Griplok® Tube Fitting Cross-Reference: Crestflo Interchange Equivalents in Stainless AND Exotic Alloys

Reviewed by the Crestflo Engineering Team

> Trademark & independence notice: "Griplok®" is a trademark of SSP Fittings Corp. Crestflo is not affiliated with, authorized by, sponsored by, or endorsed by SSP Fittings Corp. Every reference on this page is nominative, used only to identify the parts you already run so you can find the dimensionally equivalent Crestflo part. All claims are factual and dimensional. Crestflo supplies independently manufactured equivalents, not genuine Griplok products.

Crestflo manufactures dimensional equivalents to Griplok® twin-ferrule instrumentation tube fittings, small-bore compression fittings whose interchange is qualified to ASTM F1387, in 316/316L stainless and exotic alloys including Hastelloy, Super Duplex, Inconel, and Monel, with 6–8 week delivery. Crestflo cross-references 119 Griplok instrumentation tube-fitting part numbers to Crestflo equivalents today. Send us the Griplok part numbers you buy now and we return the interchange equivalent, the alloys it ships in, and a quote.

Request your Griplok cross-reference & quote → · Send a part list, a print, or a sample, the Crestflo Engineering Team identifies the equivalent for you.

Scope: this cross-reference is for instrumentation twin-ferrule tube fittings in stainless steel and alloy, not hydraulic/JIC, plumbing compression, or electrical ferrules. Here "ferrule" means a fluid-system compression ferrule, not a wire ferrule, and "compression fitting" means an instrumentation SS/alloy tube fitting, not a copper/plumbing one.

What Griplok tube fittings are

Griplok® tube fittings are twin-ferrule (dual-ferrule) instrumentation compression fittings that seal small-bore stainless and alloy tubing in analytical, process, and instrument lines. A complete Griplok fitting is a body, a nut, a front ferrule, and a back (rear) ferrule; pulling the nut up advances the two ferrules onto the tube OD to make a gas-tight, mechanically gripped joint that holds under pressure, vibration, and thermal cycling. Griplok® is a product line of SSP Fittings Corp. (SSP Corporation) of Twinsburg, Ohio, a US instrumentation fitting manufacturer, and Griplok is designed to interchange with the Hoke® Gyrolok® family. Crestflo builds to the same twin-ferrule geometry and the same imperial and metric size conventions, which is what makes a location-for-location swap possible.

Because the Griplok range and the Crestflo range share the same twin-ferrule envelope, a Griplok part maps cleanly to a Crestflo part. Griplok part numbers carry a "G" prefix; the Crestflo equivalent carries a "C". For example, Griplok G1MC1 interchanges with Crestflo CMC 1-1N, G2MC1 with CMC 2-1N, and G1MC2 with CMC 1-2N. The full verified interchange, all 119 Griplok part numbers mapped to their Crestflo equivalents, is available through the cross-reference lookup tool; the naming logic above is only an illustration of the pattern.

Griplok designations this cross-reference also covers

Griplok buyers write the brand and the interchange in many forms, and every one of them points to the same Crestflo interchange.

Griplok interchange attributes: how the equivalent is defined

A cross-reference answers one question: for the Griplok part I buy today, what is the Crestflo part that dimensionally interchanges, and in which alloys? Because part-number mapping must be verified against your exact series, size, and material rather than guessed, Crestflo confirms every equivalent against your bill of materials rather than asking you to trust a generic table. That keeps every interchange accurate to what you actually run.

Griplok-to-Crestflo interchange attribute set

Values per applicable standard; customizable to requirement. Per-part alloy and size confirmation is provided with your quote.

Griplok part number cross reference: how to request it

Send us the Griplok part numbers, a line-card export, a drawing, or a physical sample. The Crestflo Engineering Team returns the interchange equivalent, the ferrule and connection parity notes, the available alloys, and a quote, no login, no gated tool.

Request your Griplok® cross-reference →

Griplok cross reference chart / PDF: what you get instead

Where competitors bury interchange data in gated tools or un-searchable PDFs, Crestflo returns your chart as a clean, verified document tied to your actual part list. Ask for it through the request-a-quote form or by emailing sales@crestflousa.com. You can also open the cross-reference lookup tool to start a request, or browse the full tube-fitting cross-reference hub.

Griplok product families cross-referenced: fittings & ferrules

Crestflo equals the Griplok instrumentation tube-fitting catalog family for family, each mapping to a Crestflo product line.

Griplok is an instrumentation tube-fitting line; it is not a valve brand. If you are also consolidating instrumentation valves onto a single second source, Crestflo builds needle, ball, check, and manifold valves alongside these fittings, see the broader tube-fitting range and the full cross-reference hub.

Griplok equivalents in stainless AND exotic alloys: the Crestflo wedge

This is where Crestflo separates from stainless-only cross-references: the same dimensionally equivalent fitting is available not just in 316 SS but across exotic and corrosion-resistant alloys that a stock instrumentation-fitting range does not lead with. Griplok's own catalog centers on 316 stainless, Alloy 400, C-276, and brass; Crestflo widens that to a full corrosion-resistant-alloy menu. Availability is by fitting type and alloy; per-part confirmation comes with your quote.

Alloy-availability matrix, Crestflo Griplok-equivalent fittings

✓ = available / made-to-order in that alloy. Ready stock for standard items · made-to-order for specials · 6–8 week delivery.

