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Stainless Steel Duolok Tube Fitting, 0.25 Inch Tube OD To 1/4-18 Male NPT, Straight

A 1.49	B 1.20	D 0.60	E 0.19	Brand Ssp Fittings Corp	Brand SSP Fittings Corp	Pack Size 1.00	UOM EA	Supplier Part Number ISSD4MC4	T 0.25	Thread 1 1/4-18	Alternate Part Numbers Alternate Part Number C1FN98, Alternate Part Number MI-04172103, Alternate Part Number MINO-00766X58906, Alternate Part Number SS-400-1-4	Product Weight 0.14 lbs

Product Questions & Answers 4

Product Questions & Answers

got 1/4 inch stainless tubing here, does this fitting go from that tube to 1/4-18 male npt?

Question by: Gary C on Dec 3, 2025, 8:50 PM

For a straight tube-to-thread hookup, this one matches 0.25 inch tube OD on the Duolok side and a 1/4-18 male NPT thread on the other end.

Answer by: Customer Support on Dec 5, 2025, 8:57 AM

What kind of pressures can this fitting handle?

Question by: Melvin S on Aug 24, 2025, 7:26 AM

Duolok tube fittings generally work up to the maximum allowable pressure of the stainless steel tubing recommended for use with them. Just keep in mind some specialized fittings might have a lower pressure rating.

Answer by: Customer Support on Aug 25, 2025, 2:44 PM

these swap out direct with swagelok fittings or do i need to change anything out when i switch over?

Question by: Brenda H on Mar 17, 2026, 1:33 PM

Duolok fittings are manufactured to be fully interchangeable with Swagelok brand tube fittings, so you can swap them in without any additional changes. The dimensions and double ferrule design are built to match, which means existing tubing and hardware stay put. No modifications needed on your end.

Answer by: Customer Support on Mar 19, 2026, 6:04 AM

Is this fitting completely interchangeable with Swagelok fittings?

Question by: Brenda T on Nov 16, 2025, 6:00 AM

Yes, Duolok tube fittings are designed to be totally interchangeable with the Swagelok brand.

Answer by: Customer Support on Nov 17, 2025, 12:16 PM

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Model Number	T	Thread 1	A	B	D	E
ISSD10MC8	0.63	1/2-14	1.93	1.53	0.96	0.47
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