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Stainless Steel Duolok Tube Fitting, 0.38 Inch Tube OD To 3/4-16 Male SAE O-Ring Boss (Straight Thread O-Ring), 90 deg Elbow

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Description & Features

SSP Duolok stainless tube fittings offer reliability and leak-proof connections in instrumentation and process tubing systems. Manufactured from type 316 stainless steel these fittings conform to ASTM A-276 and ASTM A-479 for straight fittings and ASTM A-182 for shaped bodies.

The double ferrule design of Duolok fittings ensures compensation for variations in tubing materials hardness and wall thickness providing leak-tight connections across various applications. These fittings are designed to be gaugeable ensuring sufficient pull-up during initial installation.

Designed for broad interchangeability Duolok fittings are compatible with Swagelok brand tube fittings. The fittings support high-pressure ratings aligning with the maximum allowable pressures of recommended stainless steel tubing though some specially designed fittings may have lower ratings.

Functioning reliably across an extensive range of operating temperatures elevated temperatures may reduce the maximum working pressure capabilities. Certified material test reports (CMTRs) are available for all components.

Supplier Part Number: ISSD6MEST8

Specifications

Brand
SSP
Connection Size 1
3/8 in
Connection Size 2
1/2 in
Connection Type
Male SAE Threaded, Tube
Connection Type 1
Tube
Connection Type 2
Male SAE Threaded
Fitting Type
90 deg Elbow
Hex Size
11/16 x 7/8 in
Material
Stainless Steel
Material Construction
316 Stainless Steel
Series
MEST Series
Sg Gageability
Duolok® Tube Fittings are Designed, Manufactured and Quality Controlled to be Gaugeable for Sufficient Pull-up During Initial Installation
Sg Interchangeability
Duolok® Tube Fittings are Designed, Manufactured and Quality Controlled to be Totally Interchangeable with the Swagelok® Brand of Tube Fittings
Sg Pressure Rating
Generally, Duolok® Tube Fittings are Rated for Pressures Equal to the Maximum Allowable Working Pressures of the Tubing Recommended for Use with the Fittings (Stainless Steel Tubing), Some Specially Designed Fittings, Bored-through Fittings, an Fittings,
Sg Temperature Factors
Duolok® Tube Fittings Function Reliably in an Extremely Wide Range of Operating Temperatures, Elevated Temperatures will Reduce the Maximum Working Pressure Capability of the Tubing System, for Applications at Elevated Temperatures
Thread Size
3/4-16
Tube OD
3/8 in

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Product Questions & Answers (1)

Question by: Danny P on Jan 2, 2026, 2:35 PM
these duolok fittings interchangeable with swagelok stuff? got a panel we're trying to tie into and don't want to pull everything apart if we can help it
Answer by: Customer Support on Jan 4, 2026, 6:05 AM
Duolok fittings are built to be fully interchangeable with Swagelok brand tube fittings, so you should be able to work right into an existing Swagelok setup without having to tear the whole panel out. SSP manufactures them to the same dimensional standards, which is the whole point of that compatibility design.

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