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Stainless Steel Duolok Tube Fitting, 0.25 Inch Tube OD To 1/8-27 Male NPT, 90 deg Elbow

Description & Features

SSP Duolok stainless steel tube fittings are engineered to provide a secure leak-proof connection in instrumentation and process tubing systems. The double ferrule design accommodates variations in tubing materials hardness and wall thickness ensuring a tight seal across a wide range of applications.

Constructed from type 316 stainless steel cold-finished bear stock and close-grained 316 stainless steel forgings these fittings meet ASTM A-276 ASTM A-479 and ASTM A-182 standards. All components are heat code traceable with certified material test reports (CMTRs) available.

Duolok tube fittings are designed manufactured and quality controlled to be totally interchangeable with the Swagelok brand of tube fittings. Gageability is ensured for sufficient pull-up during initial installation. Contact us for detailed assembly instructions.

The fittings are generally rated for pressures equal to the maximum allowable working pressures of the recommended stainless steel tubing. They also function reliably in a wide range of operating temperatures though elevated temperatures may reduce the systems maximum working pressure capability.

MPN: ISSD4ME2

Supplier Part Number: ISSD4ME2

Specifications

A 1.06	Bx 0.77	By 0.74	D 0.60	E 0.17	Brand Ssp Fittings Corp	Brand SSP Fittings Corp	Pack Size 1.00	UOM EA	Supplier Part Number ISSD4ME2	T 0.25	Thread 1 1/8-27	Alternate Part Numbers Alternate Part Number C1FP13, Alternate Part Number MI-04294568, Alternate Part Number MINO-00766X00028	Product Weight 0.08 lbs

Similar Products

Model Number	T	Thread 1	A	Bx	By	D	E
ISSD4ME4 Stainless Duolok To Male NPT 90 Elbow	0.25	1/4-18	1.06	0.77	0.92	0.6	0.19
ISSD6ME6 Stainless Duolok To Male NPT 90 Elbow	0.38	3/8-18	1.23	0.94	1.03	0.66	0.28
ISSD12ME12 Stainless Duolok To Male NPT 90 Elbow	0.75	3/4-14	1.57	1.17	1.45	0.96	0.62
ISSD4ME2 Stainless Duolok To Male NPT 90 Elbow	0.25	1/8-27	1.06	0.77	0.74	0.6	0.17
ISSD8ME6 Stainless Duolok To Male NPT 90 Elbow	0.5	3/8-18	1.42	1.02	1.11	0.9	0.38

Product Questions & Answers (3)

Question by: Chad W on Aug 10, 2025, 5:30 PM

trying to hook 1/4" stainless tubing into a 1/8-27 npt port, is this the right 90 elbow for that?

Answer by: Customer Support on Aug 12, 2025, 6:18 AM

For a 1/4 inch tube OD run going into a 1/8-27 male NPT connection, that matches what this fitting is built for. It is a 90 degree elbow with a Duolok double ferrule tube end on one side and a 1/8-27 male NPT thread on the other.

Question by: Gene T on Oct 20, 2025, 10:29 AM

Will this here fitting work alright with regular stainless steel tubing?

Answer by: Customer Support on Oct 22, 2025, 6:21 AM

This fitting is designed for use with stainless steel tubing, and its pressure rating generally matches the maximum allowable working pressure of compatible stainless steel tubing.

Question by: Keith P on Nov 12, 2025, 7:16 AM

these fittings say they're interchangeable with Swagelok, is that actually reliable or just marketing talk?

Answer by: Customer Support on Nov 13, 2025, 6:39 PM

SSP backs that up with real engineering. The Duolok fittings are manufactured and quality controlled specifically to be fully interchangeable with Swagelok tube fittings, not just dimensionally close. The double ferrule design follows the same functional principles, so if you're swapping into an existing Swagelok setup, these should drop right in without any fitment headaches.