connection_type stringlengths 3 52 | derived_fields listlengths 1 1 | governing_standard stringlengths 3 19 | id stringlengths 3 50 | interchangeability_notes stringlengths 66 191 ⌀ | region stringclasses 6
values | seal_method stringlengths 49 321 | seat_angle stringlengths 3 12 ⌀ | source stringclasses 1
value | source_quote stringlengths 176 1.44k | thread_type stringclasses 9
values | url stringlengths 64 111 | verified_fields listlengths 3 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
BSPP | [
"region"
] | BSP | bspp | very similar (but not interchangeable) with the American NPSM male | British Connections | A captive seal is made using metal to metal angled surfaces or a combination of metal to metal and an O-ring. | cone seat | https://brennaninc.com/connection-types/ | The British Standard Pipe Parallel (BSPP) male connection is comparable to NPSM male except most sizes have a different thread pitch. A captive seal is made using metal to metal angled surfaces or a combination of metal to metal and an O-ring. This type of connection is very similar (but not interchangeable) with the A... | parallel | https://referencesource.org/hydraulic-pipe-connection-types/bspp/ | [
"connection_type",
"interchangeability_notes",
"seal_method",
"seat_angle",
"thread_type"
] |
BSPT | [
"region"
] | BSP | bspt | comparable to NPT, except most sizes have a different thread pitch, plus the OD's and thread form are close, but not the same | British Connections | Sealing takes place by distortion of the threads. | null | https://brennaninc.com/connection-types/ | British Connections British Standard Pipe (BSP) and British Standard Pipe Tapered (BSPT) connections are comparable to NPT, except most sizes have a different thread pitch, plus the OD’s and thread form are close, but not the same. Sealing takes place by distortion of the threads. Because of this, thread sealants are r... | tapered | https://referencesource.org/hydraulic-pipe-connection-types/bspt/ | [
"connection_type",
"governing_standard",
"interchangeability_notes",
"seal_method",
"thread_type"
] |
DIN 2353 / ISO 8434 | [
"region"
] | DIN 2353 / ISO 8434 | din-2353-iso-8434 | null | German Connections | The straight metric thread male has a 24° angle. Its recessed counter-bore matches the tube O.D. it is connected to. | 24° | https://brennaninc.com/connection-types/ | DIN 2353 / ISO 8434 series is a common male with three different possible female halves. The straight metric thread male has a 24° angle. Its recessed counter-bore matches the tube O.D. it is connected to. | straight metric thread | https://referencesource.org/hydraulic-pipe-connection-types/din-2353-iso-8434/ | [
"connection_type",
"governing_standard",
"seal_method",
"seat_angle",
"thread_type"
] |
DIN 3852 | [
"region"
] | DIN 3852 | din-3852 | Other countries sometimes use it as a reference for connector and port designs. | German Connections | DIN 3852 is a male connector and female port. It is a style controlled by German specifications. | null | https://brennaninc.com/connection-types/ | DIN 3852 is a male connector and female port. It is a style controlled by German specifications. Other countries sometimes use it as a reference for connector and port designs. | straight metric thread | https://referencesource.org/hydraulic-pipe-connection-types/din-3852/ | [
"connection_type",
"governing_standard",
"interchangeability_notes",
"seal_method"
] |
DIN 7631 | [
"region"
] | DIN 7631 | din-7631 | null | German Connections | The male connector has a straight metric thread with a 60° angle on the recessed cone. The female has a straight thread with a seat that is a tapered nose. The contact of the cone of the male and the tapered nose of the female flareless swivel is where the seal takes place. | 60° | https://brennaninc.com/connection-types/ | DIN 7631 series is a common metric-style connection in hydraulic systems. The male connector has a straight metric thread with a 60° angle on the recessed cone. The female has a straight thread with a seat that is a tapered nose. The contact of the cone of the male and the tapered nose of the female flareless swivel is... | straight metric thread | https://referencesource.org/hydraulic-pipe-connection-types/din-7631/ | [
