.
Industries include nuclear power, thermal energy, and research reactors.

Oil, Gas, and Petrochemical Refineries

Hex head pipe plugs are installed in high-pressured lines in corrosive environments for sealing process streams carrying hydrocarbons and sulfur compounds
Exotic alloys include Incoloy® 825, Hastelloy® C276, and Monel® 400.
Industries that use hex head pipe plugs in these applications include oil and gas extraction, petrochemical refining, and energy infrastructure.

Hex head pipe plugs crafted from exotic alloys like Hastelloy C276, Inconel 625, and Titanium Grade 5 deliver unmatched performance in the most demanding environments. Whether you’re working in chemical processing, aerospace, or offshore energy, choosing the right plug can ensure safety, longevity, and system efficiency.

At Nickel Systems, we specialize in high-performance fittings tailored to your unique requirements. Contact us today to begin your quote and discover the ideal solution for your application.

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Sample Products

Check out our sample products for hex head pipe plugs.

Hex Head Pipe Plug 3/4″ Diameter Hastelloy® C276 Material

Hex Head Pipe Plug 1/2″ Alloy 20 Material

Industries We Serve

Nickel Systems provides high quality exotic grade materials that hold up in the toughest, most severe heat and corrosive environments. With our large inventory of specialty fasteners in stock, we are always ready to answer the call to serve the most challenging applications.