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Superlok Compression Tube Fittings


Technical Specs

Primary Connection Range:
1/8" - 1" Fractional Tubing
Secondary Connection Range:
1/8" - 1" NPT
Alt Primary Connection Range:
6mm - 12mm Metric Tubing
Alt Secondary Connection Range:
Pressure Rating:
Limited by tubing selection and female thread
Body Material:
Stainless - 316L - Passivated
Port Size:
Orifice Size:
Seal Type:
Double Ferrule
Seal Material:
316L Stainless
Seat Material:


Superlok female elbow connectors connect tubing to male tapered threads and feature Superlok i-Fitting technology on all compression tube fitting connections between a 1/4" and 1".

Superlok i-Fitting tube fittings and valves are manufactured with the industry's only built-in gap gauge. During installation, the compression nut is simply tightened until the gap gauge rings pop off. When the gap gauge rings pop, it signals the installer to stop. This is the point of perfect compression and seal, which provides an added level of safety and accuracy for companies worldwide. For more information and installation instructions, check out our article and video.

Superlok brings the only game changer to the tube/compression fitting and valve market. This patented innovation ends leaks that are caused by improper tightening procedures, and from the failure to check the installation with a gap gauge, which all manufacturers require. The new, leak-free technology is so precise, that Superlok extends a lifetime warranty on all tube fittings and valves. If you want it done right the first time, get Superlok!

Contact MAKO Products to inquire about pricing or place an order.


Connects Fractional Tubes To Male NPT Thread

When you need to apply a sharp redirection to fractional tubing with male NPT threads, we have female threaded 90° elbow fittings that will meet the requirements with unmatched success.

With a threaded, compact design, these connectors give you the ability to work in tight spaces without having to hassle over placement and installation. Instead of needing multiple tools and precise placement, the connector will do the work for you.

We offer more than 20 different sizes to match with your relevant fractional tubing. With high-quality materials and meticulous crafting, Superlok female elbows will deliver infallible results for a range of industries. The superior interior finishing helps to optimize gas and liquid flow while reducing contamination and leak risks.

To further prevent leaks and other breaches, Mako Products has implemented an additional measure — the i-Fitting system. Under- or over-tightening the fitting is the No. 1 cause for problems, and reaching the optimal level of tightness is often more about a “gut” feeling. We’ve developed a self gap-gauge on these tube fittings, and you’ll know when you’ve reached the point of perfect compression when the red inspection check ring pops off the body.

Available tube sizes:
  • 1/8"
  • 3/16"
  • 1/4"
  • 5/16"
  • 3/8"
  • 1/2"
  • 5/8"
  • 3/4"
  • 7/8"
  • 1"
  • 6mm
  • 8mm
  • 10mm
  • 12mm
Available thread sizes:
  • 1/8"
  • 1/4"
  • 3/8"
  • 1/2"
  • 3/4"
  • 1"


Our premier customer service team will help to get your tubes running in the right direction. Contact us today to learn more about our female threaded 90° connectors.