"connection_type",
"governing_standard",
"seal_method",
"seat_angle",
"thread_type"
] |
Instrumentation Fittings (Double and Single Ferrule) | [
"region"
] | Instrumentation | instrumentation-fittings-double-and-single-ferrule | null | Instrumentation Fittings | The seal is made between the front ferrule and the cone. The tubing is held in place by the swaging action caused by the tightening of the nut, which forces the front and back ferrules to bite into the tubing, firmly holding it in place. | inner cone | https://brennaninc.com/connection-types/ | Double and Single Ferrule Instrumentation Fittings are widely used in fluid or gas transfer applications such as refineries, chemical plants and food processing plants. The male end of a double-ferrule instrumentation fitting has a recessed counter-bore which matches the tube OD being used, plus an inner cone. The seal... | UNEF (extra fine) | https://referencesource.org/hydraulic-pipe-connection-types/instrumentation-fittings-double-and-single-ferrule/ | [
"governing_standard",
"seal_method",
"seat_angle"
] |
ISO 6149 | [
"region"
] | ISO 6149 | iso-6149 | similar to the SAE J514 Straight Thread O-ring Boss (ORB), this type of connection incorporates metric threads | ISO Connections | The male connector has straight threads with an O-ring. The female port is also straight threads machined surface to provide a smooth, flat, accurately located surface (minimum spotface), along with a chamfer where the O-ring seats. It seals when the O-ring is compressed into the chamfer when mating the male connection... | flat face | https://brennaninc.com/connection-types/ | ISO 6149 Port and Stud Ends with ISO 261 Threads and O-ring Seal though it is similar to the SAE J514 Straight Thread O-ring Boss (ORB), this type of connection incorporates metric threads. The male connector has straight threads with an O-ring. The female port is also straight threads machined surface to provide a smo... | straight threads | https://referencesource.org/hydraulic-pipe-connection-types/iso-6149/ | [
"connection_type",
"governing_standard",
"interchangeability_notes",
"seal_method",
"thread_type"
] |
ISO/DIS 6162 4-Bolt Flange | [
"region"
] | ISO/DIS 6162 | iso-dis-6162-4-bolt-flange | Excluding bolt sizes, SAE J518, JIS B 8363, ISO/DIS 6162 and DIN 20066 are interchangeable. | ISO Connections | The male is a flanged head with a groove for an O-ring to seat and either split or captive flange halves and bolt holes which match the port. The seal is made where the O-ring is compressed between the flanged head and the flat surface of the port. The connection is held by threaded bolts. | flat surface | https://brennaninc.com/connection-types/ | The seal is made where the O-ring is compressed between the flanged head and the flat surface of the port. The connection is held by threaded bolts. <https://brennaninc.com/fittings-101-flange> JIS 210 Kgf/cm2 4-Bolt Square Flange incorporates a JIS 4-bolt square flange connection which is comparable to SAE 4-bolt flan... | flange bolts | https://referencesource.org/hydraulic-pipe-connection-types/iso-dis-6162-4-bolt-flange/ | [
"connection_type",
"governing_standard",
"seal_method",
"seat_angle"
] |
JIS 210 Kgf/cm2 4-Bolt Square Flange | [
"region"
] | JIS | jis-210-kgf-cm2-4-bolt-square-flange | comparable to SAE 4-bolt flange connections with one difference – the flange itself is different and the JIS bolt pattern is square | Japanese Connections | JIS 210 Kgf/cm2 4-Bolt Square Flange incorporates a JIS 4-bolt square flange connection | flat face | https://brennaninc.com/connection-types/ | JIS 210 Kgf/cm2 4-Bolt Square Flange incorporates a JIS 4-bolt square flange connection which is comparable to SAE 4-bolt flange connections with one difference – the flange itself is different and the JIS bolt pattern is square. | flange bolts | https://referencesource.org/hydraulic-pipe-connection-types/jis-210-kgf-cm2-4-bolt-square-flange/ | [
"connection_type",
"governing_standard",
"interchangeability_notes",
"seal_method"
] |
JIS 30° Female (Cone) Seat | [
"region"
