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Superlok Compression Tube Fittings


Technical Specs

Primary Connection Range:
1/8" - 1" Fractional Tube
Secondary Connection Range:
1/8" - 1" MNPT
Alt Primary Connection Range:
Alt Secondary Connection Range:
Pressure Rating:
Body Material:
Stainless - 316L - Passivated
Port Size:
Orifice Size:
Seal Type:
Double Ferrule
Seal Material:
316L Stainless
Seat Material:


Connects Two Fractional Tubes To One Female NPT Port

This fitting has two compression connections inline with a male NPT thread on the run. They are ideal for connecting female ports near to obstacles and feeding two lines from one outlet.

The Superlok SMRTI also features i-Fitting technology on all compression connections between 1/4" and 1".

For more information contact Mako today!


Connects Fractional Tubes To Female NPT Thread

If you have two fractional tubes that need to meet at a 90° angle while connecting into a female NPT thread, Superlok’s male threaded run tees are the ideal fitting for the job.

These fittings offer superior connection strength while remaining easy to handle and install. Once you screw the male and female ends together, you can then connect the fractional tubes into their appropriate slots in the fitting body.

Whether you have two separate flows coming together or one splitting apart, these run fittings maintain Superlok’s trademark design that guarantees strength and efficiency. Interior finishing stimulates flow and reduces leak risk, and overall strength allows it to handle continual exposure to extreme temperatures, vibrations and pulsations.

With Mako Products’ i-Fitting system, you gain additional safeguard against connection issues other competitors can’t protect you from. Built-in gap gauges on both openings indicate when you’ve reached the ideal level of tightness, which produces balance and integrity between the two seals.

Available tube sizes:
  • 1/8"
  • 3/16"
  • 1/4"
  • 5/16"
  • 3/8"
  • 1/2"
  • 5/8"
  • 3/4"
  • 3mm
  • 4mm
  • 6mm
  • 8mm
  • 10mm
  • 12mm
  • 16mm
  • 20mm
Available thread sizes:
  • 1/8"
  • 1/4"
  • 3/8"
  • 1/2"
  • 3/4"


Contact our customer service team to learn more about our male threaded run tees.

Cross Brand Part Number Look-Up

Size Superlok Swagelok Parker Hylok DK-LOK Hamlet Tylok Brennan Hoke SSP
1/8"T X 1/8"NPT SMRT-2-2N SS-200-3-2TMT 2MRT2N-316 CRTM2-2N-S316 DTRM2-2N-S 771L_1/8 X 1/8 SS-2-DTMT-2 N2605-02-02-02-SS 2TMT2316 ISSD2MRT2
1/4"T X 1/8"NPT SMRTI-4-2N SS-400-3-2TMT 4MRT2N-316 CRTM4-2N-S316 DTRM4-2N-S 771L _ 1/4 X 1/8 SS-4-DTMT-2 N2605-04-02-04-SS 4TMT2316 ISSD4MRT2
1/4"T X 1/4"NPT SMRTI-4-4N SS-400-3-4TMT 4MRT4N-316 CRTM4-4N-S316 DTRM4-4N-S 771L _ 1/4 X 1/4 SS-4-DTMT-4 N2605-04-04-04-SS 4TMT4316 ISSD4MRT4
1/4"T X 3/8"NPT SMRTI-4-6N SS-400-3-6TMT 4MRT6N-316 CRTM4-6N-S316 DTRM4-6N-S 771L _ 1/4 X 3/8 SS-4-DTMT-6 N2605-04-06-04-SS 4TMT6316 ISSD4MRT6
1/4"T X 1/2"NPT SMRTI-4-8N SS-400-3-8TMT 4MRT8N-316 CRTM-4-8N-S316 DTRM4-8N-S 771L _ 1/4 X 1/2 SS-4-DTMT-8 N2605-04-08-04-SS 4TMT8316 ISSD4MRT8
3/8"T X 1/8"NPT SMRTI-6-2N SS-600-3-2TMT 6MRT2N-316 CRTM6-2N-S316 DTRM6-2N-S 771L _ 3/8 X 1/8 SS-6-DTMT-2 N2605-06-02-06-SS 6TMT2316 ISSD6MRT2
3/8"T X 1/4"NPT SMRTI-6-4N SS-600-3-4TMT 6MRT4N-316 CRTM6-4N-S316 DTRM6-4N-S 771L _ 3/8 X 1/4 SS-6-DTMT-4 N2605-06-04-06-SS 6TMT4316 ISSD6MRT4
3/8"T X 3/8"NPT SMRTI-6-6N SS-600-3-6TMT 6MRT6N-316 CRTM6-6N-S316 DTRM6-6N-S 771L _ 3/8 X 3/8 SS-6-DTMT-6 N2605-06-06-06-SS 6TMT6316 ISSD6MRT6
3/8"T X 1/2"NPT SMRTI-6-8N SS-600-3-8TMT 6MRT8N-316 CRTM6-8N-S316 DTRM-6-8N-S 771L _ 3/8 X 1/2 SS-6-DTMT-8 N2605-06-08-06-SS 6TMT8316 ISSD6MRT8
1/2"T X 1/4"NPT SMRTI-8-4N SS-810-3-4TMT 8MRT4N-316 CRTM8-4N-S316 DTRM8-4N-S 771L _ 1/2 X 1/4 SS-8-DTMT-4 N2605-08-04-08-SS 8TMT4316 ISSD8MRT4
1/2"T X 3/8"NPT SMRTI-8-6N SS-810-3-6TMT 8MRT6N-316 CRTM8-6N-S316 DTRM8-6N-S 771L _ 1/2 X 3/8 SS-8-DTMT-6 N2605-08-06-08-SS 8TMT6316 ISSD8MRT6
1/2"T X 1/2"NPT SMRTI-8-8N SS-810-3-8TMT 8MRT8N-316 CRTM8-8N-S316 DTRM8-8N-S 771L _ 1/2 X 1/2 SS-8-DTMT-8 N2605-08-08-08-SS 8TMT8316 ISSD8MRT8
5/8"T X 1/2"NPT SMRTI-10-8N SS-1010-3-8TMT 10MRT8N-316 CRTM10-8N-S316 DTRM10-8N-S 771L _ 5/8 X 1/2 SS-10-DTMT-8 N2605-10-08-10-SS 10TMT8316 ISSD10MRT8
3/4"T X 3/4"NPT SMRTI-12-12N SS-1210-3-12TMT 12MRT12N-316 CRTM12-12N-S316 DTRM12-12N-S 771L _ 3/4 X 3/4 SS-12-DTMT-12 N2605-12-12-12-SS 12TMT12316 ISSD12MRT12
1"T X 1"NPT SMRTI-16-16N SS-1610-3-16TMT 16MRT16N-316 CRTM16-16N-S316 DTRM16-16N-S 771L _ 1 X 1 SS-16-DTMT-16 N2605-16-16-12-SS 16TMT16316 ISSD16MRT16

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