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Gas Connectors

Discover our high-performance collection of gas connectors at WeldingMart, designed to ensure secure and leak-free connections in all your welding and cutting applications. Our premium gas connectors are essential for professional welders and industrial operations, providing robust, reliable connections between gas hoses and equipment.
  • Harris 8808851 brass adaptor for acetylene welding tanks, hex nut with male thread and O-ring, ideal welding accessory.

    Harris Tank-to-Regulator B-to-MC Adaptor - 8808851

    $32.76
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  • Harris MC-to-B Adaptor 8808850 for acetylene welding regulators, brass compression fitting, hex nut, on white background.

    Harris Regulator-to-Tank MC-to-B Adaptor - 8808850

    $32.76
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  • Harris Pigtail 6 FT PTFE lined braided stainless steel gas hose with brass fittings—ideal welding accessory for propane connections.

    Harris Pigtail 6 FT 1/4NPTF PTFE LINED - 9005807

    $148.25
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  • Harris Hose M/A-to-F/B LH Acetylene Adaptor 9004419, brass welding accessory with hex nut, male connector for acetylene tools.

    Harris Hose M/A-to-F/B LH Acetylene Adaptor - 9004419

    $18.17
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  • Harris Regulator CGA 200 inlet fitting assembly with brass check valve, M15 x 1/6g RH, welding accessory at WeldingMart.

    Harris Regulator CGA 200 inlet fitting assembly M15 x 1/6g (RH) - 9100934

    $25.91
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  • Harris Regulator Inlet Stem CGA 200-1/4NPT 2" brass adapter for welding regulators, gas equipment, and fluid transfer systems.

    Harris Regulator Inlet Stem CGA 200-1/4NPT 2" LONG - 9005126

    $28.07
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  • Harris Model 2357-3 brass nipple for 2290 heating tips—threaded replacement part for welding torches and piping systems.

    Harris Model 2357-3 Nipple for Model 2290 Heating Tips - 9000738

    $18.48
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  • Harris Regulator Inlet Stem 9000667, brass hex nut, threaded end, tapered barb for welding equipment, on white background.

    Harris Regulator Inlet Stem CGA 200 M15 X 1/6gr (RH) X 2.5"L (K) Stem - 9000667

    $9.73
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  • The Harris Hose Adaptor 8800527 brass check valve for welding, with 1/4" NPT male adaptor, threaded ends, on white background.

    Harris Hose Adaptor - 8800527

    $17.66
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  • Harris Model 2543 Coupler for Model 2290 heating tips, brass check valve with hex body, welding accessory on white background.

    Harris Model 2543 Coupler for Model 2290 Heating Tips - 8800584

    $54.65
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  • Harris 9004418 brass M/A-F/B RH oxygen adaptor for welding hoses, with hex nut base and threaded male connector for secure fit.

    Harris Hose M/A-to-F/B RH Oxygen Adaptor - 9004418

    $35.65
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  • Harris Hose Adaptor 9004426 for welding, B male to A female, RH oxygen fitting with compression nut, on white background.

    Harris Hose Adaptor "B" size (M) to "A" size (F) (RH) Oxygen - 9004426

    $18.17
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  • Harris 1/2" NPT RH brass manifold union bushing 9005708 for welding equipment, 3000 psi, hex center, shiny finish.

    Harris 1/2" NPT RH Manifold Union Bushing - 9005708

    $29.17
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  • Harris Model 2357 Nipple 9000734 for welding torches; dual threaded with hex center fits Model 2290 heating tips. White background.

    Harris Model 2357 Nipple for Model 2290 Heating Tips - 9000734

    $36.31
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  • Harris Stainless Steel lined pigtail - 72" 1/4X1/4 - 9005795

    Harris Stainless Steel lined pigtail - 72" 1/4X1/4 - 9005795

    $390.59
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  • Harris Pipe Thread Adaptor 8800985, brass hex coupling nut for Model 2290 heating tips, welding tool, on white background.

    Harris Pipe Thread Adaptor for Model 2290 Heating Tips - 8800985

    $7.20 $42.49
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  • Harris PIGTAIL-72" Armored SS Hose, 1/4" NPT(F) x 1/4" NPT(F), CGA 320, welding pigtail, connects propane tanks, WeldingMart.

