Hoke® Cross-Reference: Crestflo Interchange for Gyrolok® Tube Fittings & Hoke Instrumentation Valves

Reviewed by the Crestflo Engineering Team

Crestflo is an independent manufacturer. It isn't affiliated with, authorized by, sponsored by, or endorsed by Hoke Incorporated. Hoke®, Gyrolok®, Milli-Mite®, Flomite® and Uni-Chek® are trademarks belonging to that company. Every mention on this page is nominative, meaning we use these names only to identify the Hoke parts you already specify, so you can locate the dimensionally equivalent Crestflo component. What Crestflo supplies are independently manufactured interchange equivalents. They aren't genuine Hoke products.

What Hoke® fittings and valves are

Hoke® has built its name as an instrumentation brand. The line runs from Gyrolok® two-ferrule compression tube fittings through a full family of instrumentation valves: needle and metering (Milli-Mite®), ball (Flomite®), check (Uni-Chek®), bleed, plug, toggle, and multi-valve manifolds. These parts connect and control small-bore stainless and alloy tubing across analytical, process, hydraulic, and sampling systems.

Crestflo builds dimensional interchange equivalents for both halves of that line. Gyrolok two-ferrule fittings are qualified to ASTM F1387. Instrumentation valves are built to ASME B16.34 / API. Both come in 316/316L stainless, and the range extends all the way up to exotic high-nickel and corrosion-resistant alloys, with delivery running 6 to 8 weeks. Send in the Hoke or Gyrolok part numbers you're buying today, and Crestflo's Engineering Team will send back the interchange equivalent, the alloys it ships in, and a quote.

Scope: in this document, "Hoke" and "Gyrolok" refer specifically to instrumentation compression tube fittings and instrumentation valves, stainless and high-nickel-alloy fluid-system components. They don't cover plumbing compression fittings, electrical wire ferrules, or automotive parts.

Request your Hoke® cross-reference & quote → · Send in a print or a sample, and we'll pin down the equivalent for you.

Also known as: Hoke, Gyrolok®, Milli-Mite® and the terms buyers specify

Crestflo shows up on the Hoke line under a dozen different names. Trade names, series words, all sorts of search phrasings get thrown at it. Doesn't matter which one someone types in, the same Crestflo interchange comes back every time.

Hoke® interchange, explained: dimensional, form-fit-function equivalence

A Crestflo equivalent is a dimensional interchange, built form, fit and function to match. It's a complete Crestflo component made to the same tube OD, port geometry and connection, so it drops into the same location without any redesign. It isn't a repackaged OEM part, and Crestflo never represents it as genuine Hoke. For tube fittings, that equivalence rests on ASTM F1387, the performance qualification standard for mechanically attached fittings. For valves, the applicable ASME B16.34 / API valve standards govern instead. Part-number mapping has to be verified against your exact series, size and alloy, not guessed at. That's why Crestflo builds your cross-reference to order instead of publishing a generic parts table. It keeps every equivalent accurate to your bill of materials.

Hoke Gyrolok® tube-fitting interchange: 316 SS through exotic alloys

Gyrolok® is a two-ferrule compression tube fitting. It's built from a body, a nut, and front and back ferrules that bite into the tube OD as they're tightened, forming a gas-tight, mechanically gripped joint. Crestflo builds to that same two-ferrule geometry, single and double ferrule, hardened or non-hardened, across the common 1/4", 3/8" and 1/2" sizes and on up through 2" (50 mm) OD, covering both imperial and metric sizing. Connection and thread options match too: NPT, NPTF, BSPT, BSPP, ISO parallel, JIC 37°, SAE-ORB, tube-OD and socket/butt-weld ends are all available. What sets this apart from a stainless-only chart is alloy breadth. The same dimensionally equivalent fitting isn't limited to 316/316L; it's offered across exotic and corrosion-resistant alloys as well.

Alloy-availability matrix, Crestflo Gyrolok®-equivalent fittings

✓ means made-to-order in that alloy. Standard items ship from ready stock; specials are made to order, and delivery runs 6-8 weeks. We confirm the exact alloy for each part on your quote. Need fitting-by-fitting detail on the Gyrolok line? Check the dedicated Gyrolok cross-reference. For the product line itself, there's Crestflo compression tube fittings and nut & ferrule sets. Sizes from 1/4", 3/8", 1/2" and up are laid out in the tube fitting size chart. Alloy details live here: Hastelloy C-276, Super Duplex 2507, Inconel 625, Inconel 825, Monel 400, 254 SMO, Alloy 20 and 904L.

Hoke valve interchange: needle, ball, check, bleed and manifold equivalents

Crestflo interchanges the full Hoke valve line in 1/16", 1", with threaded or tube-fitting ends. These are built to the applicable ASME B16.34 / API 598 / API 602 valve standards, not the fitting standard. Every manifold gets 100% seat and shell leak testing. Each family maps to a Crestflo product below, and part-level equivalents come with your quote.

