Instrumentation Tube Fitting Cross-Reference: Master Interchange Chart (All Brands → Crestflo)

Reviewed by the Crestflo Engineering Team

Trademark and independence notice: every brand name that appears on this page, including Swagelok®, Parker®, A-Lok®, CPI™, GyroLok®, Hy-Lok®, Hoke®, Fitok®, DK-Lok®, Ham-Let®, Superlok®, Tylok®, SSP® and Brennan®, is a trademark of its respective owner. Crestflo has no affiliation with any of them. It isn't authorized, sponsored or endorsed by a single one. We mention these names for one reason only: so you can match the part you already specify to a dimensionally equivalent Crestflo fitting. That's what "nominative" use means here. Nothing more. Crestflo builds its own equivalents, manufactured independently. They aren't genuine OEM parts, and we don't pretend otherwise.

A master interchange chart is one multi-brand table, nothing more, that lines up every major instrumentation tube-fitting series against its dimensionally interchangeable Crestflo equivalent. Hold a competitor's fitting in your hand, and this chart tells you which Crestflo part is a form-fit-function replacement, qualified for performance under ASTM F1387 and made in stainless as well as exotic alloys. It's the consolidated hub: scan all thirteen brands in one spot, then move to the per-brand cross-reference page and, from there, an RFQ.

Request your cross-reference & quote → · Send over a part list, a line-card export, a print, or just a sample. The Crestflo Engineering Team sends back the interchange equivalent, the alloys it ships in, and a quote.

Scope: this document covers instrumentation tube fittings: precision single- and double-ferrule compression fittings built for gas and liquid instrument lines, process-analyzer lines, and hydraulic-instrument lines, in stainless and high-nickel/CRA alloys. It isn't a cross-reference for hydraulic hose, JIC hose adapters, SAE-ORB adapters, or plumbing fittings, though 37° JIC-flare and SAE-ORB end variants get a mention wherever they apply. "Ferrule" here means a fluid-system compression ferrule, not a wire ferrule.

Also known as: interchange chart, equivalent table, x-ref & conversion terms

Buyers phrase this request in a dozen different ways, but they all land on the same instrumentation interchange. This chart also goes by tube fitting cross reference (or cross-reference, crossreference, cross ref, x-ref), tube fitting interchange chart, interchange table or interchange lookup, tube fitting equivalent chart, fitting comparison chart, tube fitting brand comparison or fitting manufacturer comparison, multi-brand fitting equivalent, master interchange list or master chart, and replacement, alternative, or substitute fitting guide. Flip the word order and you still end up here: fitting cross reference tube, cross reference chart tube fitting. Both point to this page.

Within instrumentation specifically, people also search instrumentation fitting cross reference, compression fitting cross reference, double-ferrule fitting cross reference, single-ferrule fitting cross reference, stainless steel tube fitting cross reference, and exotic-alloy tube fitting cross reference. No matter which phrasing brings the request to your desk, the answer underneath stays the same: the Crestflo fitting that dimensionally interchanges with the brand fitting sitting on your bill of materials.

Master interchange chart: every brand mapped to a Crestflo equivalent

The chart below matches each major instrumentation tube-fitting family to its Crestflo dimensional equivalent, sorted by geometry and size system, and it links to the per-brand page carrying the alloy, ferrule and connection-parity detail for that line. An accurate part-number map has to be checked against your exact series, size and material. That's why Crestflo builds your cross-reference to order rather than publishing an unverified generic parts table, so every equivalent matches your bill of materials. Use the Request your cross-reference path for the verified part-for-part mapping.

A Parker cross reference can point to either the A-Lok (double-ferrule) line or the CPI (single-ferrule) line. Start from whichever family you buy today, or just send your part numbers and the Engineering Team will identify it for you. For side-by-side positioning, the Swagelok vs Crestflo, Hy-Lok vs Crestflo and FITOK vs Crestflo comparisons go deeper, while the swagelok alternative page tackles second-sourcing head-on.

How instrumentation tube-fitting interchange works: and what "equivalent" means

Dimensional interchange means a Crestflo fitting mates to the same tube outside diameter, threads onto the same end connections, and delivers equivalent form, fit and function to the referenced brand design. Ferrule geometry, nut thread, hex, and gland or body port all match the original, right down to the last dimension. Crestflo builds to the single- and double-ferrule geometry and the imperial-and-metric sizing conventions the major brands use. That's what makes a location-for-location swap possible.

Crestflo doesn't stop at a size spreadsheet. Its compression tube fittings are tested to ASTM F1387, the Standard Specification for Performance of Piping and Tubing Mechanically Attached Fittings, which gives the company a documented, qualified interchange claim instead of a loose marketplace "equivalent." Competitor charts, for the most part, just list dimensions with no performance basis behind them. The ASTM F1387 interchange qualification, by contrast, is the actual proof standing behind these mappings.

The engineering distinction here needs to be precise. Interchange means swapping out a complete brand fitting for a complete Crestflo fitting at one location: body, nut, and both ferrules, all Crestflo. Intermixing is something else entirely: combining a Crestflo ferrule or nut with another maker's body inside a single joint. That isn't interchange, and it isn't recommended, since ferrule geometry and hardness are engineered as a matched set. Crestflo sticks to "interchange" and "equivalent" in its terminology; it never says "compatible" or "intermix." See single vs double ferrule and mixing tube fitting brands.