    Harris PIGTAIL-72" Armored SS-lined SS 1/4" NPT(F) x 1/4" NPT(F) CGA 320 w/CV - 9101996

    $464.27
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  • Harris NIPPLE, 1/4NPTM X 1/8NPTM - 8800512

    Harris NIPPLE, 1/4NPTM X 1/8NPTM - 8800512

    $7.88
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  • Harris 1/2" NPT LH Manifold Union Bushing 9005726 brass welding fitting, hex center, internal/external threads, white background.

    Harris 1/2" NPT LH Manifold Union Bushing - 9005726

    $34.83
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  • Harris PIGTAIL 72" SS-lined welding hose, 1/4" NPT brass fittings, propane connector, coiled, for WeldingMart tools.

    Harris PIGTAIL 72" Armored SS-lined SS 1/4" NPT(F) x 1/4" NPT(M) - 9007828

    $366.07
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  • Harris RH Manifold Union Nut 9005701 for welding, 1"-11.5 NPS thread, 3000 psi, angled view on white, WeldingMart accessory.

    Harris RH Manifold Union Nut - 9005701

    $34.83
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  • Harris LH Manifold Union Nut 9005725 with CGA-V10 internal threading, welding equipment accessory, on white background.

    Harris LH Manifold Union Nut - 9005725

    $42.55
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  • Harris 36" armored SS propane welding hose, stainless steel braid, 1/4" NPT brass fittings, plastic knob, WeldingMart tool.

    Harris 36" Armored SS-lined SS 1/4" NPT(F) x 1/4" NPT(F) - 9005794

    $223.85
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  • Harris Model 2327 Coupler for 2290 Heating Tips, brass hex nut for welding torches, WeldingMart welding accessory, on white.

    Harris Model 2327 Coupler for Model 2290 Heating Tips - 9000720

    $38.12
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  • Harris PIGTAIL-36" PTFE-lined braided gas hose 1/4" NPT(F) to NPT(F), for welding equipment, Model 9103372 at WeldingMart.

    Harris PIGTAIL-36" PTFE-lined braided assembly 1/4" NPT(F) x 1/4" NPT(F) Cyl 580 to MNF 580 - 9103372

    $267.80
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  • Harris PIGTAIL-36" Armored SS hose with brass fittings, CGA 580, welding accessory for gas equipment, on white background.

    Harris PIGTAIL-36" Armored SS-lined SS 1/4" NPT(F) x 1/4" NPT(F) CGA 580 w/CV - 9103422

    $346.22
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  • Harris Regulator Inlet Stem CGA 300 1/4"NPT brass fitting for welding equipment, hex base, cylinder body, on white background.

    Harris Regulator Inlet Stem CGA 300 1/4"NPT 2.5 - 9005108

    $11.10
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  • Harris 957-R Nipple-Outlet for Ironferno Torch, external threads, hex center—welding torch accessory. White background.

    Harris Model 957-R Nipple-outlet for Ironferno Torch - 9000194

    $11.15
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  • Harris 3/8" NPT brass manifold union nipple 9005759 for welding equipment, durable fitting with flange, on white background.

    Harris 3/8" NPT Manifold Union Nipple - 9005759

    $27.11 $28.28
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  • Harris 1/2" NPT Manifold Union Nipple 9005703 brass welding accessory with threaded end and flange, shown on white background.

    Harris 1/2" NPT Manifold Union Nipple - 9005703

    $34.31 $35.80
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  • Harris 3/8" NPT LH Manifold Union Bushing 9005727 for welding, brass finish, hex nut, valve opening, compact design.

    Harris 3/8" NPT LH Manifold Union Bushing - 9005727

    $59.93
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  • Harris 3/8" NPT RH Manifold Union Bushing 9005747 brass welding accessory with mesh filter, for gas tools, on white background.

    Harris 3/8" NPT RH Manifold Union Bushing - 9005747

    $80.32
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  • Harris PIGTAIL-24" SS-lined armored hose with brass fittings, CGA 320 w/CV—welding gas line adapter, durable welding accessory.