Every valve family comes in the same 316/316L-through-exotic-alloy range as the fittings: Monel, Inconel, Hastelloy, Duplex and more, all with heat-number traceability. Take a look at the full instrumentation valve line.

Standards & proof: ASTM F1387 for fittings, ASME B16.34 / API for valves

This isn't a marketing claim about the interchange. It rests on published standards, and those standards vary by product type:

• Tube fittings earn their qualification under ASTM F1387, the performance standard for mechanically attached fittings. It covers the dimensional and performance behavior that's the actual basis for equivalence.
• Valves, meanwhile, conform to ASME B16.34 along with whichever API valve standards apply: API 598, API 602, API 6D. That's the right basis for valve qualification, not F1387.

Interchange-proof summary

Values are per the applicable standard and customizable to requirement.

Cross-referencing Hoke against Swagelok® & Parker too

Buyers working from a mixed instrumentation bill of materials often need to cross Hoke against other brands in the same joint. Crestflo doesn't split its interchange guides by brand; it covers the whole category, so one supplier can answer the entire list. Check the Swagelok cross-reference, the Parker A-Lok cross-reference, the Hy-Lok cross-reference, the Fitok cross-reference, and the consolidated master interchange chart.

Request your Hoke cross-reference

Accurate mapping depends on your exact part, its size, and the alloy. That's why Crestflo builds your cross-reference to order, rather than publishing some invented parts table:

1. Send your Hoke / Gyrolok part numbers, a line-card export, a drawing, or a physical sample.
2. Tell us the alloy and size you need, or ask us to match what you run today.
3. We return the Crestflo equivalent, alloy availability, and quote, typically for delivery in 6–8 weeks.

Prefer paper? Ask the engineering team for your Hoke cross-reference as a formatted chart (PDF on request) when you send your part list. Crestflo builds the chart to your exact parts instead of publishing a generic parts table. That means every chart matches your bill of materials exactly.

Buyer paths: end users, MRO & EPC teams should request a quote or request a sample. Distributors can head to the line card, while OEMs will want the private-label program. Every route starts at the RFQ form.

RFQ form fields: Name, company name, email, phone, and a description of what you need.

Send your Hoke part list and get a same-spec interchange RFQ → · Or reach Crestflo directly: sales@crestflousa.com · +1 346 594 9005 · Houston, TX. Need datasheets or CAD files? We're happy to send them to customers on request.

Why buyers choose Crestflo for Hoke equivalents

Crestflo functions as the alloy-aware, standards-backed interchange for the Hoke line. Buyers don't switch for vague reasons. Each one is specific:

• Dimensional interchange applies to fittings and valves alike. Fittings are qualified to ASTM F1387; valves to ASME B16.34 and API. This isn't a marketplace guess.
• Stainless and exotic alloys both have a place here: Hastelloy, Super Duplex, Inconel, Monel, 254 SMO, Alloy 20. That's a range stainless-only charts don't lead with.
• 6–8 week delivery versus the long lead times common on specials from the majors.
• Heat/lot number on every part with EN 10204 3.1 MTC as standard; ISO 9001 / 14001 / 45001 & PED certified.
• Small MOQ, private-label and OEM programs.

Crestflo is the instrumentation arm of a four-decade, Government-of-India-recognized export house, with a Middle-East delivery record behind it. Manufacturing heritage runs deep here, channeled into a focused, US-serving instrumentation brand. Origin: Indian. US and European melt is available on request, with full material traceability, see the US origin & compliance position for details. We Engineer Confidence.

Trying to decide, not just find a supplier? Take a look at the honest side-by-side comparison at Hoke vs Crestflo. Or find out why Crestflo works as the Hoke alternative for US buyers.

FAQ

Related interchange guides

• All tube-fitting cross-references · Master interchange chart
• Gyrolok cross-reference, fitting-by-fitting interchange
• Hoke vs. Crestflo, compared · Why US buyers pick Crestflo over Hoke
• Swagelok, Parker A-Lok, Hy-Lok, and Fitok cross-reference guides
• ASTM F1387 interchange qualification · cross-reference and interchange lookup tool

Hoke®, Gyrolok®, Milli-Mite®, Flomite® and Uni-Chek® are trademarks belonging to Hoke Incorporated. Crestflo isn't affiliated with, authorized by, or endorsed by Hoke Incorporated; it operates as an independent manufacturer. These references are purely nominative, used only to identify parts that are equivalent. What Crestflo actually supplies are independently manufactured interchange equivalents. Parts originate in India, though US or European melt is available on request, with full material traceability included.