Identification sheet

SAE inch fittings: JIC 37, ORB, ORFS and SAE 45

The four inch connections found on North American equipment, with the thread each dash size carries. JIC and ORB share a thread at every dash, and SAE 45 shares it at six of them, so the seat column on the identification sheet is what separates them.

42 rows4 sectionsLandscape

SAE inch fittings: JIC 37, ORB, ORFS and SAE 45

42 rows. Print landscape.

SAE inch fittings: JIC 37, ORB, ORFS and SAE 45. The four inch connections found on North American equipment, with the thread each dash size carries. JIC and ORB share a thread at every dash, and SAE 45 shares it at six of them, so the seat column on the identification sheet is what separates them.
Size	Thread	TPI / pitch	Basic major Ø	Measured across crests	Tube OD	Working pressure
JIC 37 degree flare (SAE J514 / ISO 8434-2)
-02 JIC	5/16-24 UNF	24 TPI (1.058 mm pitch)	7.94 mm / 0.313 in	Not published	0.125 in	5,000 psi (345 bar)
-03 JIC	3/8-24 UNF	24 TPI (1.058 mm pitch)	9.53 mm / 0.375 in	9.5 mm to 9.65 mm	0.1875 in	5,000 psi (345 bar)
-04 JIC	7/16-20 UNF	20 TPI (1.27 mm pitch)	11.11 mm / 0.438 in	11 mm to 11.18 mm	0.25 in	5,000 psi (345 bar)
-05 JIC	1/2-20 UNF	20 TPI (1.27 mm pitch)	12.7 mm / 0.5 in	12.5 mm to 12.7 mm	0.3125 in	5,000 psi (345 bar)
-06 JIC	9/16-18 UNF	18 TPI (1.411 mm pitch)	14.29 mm / 0.563 in	14.1 mm to 14.3 mm	0.375 in	5,000 psi (345 bar)
-08 JIC	3/4-16 UNF	16 TPI (1.587 mm pitch)	19.05 mm / 0.75 in	18.9 mm to 19.1 mm	0.5 in	4,500 psi (310 bar)
-10 JIC	7/8-14 UNF	14 TPI (1.814 mm pitch)	22.23 mm / 0.875 in	22.1 mm to 22.35 mm	0.625 in	3,500 psi (241 bar)
-12 JIC	1 1/16-12 UN	12 TPI (2.117 mm pitch)	26.99 mm / 1.063 in	26.9 mm to 27 mm	0.75 in	3,500 psi (241 bar)
-14 JIC	1 3/16-12 UN	12 TPI (2.117 mm pitch)	30.16 mm / 1.188 in	30 mm to 30.23 mm	0.875 in	3,000 psi (207 bar)
-16 JIC	1 5/16-12 UN	12 TPI (2.117 mm pitch)	33.34 mm / 1.313 in	33.2 mm to 33.3 mm	1 in	3,000 psi (207 bar)
-20 JIC	1 5/8-12 UN	12 TPI (2.117 mm pitch)	41.27 mm / 1.625 in	41.2 mm to 41.4 mm	1.25 in	2,500 psi (172 bar)
-24 JIC	1 7/8-12 UN	12 TPI (2.117 mm pitch)	47.62 mm / 1.875 in	47.6 mm to 47.75 mm	1.5 in	2,000 psi (138 bar)
-32 JIC	2 1/2-12 UN	12 TPI (2.117 mm pitch)	63.5 mm / 2.5 in	63.3 mm to 63.5 mm	2 in	1,500 psi (103 bar)
SAE straight thread O-ring boss, ORB (SAE J1926-1 / ISO 11926-1)
-02 SAE ORB	5/16-24 UNF	24 TPI (1.058 mm pitch)	7.94 mm / 0.313 in	7.87 mm to 7.9 mm	0.125 in	5,000 psi (345 bar)
-03 SAE ORB	3/8-24 UNF	24 TPI (1.058 mm pitch)	9.53 mm / 0.375 in	9.5 mm to 9.65 mm	0.1875 in	5,000 psi (345 bar)
-04 SAE ORB	7/16-20 UNF	20 TPI (1.27 mm pitch)	11.11 mm / 0.438 in	11 mm to 11.18 mm	0.25 in	4,500 to 5,000 psi (310 to 345 bar)