Griplok fitting in Hastelloy C-276

For wet-chlorine, sulfuric, and mixed-acid service, Crestflo equals the Griplok part in Hastelloy C-276 / C-22, a step beyond the C-276 that Griplok's stock range offers, with the same twin-ferrule geometry. See the Hastelloy C-276 material page.

Griplok fitting in Super Duplex 2507 & Duplex 2205

For high-chloride and offshore seawater duty, the equivalent is available in Super Duplex 2507 and Duplex 2205. See the Super Duplex 2507 and Duplex 2205 material pages.

Griplok fitting in Inconel 625 / Inconel 825 & Monel 400

For high-temperature, sour-gas, and hydrofluoric service, Crestflo equals it in Inconel 625, Inconel 825, and Monel 400 (Alloy 400). See the Inconel 625, Inconel 825, and Monel 400 material pages.

Griplok fitting in 254 SMO, Alloy 20 & 904L

For sulfuric-acid and high-chloride process lines, Crestflo also supplies the equivalent in 254 SMO, Alloy 20, and 904L, see the 254 SMO, Alloy 20, and 904L material pages. Default material is 316/316L, see the 316/316L material page.

Is Griplok interchangeable? Interchange vs. intermix

This is the question every specifying engineer should ask, and the honest answer earns trust:

• Interchange (correct): replace a complete Griplok fitting with a complete Crestflo fitting at the same location. Body, nut, and both ferrules are Crestflo. This is what "Griplok equivalent" and "drop-in replacement" mean here.
• Intermix (do not do this): mixing a Crestflo ferrule or nut with a Griplok body, or vice versa, inside a single joint. Twin-ferrule geometry and hardness are engineered as a set; mixing components across brands within one joint can compromise the seal and is not what "interchange" means.

Griplok is itself designed to interchange with the Hoke® Gyrolok® system, and buyers often ask whether Griplok, Gyrolok, and Swagelok parts interchange. The precise, safe answer is the same for every brand: use complete fittings of one brand as interchange equivalents; validate the specific part; and do not intermix components across brands within a joint. If your reference brand is actually Gyrolok or Swagelok, start from the Gyrolok cross-reference or the master interchange chart. Crestflo publishes F1387-qualified equivalents across the category.

Why the interchange is proven: ASTM F1387

The interchange claim is not a marketing assertion, it rests on a published standard. Crestflo compression tube fittings are qualified to ASTM F1387, the performance qualification for mechanically attached (compression tube) fittings, covering the dimensional and performance behavior that is the basis for equivalence, proof, burst, impulse, vibration, rotary flex, and pull-out. That documented rigor is exactly what separates a qualified equivalent from an uncontrolled marketplace "equivalent" with no proof or traceability.

Interchange-proof summary

Read more on the ASTM F1387 interchange qualification, and see how traceability and testing back every part. Values per applicable standard; customizable to requirement.

How to request your Griplok cross-reference

1. Send your Griplok part numbers, a line-card export, a drawing, or a 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.

Buyer paths: distributors → line-card / stocking program · equipment manufacturers → send a print for made-to-print interchange · OEMs → private-label program · end users, MRO & EPC → RFQ or sample. All routes start at the RFQ form.

RFQ form fields: Name · Company name · Email · Phone · Requirement description.

Request your Griplok® cross-reference & quote → · Or request a sample: sales@crestflousa.com · +1 346 594 9005 · Houston, TX.

Why buyers switch to Crestflo

Crestflo is the alloy-aware, standards-backed alternative to Griplok, and the reasons buyers move are specific:

• Drop-in interchange, dimensionally equal and qualified to ASTM F1387, not a marketplace guess. All 119 Griplok part numbers map to a verified Crestflo equivalent.
• Stainless AND exotic alloys, Hastelloy, Super Duplex, Inconel, Monel, 254 SMO, Alloy 20, a range a stock catalog does not lead with.
• 6–8 week delivery on made-to-order specials, versus the long lead times common on the majors.
• Cost-competitive even after US duties/tariffs.
• Small MOQ and private-label / OEM programs, with a stated 6–8 week lead time.
• Heat/lot number on every part with EN 10204 3.1 MTC as standard (3.2 on request).
• ISO 9001 / 14001 / 45001 & PED certified.

Crestflo is the instrumentation division of a four-decade, Government-of-India-recognized export house with a Middle-East delivery track record, established manufacturing heritage behind a focused US-serving instrumentation brand. Origin: Indian origin; US / European melt available on request, with full material traceability, see the US-origin & compliance page. We Engineer Confidence.

Explore the underlying product line: Crestflo tube fittings and the full cross-reference hub.

FAQ

Other brand tube-fitting cross-references

Not a Griplok user? Crestflo publishes interchange guides across the instrumentation category:

• SSP cross-reference
• Swagelok cross-reference
• Parker A-Lok cross-reference
• Hy-Lok cross-reference
• Hoke / Gyrolok cross-reference
• All brand interchange guides · Master interchange chart

Griplok® is a trademark of SSP Fittings Corp. Crestflo is not affiliated with, authorized by, or endorsed by SSP Fittings Corp. All references are nominative and used only to identify equivalent parts. Crestflo supplies independently manufactured dimensional equivalents. Origin: Indian origin; US / European melt available on request, with full material traceability.