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Tube-to-Male Thread Fittings
DK-LOK Compression Tube Straight Fitting, 1/2" Tube OD x 3/8" Male NPT, SS316, DMC-8-6N-S
DK-LOK

DK-LOK Compression Tube Straight Fitting, 1/2" Tube OD x 3/8" Male NPT, SS316, DMC-8-6N-S

Mfr. part no.
DMC-8-6N-S
SKU
DK-VA34860608

Specifications

Connection Size (End 1) 1/2" Tube OD
Connection Size (End 2) 3/8" Male NPT
Body Material 316 stainless steel
Ferrule Design Double ferrule (front & back ferrules)

Key Features

  • Double-ferrule design (front & back ferrules) for secure tube grip and leak-tight sealing
  • SS316 stainless steel body, nut and ferrules for corrosion resistance
  • Straight-body configuration for clean, compact routing
  • Threaded end for easy transition between tubing and NPT pipe thread

Description

DK-LOK DMC Series straight tube-to-male NPT fitting with a 1/2" compression tube end and a 3/8" male NPT threaded end. Manufactured from SS316 stainless steel with a proven double ferrule design (front and back ferrules) to provide a strong grip, vibration resistance, and leak‑tight sealing in instrumentation and process tubing systems. Suitable for high-pressure service when installed per Dk-lok tube fitting make-up instructions.

Applications

  • Instrumentation and control lines
  • Hydraulic and pneumatic tubing systems
  • Process and utility piping interface (tube to NPT where applicable)
  • General industrial fluid & gas service

Documents

  • DK Lok Compression Tube Fittings — Catalog

    PDF, 6.2 MB

Cross-reference

The closest equivalents from other brands, with the differences stated so you can check before you order.

Swagelok SS-810-1-6

1/2" OD Tube x 3/8" Male NPT Straight Connector, SS316

Swagelok SS-810-1-6 is a straight tube fitting connector with a 1/2" compression (double ferrule) tube end and a 3/8" male NPT threaded end, manufactured from 316 stainless steel. It uses Swagelok's industry-standard two-ferrule bite-type design providing leak-tight, vibration-resistant connections in instrumentation and process systems. Widely accepted as the benchmark double-ferrule fitting in oil & gas and petrochemical applications.

Specifications of the Swagelok part

Tube OD
1/2 inch
Thread
3/8 inch Male NPT
Material
SS316
Design
Double ferrule compression
Pressure Rating
Up to 5000 psig (1/2" SS tube)
End Connection 1
Compression tube
End Connection 2
Male NPT

Hy-Lok CMC-8-6N-S316

1/2" OD Tube x 3/8" Male NPT Straight Connector, SS316

Hy-Lok C series straight compression fitting with 1/2" tube OD double-ferrule end and 3/8" male NPT end, manufactured in 316 stainless steel. Hy-Lok's two-ferrule design is dimensionally and functionally interchangeable with DK-LOK, Swagelok, and Parker A-Lok fittings. Commonly used in instrumentation and process piping throughout the GCC and Asia-Pacific regions.

Specifications of the Hy-Lok part

Tube OD
1/2 inch
Thread
3/8 inch Male NPT
Material
SS316
Design
Double ferrule compression
Series
C series
End Connection 1
Compression tube
End Connection 2
Male NPT

Parker 8MSC6N-316

1/2" OD Tube x 3/8" Male NPT Straight Connector, SS316 A-Lok

Parker A-Lok series FTBNS straight connector with 1/2" compression tube end and 3/8" male NPT end, in 316 stainless steel. Uses Parker's two-ferrule (front and back) bite-type compression design, providing equivalent grip and sealing performance to DK-LOK and Swagelok fittings. Suitable for instrumentation, hydraulic, and process tubing applications.

Specifications of the Parker part

Tube OD
1/2 inch
Thread
3/8 inch Male NPT
Material
SS316
Design
Double ferrule compression (A-Lok)
Series
A-Lok FTBNS
End Connection 1
Compression tube
End Connection 2
Male NPT

Fitok SS-CM-FL8-NS6

1/2" OD Tube x 3/8" Male NPT Straight Connector, SS316

Fitok MC series straight double-ferrule compression fitting with 1/2" tube OD end and 3/8" male NPT end in 316 stainless steel. Fitok is a recognised instrumentation fitting manufacturer with ISO-certified production, and their MC series is designed to be dimensionally interchangeable with Swagelok and DK-LOK equivalents. Commonly specified in cost-sensitive GCC instrumentation projects.

Specifications of the Fitok part

Tube OD
1/2 inch
Thread
3/8 inch Male NPT
Material
SS316
Design
Double ferrule compression
Series
MC series
End Connection 1
Compression tube
End Connection 2
Male NPT

Gyrolok (Hoke) 8CM6316

1/2" OD Tube x 3/8" Male NPT Straight Connector, SS316

Hoke Gyrolok 4C4BX6 straight fitting with 1/2" double-ferrule compression tube end and 3/8" male NPT end in 316 stainless steel. Gyrolok fittings use a two-ferrule design and are a recognised alternative to Swagelok and DK-LOK in instrumentation applications. Hoke/Gyrolok is an ITT brand with broad acceptance in process industries.

Specifications of the Gyrolok (Hoke) part

Tube OD
1/2 inch
Thread
3/8 inch Male NPT
Material
SS316
Design
Double ferrule compression (Gyrolok)
End Connection 1
Compression tube
End Connection 2
Male NPT

We carry DMC-8-6N-S as the indSpare-stocked equivalent. Looking for a different brand? Request a quote →

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