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 SFE-2-2N SS-200-8-2 2FEL2N-316 CLF2-2N-S316 DLF2-2N-S 770L_1/8 X 1/8 SS-2-DFE-2 N2502-02-02-SS 2LF2316 ISSD2FE2
1/8"T X 1/4"NPT SFE-2-4N SS-200-8-4 2FEL4N-316 CLF2-4N-S316 DLF2-4N-S 770L _ 1/8 X 1/4 SS-2-DFE-4 N2502-02-04-SS 2LF4316 ISSD2FE4
1/4"T X 1/8"NPT SFEI-4-2N SS-400-8-2 4FEL2N-316 CLF4-2N-S316 DLF4-2N-S 770L _ 1/4 X 1/8 SS-4-DFE-2 N2502-04-02-SS 4LF2316 ISSD4FE2
1/4"T X 1/4"NPT SFEI-4-4N SS-400-8-4 4FEL4N-316 CLF4-4N-S316 DLF4-4N-S 770L _ 1/4 X 1/4 SS-4-DFE-4 N2502-04-04-SS 4LF4316 ISSD4FE4
1/4"T X 3/8"NPT SFEI-4-6N SS-400-8-6 4FEL6N-316 CLF4-6N-S316 DLF4-6N-S 770L _ 1/4 X 3/8 SS-4-DFE-6 N2502-04-06-SS 4LF6316 ISSD4FE6
1/4"T X 1/2"NPT SFEI-4-8N SS-400-8-8 4FEL8N-316 CLF-4-8N-S316 DLF4-8N-S 770L _ 1/4 X 1/2 SS-4-DFE-8 N2502-04-08-SS 4LF8316 ISSD4FE8
3/8"T X 1/8"NPT SFEI-6-2N SS-600-8-2 6FEL2N-316 CLF6-2N-S316 DLF6-2N-S 770L _ 3/8 X 1/8 SS-6-DFE-2 N2502-06-02-SS 6LF2316 ISSD6FE2
3/8"T X 1/4"NPT SFEI-6-4N SS-600-8-4 6FEL4N-316 CLF6-4N-S316 DLF6-4N-S 770L _ 3/8 X 1/4 SS-6-DFE-4 N2502-06-04-SS 6LF4316 ISSD6FE4
3/8"T X 3/8"NPT SFEI-6-6N SS-600-8-6 6FEL6N-316 CLF6-6N-S316 DLF6-6N-S 770L _ 3/8 X 3/8 SS-6-DFE-6 N2502-06-06-SS 6LF6316 ISSD6FE6
3/8"T X 1/2"NPT SFEI-6-8N SS-600-8-8 6FEL8N-316 CLF6-8N-S316 DLF-6-8N-S 770L _ 3/8 X 1/2 SS-6-DFE-8 N2502-06-08-SS 6LF8316 ISSD6FE8
3/8"T X 3/4"NPT SFEI-6-12N SS-600-8-12 6FEL12N-316 CLF6-12N-S316 DLF6-12N-S 770L _ 3/8 X 3/4 SS-6-DFE-12 N2502-06-12-SS 6LF12316 ISSD6FE12
1/2"T X 1/8"NPT SFEI-8-2N SS-810-8-2 8FEL2N-316 CLF8-2N-S316 DLF8-2N-S 770L _ 1/2 X 1/8 SS-8-DFE-2 N2502-08-02-SS 8LF2316 ISSD8FE2
1/2"T X 1/4"NPT SFEI-8-4N SS-810-8-4 8FEL4N-316 CLF8-4N-S316 DLF8-4N-S 770L _ 1/2 X 1/4 SS-8-DFE-4 N2502-08-04-SS 8LF4316 ISSD8FE4
1/2"T X 3/8"NPT SFEI-8-6N SS-810-8-6 8FEL6N-316 CLF8-6N-S316 DLF8-6N-S 770L _ 1/2 X 3/8 SS-8-DFE-6 N2502-08-06-SS 8LF6316 ISSD8FE6
1/2"T X 1/2"NPT SFEI-8-8N SS-810-8-8 8FEL8N-316 CLF8-8N-S316 DLF8-8N-S 770L _ 1/2 X 1/2 SS-8-DFE-8 N2502-08-08-SS 8LF8316 ISSD8FE8
1/2"T X 3/4" SFEI-8-12N SS-810-8-12 8FEL12N-316 CLF8-12N-S316 DLF8-12N-S 770L _ 1/2 X 3/4 SS-8-DFE-12 N2502-08-12-SS 8LF12316 ISSD8FE12
5/8"T X 3/8"NPT SFEI-10-6N SS-1010-8-6 10FEL6N-316 CLF10-6N-S316 DLF10-6N-S 770L _ 5/8 X 3/8 SS-10-DFE-6 N2502-10-06-SS 10LF6316 ISSD10FE6
5/8"T X 1/2"NPT SFEI-10-8N SS-1010-8-8 10FEL8N-316 CLF10-8N-S316 DLF10-8N-S 770L _ 5/8 X 1/2 SS-10-DFE-8 N2502-10-08-SS 10LF8316 ISSD10FE8
3/4"T X 1/2"NPT SFEI-12-8N SS-1210-8-8 12FEL8N-316 CLF12-8N-S316 DLF12-8N-S 770L _ 3/4 X 1/2 SS-12-DFE-8 N2502-12-08-SS 12LF8316 ISSD12FE8
3/4"T X 3/4"NPT SFEI-12-12N SS-1210-8-12 12FEL12N-316 CLF12-12N-S316 DLF12-12N-S 770L _ 3/4 X 3/4 SS-12-DFE-12 N2502-12-12-SS 12LF12316 ISSD12FE12
3/4"T X 1"NPT SFEI-12-16N SS-1210-8-16 12FEL16N-316 CLF12-16N-S316 DLF12-16N-S 770L _ 3/4 X 1 SS-12-DFE-16 N2502-12-16-SS 12LF16316 ISSD12FE16
1"T X 3/4"NPT SFEI-16-12N SS-1610-8-12 16FEL12N-316 CLF16-12N-S316 DLF16-12N-S 770L _ 1 X 3/4 SS-16-DFE-12 N2502-16-12-SS 16LF12316 ISSD16FE12
1"T X 1"NPT SFEI-16-16N SS-1610-8-16 16FEL16N-316 CLF16-16N-S316 DLF16-16N-S 770L _ 1 X 1 SS-16-DFE-16 N2502-16-16-SS 16LF16316 ISSD16FE16

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13823 Santa Fe Crossings Dr Edmond, OK 73013

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Toll Free: 1-844-200-MAKO (6256)


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