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Tube-to-Female Thread Fittings
DK-LOK Compression Tube Straight Fitting, 3/4" Tube OD x 3/4" Female NPT, SS316, DCF-12-12N-S
DK-LOK

DK-LOK Compression Tube Straight Fitting, 3/4" Tube OD x 3/4" Female NPT, SS316, DCF-12-12N-S

Mfr. part no.
DCF-12-12N-S
SKU
DK-VA36861212

Specifications

Connection Size (End 1) 3/4" Tube OD
Connection Size (End 2) 3/4" Female 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 DCF Series straight tube-to-female NPT fitting with a 3/4" compression tube end and a 3/4" female 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-1210-7-12

3/4" Tube OD x 3/4" Female NPT SS316 Straight Connector

Swagelok SS-1210-7-12 is a straight tube fitting connector with a 3/4" compression (double-ferrule) tube end and a 3/4" female NPT end, manufactured in 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 GCC oil & gas and petrochemical applications.

Specifications of the Swagelok part

Tube OD
3/4 in
Thread
3/4 in Female NPT
Material
SS316
Design
Double ferrule compression
End Connection 1
Compression tube
End Connection 2
Female NPT

Parker 12FSC12N-316

3/4" Tube OD x 3/4" Female NPT SS316 A-Lok Straight Connector

Parker A-Lok series straight connector with 3/4" compression tube end (double-ferrule) and 3/4" female NPT end, body in 316 stainless steel. The A-Lok two-ferrule design is dimensionally and functionally compatible with other major double-ferrule brands, making it a recognised like-for-like substitute in instrumentation tubing systems. Suitable for high-pressure process and instrumentation service.

Specifications of the Parker part

Tube OD
3/4 in
Thread
3/4 in Female NPT
Material
SS316
Design
Double ferrule (A-Lok)
End Connection 1
Compression tube
End Connection 2
Female NPT
Series
A-Lok

Hoke 12CF12316

3/4" Tube OD x 3/4" Female NPT SS316 Gyrolok Straight Connector

Hoke Gyrolok series straight tube fitting with 3/4" double-ferrule compression tube end and 3/4" female NPT end in 316 stainless steel. The Gyrolok design is a proven double-ferrule system used in instrumentation and process piping, offering leak-tight sealing and vibration resistance comparable to other major brands. Hoke is an Idex company and its fittings are accepted on many GCC project approved vendor lists.

Specifications of the Hoke part

Tube OD
3/4 in
Thread
3/4 in Female NPT
Material
SS316
Design
Double ferrule (Gyrolok)
End Connection 1
Compression tube
End Connection 2
Female NPT
Series
Gyrolok

Ham-Let 766L SS 3/4 X 3/4

3/4" Tube OD x 3/4" Female NPT SS316 Let-Lok Straight Connector

Ham-Let Let-Lok 766L series female connector with a 3/4" double-ferrule compression tube end and a 3/4" female NPT end in 316 stainless steel, listed in the Let-Lok catalogue as 766L SS 3/4 X 3/4 (tube O.D. 3/4" / 19.05 mm, NPT 3/4"). Let-Lok is a long-established double-ferrule design widely specified in oil and gas and petrochemical instrumentation. This cross-reference was matched on tube outside diameter, NPT size, thread gender, body material and ferrule arrangement. As with any two-ferrule design, components from different makes should not be intermixed; substitute the complete fitting.

Specifications of the Ham-Let part

Tube OD
3/4 in
Thread
3/4 in Female NPT
Material
SS316
Design
Double ferrule (Let-Lok)
End Connection 1
Compression tube
End Connection 2
Female NPT
Series
768LF

We carry DCF-12-12N-S as the indSpare-stocked equivalent. Looking for a different brand? Request a quote →

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