] | JIS B 0202 | jis-30-female-cone-seat | JIS 30° flare angle and dimensions are different with threads that are similar to BSPP | Japanese Connections | Japanese JIS 30° flare connections are comparable to American SAE 37° flare connections in application and sealing principals. | 30° | https://brennaninc.com/connection-types/ | JIS 30° Female (Cone) Seat connections are are parallel pipe threads per JIS B 0202. Japanese JIS 30° flare connections are comparable to American SAE 37° flare connections in application and sealing principals. Yet, JIS 30° flare angle and dimensions are different with threads that are similar to BSPP. | parallel pipe threads | https://referencesource.org/hydraulic-pipe-connection-types/jis-30-female-cone-seat/ | [
"connection_type",
"governing_standard",
"interchangeability_notes",
"seal_method",
"seat_angle",
"thread_type"
] |
JIS 30° Male Inverted Seat | [
"region"
] | JIS B 0202 | jis-30-male-inverted-seat | JIS parallel connections are comparable to BSPP connections. JIS parallel thread connections are interchangeable with BSPP connections. | Japanese Connections | JIS 30° Male Inverted Seat connections are parallel pipe threads per JIS B 0202. | 30° | https://brennaninc.com/connection-types/ | JIS 30° Male Inverted Seat connections are parallel pipe threads per JIS B 0202. JIS parallel connections are comparable to BSPP connections. JIS parallel thread connections are interchangeable with BSPP connections. | parallel pipe threads | https://referencesource.org/hydraulic-pipe-connection-types/jis-30-male-inverted-seat/ | [
"connection_type",
"governing_standard",
"interchangeability_notes",
"seal_method",
"seat_angle",
"thread_type"
] |
JIS B 8363 4-Bolt Flange | [
"region"
] | JIS B 8363 | jis-b-8363-4-bolt-flange | Excluding bolt sizes, SAE J518, JIS B 8363, ISO/DIS 6162 and DIN 20066 are interchangeable. | Japanese Connections | The male connector has a flanged head with a groove for seating an O-ring and either a captive flange or split flange with bolt holes to correspond to the port. The seal is made where the O-ring is compressed between the flanged head and the flat surface of the port. The connection is held by threaded bolts. | flat surface | https://brennaninc.com/connection-types/ | JIS B 8363 4-Bolt Flange connections are frequently used in fluid power systems. There are two pressure ratings for JIS B 8363 4-Bolt Flange fittings: Type I Code 61 is the standard series 4-Bolt Flange Type II Code 62 is the 6000 PSI series Each design concept is the same, yet the flanged head diameters and bolt hole ... | flange bolts | https://referencesource.org/hydraulic-pipe-connection-types/jis-b-8363-4-bolt-flange/ | [
"connection_type",
"governing_standard",
"seal_method",
"seat_angle"
] |
JIS Tapered Pipe (PT) | [
"region"
] | JIS B 0203 | jis-tapered-pipe-pt | JIS tapered thread connections are interchangeable with BSPT connections. | Japanese Connections | JIS Tapered Pipe (PT) has metric threads per JIS B 0203. These are JIS tapered threads and are comparable to the design of BSPT connections in their dimensions and appearance. | null | https://brennaninc.com/connection-types/ | JIS Tapered Pipe (PT) has metric threads per JIS B 0203. These are JIS tapered threads and are comparable to the design of BSPT connections in their dimensions and appearance. JIS tapered thread connections are interchangeable with BSPT connections. | tapered | https://referencesource.org/hydraulic-pipe-connection-types/jis-tapered-pipe-pt/ | [
"connection_type",
"governing_standard",
"interchangeability_notes",
"seal_method",
"thread_type"
] |
NPT | [
"region"
] | NPT | npt | null | American Connections | NPT is a U.S. standard for tapered threads used on pipes and fittings. They are used to effectively seal pipes for fluid and gas transfer. | null | https://brennaninc.com/connection-types/ | NPT (National Pipe Tapered) -style pipe threads have been widely used for over 100 years. NPT is a U.S. standard for tapered threads used on pipes and fittings. They are used to effectively seal pipes for fluid and gas transfer. The nominal pipe size can be identified by physically measuring the thread diameter, then s... | tapered | https://referencesource.org/hydraulic-pipe-connection-types/npt/ | [
