Brennan® Fittings Cross-Reference: Stainless & Alloy Interchange (JIC 37°, DIN 2353, SAE 45°, NPT/BSPP)

Reviewed by the Crestflo Engineering Team

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

What a Brennan cross-reference is

A Brennan cross-reference is a mapping from a Brennan® fitting to a dimensionally equivalent fitting you can install in its place, matched by SAE dash size, thread form, and seat or cone angle. Here, that equivalent is a Crestflo fitting in stainless steel or a corrosion-resistant alloy, manufactured to the same connection standards and qualified for interchange under ASTM F1387. Send the Brennan part numbers you run today and the Crestflo Engineering Team returns the interchange equivalent, the alloys it ships in, and a quote.

Request your Brennan® cross-reference & quote → · Send a part list, a print, or a sample, we identify the equivalent for you.

Scope: Brennan Industries is a hydraulic and pneumatic fitting/adapter manufacturer; Crestflo builds instrumentation-grade fluid-system fittings. This interchange covers the connection families where the two lines dimensionally overlap, JIC 37° flare, SAE 45° flare, DIN 2353 metric bite-type, and NPT/BSPP pipe-thread adapters, in stainless and alloy only, not carbon-steel or zinc-plated commodity adapters.

Also specified as: Brennan interchange, equivalent & crossover designations

This interchange is also specified under the names and standard designations below, Brennan buyers reach the same Crestflo equivalent whether they call it a crossover, a replacement, or an equivalent, and whether they identify a fitting by its Brennan family or by its SAE/ISO/DIN standard.

Which Brennan fittings this cross-reference covers

Brennan Industries manufactures Brennan hydraulic fittings, pneumatic fittings, and adapters, JIC, SAE, ORFS, NPT, BSP, and DIN metric lines, plus Brennan tube fittings, largely in carbon steel, plated steel, and stainless. Used as a hydraulic fitting cross reference, this page overlaps that catalog with Crestflo's instrumentation product architecture on a defined subset, and it is honest about where the overlap ends.

Connection-family scope

Crestflo does not lead with carbon-steel or zinc-plated adapters; every equivalent below is a stainless or corrosion-resistant alloy part.

How a Brennan interchange is determined

An interchange is matched on three attributes, not on a reproduced part number:

• SAE dash size (or DIN L/S metric series), the nominal tube OD and end sizing. On the JIC 37° line that means matching the tube size to its UNF thread: a 1/4" JIC (−04), a 3/8" JIC on a 9/16-18 thread (−06), a 1/2" JIC on 3/4-16 (−08), then 7/8-14 (−10) and 1-1/16-12 (−12), and so on through the range.
• Thread form, UN/UNF straight thread for JIC and ORB, NPT/NPTF taper for pipe ends, BSPP parallel, or the metric thread of the DIN 2353 nut.
• Seat or cone angle, 37° for JIC (SAE J514 / ISO 8434-2), 45° for SAE flare, and the 24° cone of DIN 2353 bite-type (ISO 8434-1).

Match those three and the fitting occupies the same envelope and makes the same seal. Crestflo builds to the published SAE, ISO, and DIN geometries, values per applicable standard, customizable to requirement, which is what makes a location-for-location swap possible. Because a Brennan-to-Crestflo part-number mapping has to be verified against your exact family, size, and material rather than guessed, Crestflo builds your cross-reference to order rather than publishing a generic parts table, so every equivalent stays accurate to your bill of materials. For the underlying connection engineering, see JIC vs DIN 2353, JIC vs ORB, and NPT vs BSP.

Requesting your Brennan part number cross-reference

Send the Brennan part numbers, a line-card export, a drawing, or a physical sample. The Crestflo Engineering Team returns the interchange equivalent, the thread and seat parity notes, the available alloys, and a quote, no login and no gated tool. Where competitors bury a "Brennan cross reference PDF" in an un-searchable download, Crestflo returns a clean document tied to your actual part list. Ask through the request-a-quote form or email sales@crestflousa.com.

Request your Brennan® cross-reference →

Brennan JIC 37° flare interchange (SAE J514 / ISO 8434-2)

The 37° JIC flare is the highest-overlap family. Crestflo manufactures 37° flare fittings per ISO 8434-2 with SAE J514 thread and seat geometry, up to 2" (50 mm) OD and working pressures up to 15,000 PSI and temperatures up to 350 °C (values per applicable standard; customizable to requirement), in stainless and the full alloy range. That is the equivalent for a Brennan JIC 37° adapter, elbow, tee, or union in a corrosion-resistant material. See 37° JIC flare fittings and JIC-37 tube fittings.

Brennan SAE 45° flare interchange

For the 45° SAE flare line, Crestflo builds the dimensional equivalent to the same dash sizes and thread forms in stainless and alloy, the interchange for a Brennan 45° flare adapter or connector where the application benefits from a CRA material. See 45° SAE flare fittings.

Brennan DIN 2353 metric bite-type & compression interchange (ISO 8434-1)

Brennan's metric bite-type, commonly searched as Brennan metric, compression, or flareless fittings, cross-references to Crestflo's DIN 2353 line, built to the 24° cone geometry of ISO 8434-1 / DIN 2353 with hardened and non-hardened ferrules to requirement across the L (light) and S (heavy) series. See DIN 2353 bite-type fittings and the hardened vs non-hardened ferrules guide.

