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Brass Duolok Tube Fitting, 0.25 Inch Tube OD Plug

Description & Features

Duolok tube fittings ensure secure leak-tight connections in instrumentation and process tubing systems. Utilizing a double ferrule design these fittings adapt to variations in tubing materials hardness and wall thickness. Constructed from CA360 and CA345 premium brass bar stock and precision forgings of CA-377 brass they adhere to ASTM standards.

These fittings are compatible with copper tubing and offer gaugeability for adequate pull-up during initial installation. Pressure ratings match the maximum allowable working pressures of recommended tubing with some exceptions. Reliable performance is maintained across a wide range of operating temperatures though elevated temperatures may affect pressure capabilities.

For easy integration Duolok fittings are designed to be interchangeable with Swagelok brand tube fittings. The Brass Duolok Tube Fitting 0.25 Inch Tube OD Plug is an ideal solution for those requiring consistent high-quality tube connections.

Supplier Part Number: IBD4P

Specifications

Brand Ssp Fittings Corp	Brand SSP Fittings Corp	Pack Size 1.00	UOM EA	G 0.56	Supplier Part Number IBD4P	T 0.25	Alternate Part Numbers Alternate Part Number C1FN59, Alternate Part Number MI-04294567, Alternate Part Number MINO-00766X00027	Product Weight 0.03 lbs

Similar Products

Model Number	T	G	Price	Action
IBD4P Brass Duolok Tube Plug	0.25	0.5625

Product Questions & Answers (2)

Question by: Phil M on Nov 8, 2025, 6:17 AM

these swap right in for Swagelok fittings, yeah? got a 1/4 inch tube line I need to plug off and don't want to have to source a whole different brand

Answer by: Customer Support on Nov 9, 2025, 7:14 AM

Correct on both counts. Duolok fittings are manufactured to be fully interchangeable with Swagelok brand tube fittings, so swapping one in for the other on a 1/4 inch tube line is a straightforward substitution. No adapter or modification needed.

Question by: Roy R on Apr 10, 2025, 3:54 PM

Hey, will this plug work with regular ol' copper tubing?

Answer by: Customer Support on Apr 12, 2025, 11:22 AM

these Duolok fittings are designed to work just fine with copper tubing.