    Harris PIGTAIL-24" Armored SS-lined SS 1/4" NPT(F) x 1/4" NPT(F) CGA 320 w/CV - 9103410

    $322.60
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  • Harris PIGTAIL-36" armored SS hose, CGA 510A, 1/4" NPT(F), welding gas connection for propane tanks, WeldingMart accessory.

    Harris PIGTAIL-36" Armored SS-lined SS 1/4" NPT(F) x 1/4" NPT(F) CGA 510A w/CV - 9103598

    $603.18
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  • Harris Tip-to-Tip Tube Adaptor 0.50"-25 UNS-2B (9004429) brass, threaded, welding accessory for oxy-acetylene torch setups.

    Harris Tip-to-Tip Tube Adaptor 0.50"-25 UNS-2B - 9004429

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  • Harris 9004218 brass tube adaptor for welding tools, ribbed hose barb, 3/8"-24 UNF x 1/4"-27 UNS, WeldingMart accessory.

    Harris Tip-to-Tip Tube Adaptor 3/8"- 24 UNF X 1/4"-27 UNS - 9004218

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Reliable Gas Connectors for Safe and Efficient Welding

Discover our high-performance collection of gas connectors at WeldingMart, designed to ensure secure and leak-free connections in all your welding and cutting applications. Our premium gas connectors are essential for professional welders and industrial operations, providing robust, reliable connections between gas hoses and equipment. Crafted from durable materials, these connectors are built to withstand the rigors of demanding work environments, ensuring long-lasting performance and safety. Whether you’re working with oxy-fuel systems, cutting, or brazing, our gas connectors offer easy installation and strong resistance to wear and corrosion. With various sizes and configurations available, you can find the perfect connectors to suit your specific needs. Upgrade your welding setup with our top-rated gas connectors from trusted brands like Harris Products, and experience the confidence of secure, efficient gas flow. Shop now at WeldingMart to equip yourself with the best gas connectors for optimal welding results.

Frequently Asked Questions

What is the difference between CGA and non-CGA gas connectors?
CGA (Compressed Gas Association) connectors follow a published standard that assigns specific thread sizes, handedness, and physical dimensions to each gas type, making it impossible to accidentally connect the wrong regulator to a cylinder. Non-CGA connectors appear in some imported or proprietary equipment. Always use CGA-compliant connectors on cylinders: the CGA standard is the safety backbone of the whole oxy-fuel gas system.
Why do fuel gas connectors have left-hand threads while oxygen connectors have right-hand threads?
Left-hand threads on fuel gas (acetylene, propane, etc.) connections are a deliberate anti-mix-up design. Standard right-hand-threaded oxygen fittings cannot be screwed into left-hand-threaded fuel gas ports, preventing the potentially fatal error of connecting oxygen directly into a fuel gas line. The fuel gas nut is also identified by a groove machined into the outside of the swivel nut.
Can I use a Teflon tape or thread sealant on gas connector threads?
No — do not use Teflon tape or pipe dope on oxygen connectors. Organic materials like PTFE tape can ignite violently in high-pressure oxygen. Fuel gas connections should also not use standard pipe dope; use only sealants specifically approved for the gas service (such as an oxygen-compatible thread sealant where a manufacturer specifies one). Most welding gas fittings are designed to seal metal-to-metal with a flat or tapered seat and do not need thread sealant.
How do I check a gas connector or fitting for leaks?
Apply an approved leak-detection solution (or diluted dish soap) to all connections after assembly and with gas pressure applied. Watch for bubbles — any bubble formation, even slow ones, indicates a leak that must be corrected before welding. Never use an open flame to check for gas leaks. Tighten fittings to hand-tight plus a quarter turn with a wrench; over-tightening can damage the seat or crack brass fittings.
What is a B-size (small) connector versus a standard full-size connector?
Compressed gas connectors come in multiple body sizes. The B-size (sometimes called 'B' or 'CGA B') is a smaller, lighter connector used on smaller cylinders and laboratory-type gas equipment, while the standard larger body is used on industrial cylinders. Both may share the same thread CGA designation number but differ in physical body diameter. Check the size on your existing regulator or ask your gas supplier which size your cylinders require.