Interchange in 316 stainless AND exotic alloys: the differentiator

Most incumbent cross-reference charts stop at 316 stainless or brass. Crestflo goes further: its interchange advantage comes down to alloy breadth. The same dimensionally equivalent fitting ships in 304/316/904L, in the full corrosion-resistant and nickel-alloy range, and in Titanium Gr2. Those are the materials instrumentation buyers actually specify for sour service, high-chloride conditions and high-temperature applications.

Each alloy's material page covers the grade in detail. The fitting itself ships ready as an instrumentation form.

UNS numbers are standard published designations. Alloys ship per the applicable material standard and can be adjusted to your requirement; we'll confirm each part's alloy on your quote. Sizing runs from imperial fractional and metric (3-50 mm) up to 2″ (50 mm) OD, in single or double ferrule, hardened or non-hardened. Take a look at 316/316L, Super Duplex 2507, Inconel 625, Monel 400 and Hastelloy C-276. You can also browse metric tube-fitting equivalents, or reach for the alloy selector and the sour-service (NACE) selection guide.

Certification & traceability behind every interchange equivalent

An interchange claim is only as strong as the proof behind it. Crestflo tests each fitting against the standard that actually applies to it, and every part ships with full traceability.

Datasheets and CAD drawings are available to customers on request. For full certificate detail, see the traceability and US-origin & compliance pages. The EN 10204 MTC standard page walks through the 3.1/3.2 distinction.

Interactive part-number lookup & the request-your-cross-reference path

When you need an exact part number, two paths get you there. The interactive cross-reference lookup tool lets you search by a competitor's part number or by size: a 1/4″ or 6 mm OD, a series, or a full part number. From there, the part-number configurator builds the matching ordering code. Want a verified mapping, checked by an engineer? Request your cross-reference: send in a part list, a print, or a sample. The Crestflo Engineering Team will return the Crestflo equivalent, its alloy availability, and a quote, mapped to your actual bill of materials, not pulled from some generic table.

Why source your interchange from Crestflo

Crestflo is the interchange built around alloy awareness and backed by F1387, and buyers second-source it for specific, concrete reasons.

Crestflo is the instrumentation division of a four-decade, Government-of-India-recognized export house with a track record of delivery across the Middle East. Decades of manufacturing experience sit behind this US-focused instrumentation brand. Origin: Indian, though US and European melt is available on request, with full material traceability. QA is certified to ISO 9001, 14001, and 45001, plus PED. The fitting approvals that apply to this product type, ASTM F1387 and NACE MR0175 / ISO 15156, are already held. We Engineer Confidence.

Buyer paths: Distributors start with the line card / distributor program. OEMs head to the private-label program. If you're an equipment manufacturer, send a print for made-to-print interchange. End users, MRO and EPC buyers: request a quote or a sample. One starting point for all of it: the RFQ form.

Scope: what this master chart is not

This chart covers one thing only: instrumentation compression tube fittings mapped to Crestflo. It won't help with hydraulic hose, JIC hose-adapter, SAE-ORB adapter, or plumbing/tube-adapter cross-references. Searches like "hydraulic fitting cross reference," "Aeroquip cross reference," and "Adaptall cross reference" fall under that hydraulic-adapter category, a separate product family entirely. Nor is this a competitor-to-competitor chart. A request such as "Parker to Brennan cross reference" falls outside its scope, since every mapping here ends at a Crestflo equivalent. For the instrumentation lines named above, the Crestflo Engineering Team will return a verified interchange on request.

Legal, trademark & non-affiliation

Crestflo doesn't claim any affiliation with, authorization from, sponsorship by, or endorsement from any manufacturer named here. Every brand mentioned is a trademark of its respective owner, cited only to identify the parts you already specify, that's a nominative use, nothing more. The parts Crestflo sells are Crestflo-manufactured, not OEM.

Any claim of interchange rests on dimensional and performance grounds under ASTM F1387, and those claims are factual. They don't mean parts can be mixed within a single fitting assembly, though. You won't find Crestflo calling its equivalents "compatible," "intermix," "genuine," or "OEM", the company avoids those words on purpose.

FAQ

Send your BOM: get a Crestflo cross-reference

Send over your competitor part list, a line-card export, a drawing, or a sample. The Crestflo Engineering Team sends back the Crestflo interchange equivalent, the alloys it ships in, and a quote, and there's no login and no gated tool standing in the way.

The RFQ form asks for five things: name, company name, email, phone number and a description of the requirement.

Request your cross-reference & quote → · Request a sample · Distributor line card · Or just reach out to Crestflo directly: sales@crestflousa.com · +1 346 594 9005 · Houston, TX.

Related resources

• Cross-reference & interchange hub · Cross-reference lookup tool
• Single vs double ferrule · Mixing tube fitting brands
• Instrumentation tube fittings · Metric tube fittings · Nut & ferrule sets
• ASTM F1387 · NACE MR0175 · EN 10204 MTC
• Instrumentation fitting materials · Alloy selector

Every brand name mentioned belongs to its respective owner and appears here only to identify the equivalent part it matches. Crestflo isn't affiliated with, authorized by, or endorsed by any of these manufacturers. What we supply are independently manufactured parts built to the same dimensions. Origin: India. US and European melt is available on request, and full material traceability comes with it.