"connection_type",
"governing_standard",
"seal_method",
"thread_type"
] |
NPTF | [
"region"
] | NPTF | nptf | null | American Connections | They have a tapered thread by which a seal is made by deformation of the threads. | null | https://brennaninc.com/connection-types/ | NPTF (National Pipe Tapered Fuel) -style connections are widely used in fluid power systems. They have a tapered thread by which a seal is made by deformation of the threads. NPTF Threads are measured at the thread diameter and subtracting 1/4-inch to establish the nominal pipe size. | tapered thread | https://referencesource.org/hydraulic-pipe-connection-types/nptf/ | [
"connection_type",
"governing_standard",
"seal_method",
"thread_type"
] |
SAE J1453 (ORFS) | [
"region"
] | SAE J1453 | sae-j1453-orfs | null | American Connections | The male connector has a straight thread and an O-ring in the face. The female has a straight thread and a machined flat face. The seal takes place by compressing the O-ring onto the flat face of the female, similar to the split flange type fitting. | flat face | https://brennaninc.com/connection-types/ | SAE J1453 (ORFS) O-ring Face Seal connections are considered the best for leak control. The male connector has a straight thread and an O-ring in the face. The female has a straight thread and a machined flat face. The seal takes place by compressing the O-ring onto the flat face of the female, similar to the split fla... | straight thread | https://referencesource.org/hydraulic-pipe-connection-types/sae-j1453-orfs/ | [
"connection_type",
"governing_standard",
"seal_method",
"seat_angle",
"thread_type"
] |
SAE J1926 Straight Thread O-Ring Boss (ORB) | [
"region"
] | SAE J1926 | sae-j1926-straight-thread-o-ring-boss-orb | null | American Connections | The male connection is a straight thread with an O-ring. The female port has a straight thread and a machined surface to provide a smooth, flat surface (minimum spotface), along with a chamfer where the O-ring seats. It seals when the O-ring is compressed into the chamfer when mating the male connection. | flat surface | https://brennaninc.com/connection-types/ | SAE J1926 Straight Thread O-Ring Boss (ORB) is recommended by the National Fire Protection Association (N.F.P.A.) for leak prevention in medium and high pressure hydraulic systems. The male connection is a straight thread with an O-ring. The female port has a straight thread and a machined surface to provide a smooth, ... | straight thread | https://referencesource.org/hydraulic-pipe-connection-types/sae-j1926-straight-thread-o-ring-boss-orb/ | [
"connection_type",
"governing_standard",
"seal_method",
"seat_angle",
"thread_type"
] |
SAE J512 45° | [
"region"
] | SAE J512 | sae-j512-45 | dash sizes: -02, -03, -04, -05, -08, and -10 of SAE 37° and SAE 45° have the same threads, but NOT the same seat angles. Intermixing the two different types of fittings will result in leakage | American Connections | The male and female connections have 45° seats, where the seal is make where the male flare and the female cone meet. | 45° | https://brennaninc.com/connection-types/ | SAE J512 45° connections are used in automotive, refrigeration and truck pipe systems. These connectors are typically brass material. The male and female connections have 45° seats, where the seal is make where the male flare and the female cone meet. This is a mechanical connection also. | straight thread | https://referencesource.org/hydraulic-pipe-connection-types/sae-j512-45/ | [
"connection_type",
"governing_standard",
"seal_method",
"seat_angle"
] |
SAE J512 Inverted | [
"region"
] | SAE J512 | sae-j512-inverted | null | American Connections | The male connector is either a 45° flare within the tube fitting or a 42° seat in the machined adapter. The female incorporates a straight thread with a 42° inverted flare. The fittings are sealed at the flared surfaces. | 45° flare | https://brennaninc.com/connection-types/ | SAE J512 inverted connections are typically used in automotive systems. The male connector is either a 45° flare within the tube fitting or a 42° seat in the machined adapter. The female incorporates a straight thread with a 42° inverted flare. The fittings are sealed at the flared surfaces. These threads also maintain... | straight thread | https://referencesource.org/hydraulic-pipe-connection-types/sae-j512-inverted/ | [
