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Tube-to-Tube Fittings
DK-LOK Compression Tube Straight Reducing Fitting, 1/2" Tube OD x 1/4" Tube OD, SS316, DUR-8-4-S
DK-LOK

DK-LOK Compression Tube Straight Reducing Fitting, 1/2" Tube OD x 1/4" Tube OD, SS316, DUR-8-4-S

Mfr. part no.
DUR-8-4-S
SKU
DK-VA86860408

Specifications

Connection Size (End 1) 1/2" Tube OD
Connection Size (End 2) 1/4" Tube OD
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

Description

DK-LOK DUR Series straight reducing union fitting with a 1/2" tube end and a 1/4" tube end to connect different tube OD sizes. 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-810-6-4

Swagelok Tube Fitting — Reducing Union (Gaugeable Tube Fittings and Adapter Fittings, MS-01-140)

Swagelok SS-810-6-4 — 316 stainless steel reducing union, 1/2 in. x 1/4 in. tube OD. Direct equivalent of DK-LOK DUR-8-4-S.

FITOK SS-U-FL8-FL4

FITOK 6D Series Tube Fittings — Reducing Union (fitting code U with two different end sizes)

FITOK SS-U-FL8-FL4 — 316 stainless steel reducing union, 1/2 in. x 1/4 in. tube OD. Direct equivalent of DK-LOK DUR-8-4-S.

Hy-Lok CUR-8-4-S316

Hy-Lok Tube Fittings — Reducing Union, type designator CUR (catalogue H-200TF, Jan 2020)

Hy-Lok CUR-8-4-S316 — 316 stainless steel reducing union complete with nuts and ferrules, 1/2 in. x 1/4 in. tube OD. Direct equivalent of DK-LOK DUR-8-4-S.

We carry DUR-8-4-S as the indSpare-stocked equivalent. Looking for a different brand? Request a quote →

Browse every published equivalence

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