316/316L Stainless Steel Seamless Tubing 3/8 in OD 0.065 in Wall

In this review the FITOK 316/316L stainless steel seamless tubing is evaluated for users who need short, straight lengths of corrosion-resistant tubing for demanding fluid systems. The bottom line: this three-piece pack of 80 in annealed, mechanically polished tubing is best for engineers and technicians who require high strength seamless tubing with close dimensional control for leak-tight compression fittings. The review concentrates on material quality, finish, and suitability for critical environments rather than general-purpose plumbing.

Key Features

• Quality material: Dual certified 316/316L stainless offers enhanced corrosion resistance and good formability for harsh environments.
• Seamless construction: Being seamless and annealed means the tubing withstands higher pressure and can be flared without splitting.
• Precision tolerances: Close outside diameter and ovality control deliver reliable, leak-tight connections with compression tube fittings.
• Surface finish: Mechanical polishing produces a smooth internal and external surface that helps reduce contamination and eases assembly.
• Controlled hardness: Maximum hardness of 80 HRB is maintained to ensure consistent mechanical performance and maintainability.
• Fit for fittings: Dimension control and finish make the tubing compatible with precision compression fittings used in instrumentation and process systems.

Who It's For

This tubing is aimed at professionals in oil and gas, chemical, power, healthcare, and food processing sectors who need short, straight lengths of dependable stainless steel tubing for instrumentation, sample lines, or mechanical parts. It suits machinists and fabricators who value a polished, annealed tube that can be flared and welded where required.

Those looking for decorative plumbing, flexible hose replacements, or very long continuous runs should consider alternatives; this product is sold as three 80 in straight lengths and is optimized for precision fluid systems rather than general-purpose home use.

Pros & Cons

Pros

• High grade 316/316L material provides excellent corrosion resistance for aggressive media.
• Seamless and annealed construction gives superior pressure tolerance and flareability compared with welded tubing.
• Mechanical polish and tight OD/ovality tolerances ensure reliable, leak-tight fittings.
• Manufactured to FITOK standards that exceed ASTM A269 for consistent quality.

Cons

• Sold as fixed 80 in straight lengths, which may be inconvenient for applications needing shorter pre-cut sizes.
• Not intended as a flexible hose alternative; it is rigid tubing for static or semi-permanent installation.

Specifications

Material	316/316L stainless steel (dual certified)
Construction	Seamless, annealed
Outside diameter	3/8 in
Wall thickness	0.065 in
Length	80 in per piece (3 pieces)
Finish	Mechanically polished
Hardness	Maximum 80 HRB

Our Verdict

The FITOK 316/316L seamless tubing is a solid choice for professionals who need precision stainless tubing with strong pressure capacity and excellent corrosion resistance. Its polished finish, controlled hardness, and tight dimensional tolerances make it good value for instrumentation and harsh-environment fluid systems, provided the fixed 80 in lengths match the project needs.

Frequently Asked Questions

Is this tubing suitable for flaring?
Yes. The tubing is seamless and annealed so it can be flared without splitting when formed correctly.

Can this be used with compression tube fittings?
Yes. Close OD and ovality tolerances plus smooth surfaces are intended to provide leak-tight connections with compression fittings.

Is the tubing ready for sanitary food processing use?
The 316/316L material and mechanical polish are commonly used in food processing, but verify finish and cleaning requirements for your specific sanitary standards.