"connection_type",
"governing_standard",
"seal_method",
"seat_angle",
"thread_type"
] |
SAE J514 JIC/37° | [
"region"
] | SAE J514 | sae-j514-jic-37 | dash sizes: -02, -03, -04, -05, -08, and -10 of SAE 37° and SAE 45° have the same threads, but NOT the same seat angles. Intermixing the two different types of fittings will result in leakage | American Connections | Both male and female components have 37° seats. The seal is made by establishing contact between the male flared and female coned seat. | 37° | https://brennaninc.com/connection-types/ | SAE J514 JIC/37° hydraulic connections are common in most fluid power systems. Both male and female components have 37° seats. The seal is made by establishing contact between the male flared and female coned seat. This is also considered a mechanical connection. | straight thread | https://referencesource.org/hydraulic-pipe-connection-types/sae-j514-jic-37/ | [
"connection_type",
"governing_standard",
"seal_method",
"seat_angle"
] |
SAE J518 4-Bolt Flange | [
"region"
] | SAE J518 | sae-j518-4-bolt-flange | Excluding bolt sizes, SAE J518, JIS B 8363, ISO/DIS 6162 and DIN 20066 are interchangeable. | American Connections | The male is a flanged head with a groove for an O-ring and either split or captive flange halves and bolt holes which match the port. The seal is made where the O-ring is compressed between the flanged head and the flat surface of the port. The connection is held by threaded bolts. | flat surface | https://brennaninc.com/connection-types/ | SAE J518 4-Bolt Flange* There are two pressure ratings for these connections: Code 61 which is considered the standard series and Code 62 which is the 6000 PSI series. The design is the same for each series, yet the flange head diameters and bolt hole spacing are larger for the 6000 PSI high pressure Code 62 connection... | flange bolts | https://referencesource.org/hydraulic-pipe-connection-types/sae-j518-4-bolt-flange/ | [
"connection_type",
"governing_standard",
"seal_method",
"seat_angle"
] |
Hydraulic and pipe connection type identification
Canonical, always-current version: https://referencesource.org/hydraulic-pipe-connection-types/ Machine-readable: https://referencesource.org/hydraulic-pipe-connection-types/data.json — this mirror is a point-in-time copy.
- Last verified: 2026-08-13
- Stale after: 2028-08-12 (past this date, prefer the canonical copy — it re-verifies on a cadence this snapshot does not)
- Records: 21
Identifying characteristics of each hydraulic, pipe, and instrumentation connection standard used in fluid power and plumbing systems. For each connection type, gives the governing standard, seat or flare angle, whether the thread is tapered or parallel, how the seal is made, and interchangeability notes with other standards. Answers the recurring field question 'what kind of fitting is this?' — the identification step that must happen before any cross-reference or adapter lookup.
Provenance — what every record carries
Every record carries source (the URL the value was read from) and
source_quote (a verbatim quote from that page stating it). A value you
cannot check against its page is indistinguishable from an invented one;
these can all be checked. Each record is also individually addressable on
the canonical site at its url.
Licence position
Factual compilation of connection type characteristics from a manufacturer's published identification guide. Individual facts (standard number, seat angle, thread type) are not copyrightable; short attributed quotes link back to the source page.
Facts are not copyrightable; what this dataset takes from each source is a fact plus a short attributed quote linking back to the page that states it.
Sources
Fields
See any record in data/records.jsonl — field names are self-describing,
and the canonical page for each record renders them with labels:
https://referencesource.org/hydraulic-pipe-connection-types/
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