Brennan NPT, BSPP & pipe-thread adapter interchange

Brennan pipe-thread adapters cross-reference to Crestflo's stainless and alloy adapter line. NPT and NPTF ends are built to ASME B1.20.1; BSPP parallel ends to ISO 1179 / BS 5200; SAE straight-thread O-ring boss (ORB) to SAE J1926. See NPT fittings, adapter fittings, BSPP fittings, and SAE ORB fittings. Brennan hose fittings and flexible hose ends cross-reference to flexible hose assemblies.

ORFS & O-ring face seal: an honest out-of-scope note

Brennan's O-ring face-seal (ORFS, SAE J1453 / ISO 8434-3) hydraulic line is not currently part of Crestflo's US instrumentation architecture, so it is out of scope for this interchange unless separately confirmed on your RFQ. Note a common point of confusion: Crestflo's metal face-seal fittings are VCR/VCO instrumentation face seals, a different, metal-gasket sealing family, not hydraulic ORFS. If you run Brennan ORFS, tell us the application and we will advise whether a JIC, ORB, or metal face-seal path fits; we will not represent an equivalent we do not build.

Brennan Equivalents in Stainless AND Exotic Alloys (316L, Super Duplex, Inconel, Hastelloy)

This is where Crestflo separates from a commodity hydraulic interchange. A carbon-steel or zinc-plated Brennan adapter has no shelf equivalent in a high-nickel or super-duplex alloy, Crestflo builds the same connection geometry across the corrosion-resistant range. Availability is by connection family and alloy; per-part confirmation comes with your quote.

Alloy availability, Crestflo Brennan-equivalent fittings

✓ = available / made-to-order in that alloy. Ready stock for standard items · made-to-order for specials · 6–8 week delivery. Per-part alloy confirmation is provided with your quote.

Match a Brennan fitting to the alloy your service actually needs: Hastelloy C-276 for wet chlorine and mixed acids, Super Duplex 2507 for offshore and subsea chlorides, Inconel 625 for high-temperature and sour gas, and Monel 400 for hydrofluoric and marine service. The grade pages, 316/316L, 254 SMO, Inconel 625, explain where each fits.

Why the interchange is proven: ASTM F1387

The interchange claim rests on a standard, not on marketing. Crestflo compression and flare fittings are tested to ASTM F1387, the performance qualification that covers the dimensional and mechanical behavior underlying equivalence, proof, burst, impulse, vibration, thermal cycling, and pull-out performance. That is the difference between a documented, qualified equivalent and an uncontrolled marketplace "equivalent" with no proof or traceability. Read more on the ASTM F1387 interchange qualification page.

Interchange-proof summary

Interchange vs. intermix: the honest engineering note

Every specifying engineer should ask this, and the honest answer earns trust:

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

So when buyers search "are Brennan fittings compatible with…", the precise answer is: use complete Crestflo fittings as interchange equivalents; do not intermix components within a joint. Crestflo uses "interchange" and "equivalent", never "compatible" or "intermix", because the distinction is a safety fact, not a word game.

Why buyers switch to Crestflo

Crestflo is the alloy-aware alternative to a commodity hydraulic interchange, and the reasons buyers move are specific. When engineers weigh Crestflo vs Brennan, or run a Brennan vs Parker vs Crestflo comparison, the deciding factor is usually material: the incumbents interchange in carbon steel, while Crestflo interchanges the same connection geometry in stainless and corrosion-resistant alloys.

• Dimensional interchange backed by ASTM F1387, a qualified equivalent, not a marketplace guess.
• Stainless AND corrosion-resistant alloys, 316/904L plus Super Duplex, 254 SMO, Alloy 20, Inconel, Monel, Hastelloy, and Titanium Gr2, a range a carbon-steel hydraulic shelf cannot match. Available to NACE MR0175 / ISO 15156 for sour service.
• Ready stock for standard items · made-to-order for specials · 6–8 week delivery, see lead time.
• Cost-competitive even after US duties/tariffs, see the tariff cost advantage.
• Small MOQ and private-label / OEM programs, see private label.
• Heat/lot number on every part with EN 10204 3.1 MTC as standard, see traceability.

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 US-origin compliance. We Engineer Confidence.

How to request your Brennan cross-reference

1. Send your Brennan part numbers, a line-card export, a drawing, or a sample.
2. Tell us the connection family, size, and alloy you need (or ask us to match what you run today).
3. We return the Crestflo interchange 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 Brennan® cross-reference & quote → · Request a sample · Become a distributor · Or contact Crestflo: sales@crestflousa.com · +1 346 594 9005 · Houston, TX.

Other brand fitting cross-references

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

• Swagelok cross-reference · Parker A-Lok cross-reference
• Parker CPI cross-reference · Hy-Lok cross-reference
• Hoke cross-reference · Gyrolok cross-reference
• Fitok cross-reference · DK-Lok cross-reference
• All brand interchange guides · Master interchange chart · Cross-reference lookup tool

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