-05 SAE ORB	1/2-20 UNF	20 TPI (1.27 mm pitch)	12.7 mm / 0.5 in	12.5 mm to 12.7 mm	0.3125 in	4,000 to 5,000 psi (276 to 345 bar)
-06 SAE ORB	9/16-18 UNF	18 TPI (1.411 mm pitch)	14.29 mm / 0.563 in	14.1 mm to 14.22 mm	0.375 in	4,000 to 5,000 psi (276 to 345 bar)
-08 SAE ORB	3/4-16 UNF	16 TPI (1.587 mm pitch)	19.05 mm / 0.75 in	18.9 mm to 19.05 mm	0.5 in	4,000 to 4,500 psi (276 to 310 bar)
-10 SAE ORB	7/8-14 UNF	14 TPI (1.814 mm pitch)	22.23 mm / 0.875 in	22.1 mm to 22.35 mm	0.625 in	3,000 to 3,500 psi (207 to 241 bar)
-12 SAE ORB	1 1/16-12 UN	12 TPI (2.117 mm pitch)	26.99 mm / 1.063 in	26.9 mm to 26.92 mm	0.75 in	3,000 to 3,500 psi (207 to 241 bar)
-14 SAE ORB	1 3/16-12 UN	12 TPI (2.117 mm pitch)	30.16 mm / 1.188 in	30 mm to 30.23 mm	0.875 in	2,500 to 3,000 psi (172 to 207 bar)
-16 SAE ORB	1 5/16-12 UN	12 TPI (2.117 mm pitch)	33.34 mm / 1.313 in	33.2 mm to 33.27 mm	1 in	2,500 to 3,000 psi (172 to 207 bar)
-20 SAE ORB	1 5/8-12 UN	12 TPI (2.117 mm pitch)	41.27 mm / 1.625 in	41.2 mm to 41.4 mm	1.25 in	2,000 to 2,500 psi (138 to 172 bar)
-24 SAE ORB	1 7/8-12 UN	12 TPI (2.117 mm pitch)	47.62 mm / 1.875 in	47.6 mm to 47.75 mm	1.5 in	1,500 to 2,000 psi (103 to 138 bar)
-32 SAE ORB	2 1/2-12 UN	12 TPI (2.117 mm pitch)	63.5 mm / 2.5 in	about 63.5 mm	2 in	1,125 to 1,500 psi (78 to 103 bar)
O-ring face seal, ORFS (SAE J1453 / ISO 8434-3)
-04 ORFS	9/16-18 UNF	18 TPI (1.411 mm pitch)	14.29 mm / 0.563 in	14.1 mm to 14.22 mm	0.25 in	6,000 psi (414 bar)
-06 ORFS	11/16-16 UNF	16 TPI (1.587 mm pitch)	17.46 mm / 0.688 in	17.3 mm to 17.53 mm	0.375 in	6,000 psi (414 bar)
-08 ORFS	13/16-16 UNF	16 TPI (1.587 mm pitch)	20.64 mm / 0.813 in	20.6 mm to 20.83 mm	0.5 in	6,000 psi (414 bar)
-10 ORFS	1-14 UNF	14 TPI (1.814 mm pitch)	25.4 mm / 1 in	25.3 mm to 25.4 mm	0.625 in	6,000 psi (414 bar)
-12 ORFS	1 3/16-12 UN	12 TPI (2.117 mm pitch)	30.16 mm / 1.188 in	30 mm to 30.23 mm	0.75 in	6,000 psi (414 bar)
-16 ORFS	1 7/16-12 UN	12 TPI (2.117 mm pitch)	36.51 mm / 1.438 in	36.3 mm to 36.58 mm	1 in	5,000 to 6,000 psi (345 to 414 bar)
-20 ORFS	1 11/16-12 UN	12 TPI (2.117 mm pitch)	42.86 mm / 1.688 in	42.6 mm to 42.93 mm	1.25 in	4,000 psi (276 bar)
-24 ORFS	2-12 UN	12 TPI (2.117 mm pitch)	50.8 mm / 2 in	50.6 mm to 50.8 mm	1.5 in	3,000 to 4,000 psi (207 to 276 bar)
SAE 45 degree flare (SAE J512 / SAE J533)
1/8 in SAE 45	5/16-24 UNF	24 TPI (1.058 mm pitch)	7.94 mm / 0.313 in	Not published	0.125 in	Not published
3/16 in SAE 45	3/8-24 UNF	24 TPI (1.058 mm pitch)	9.53 mm / 0.375 in	Not published	0.1875 in	Not published
1/4 in SAE 45	7/16-20 UNF	20 TPI (1.27 mm pitch)	11.11 mm / 0.438 in	11 mm to 11.18 mm	0.25 in	Not published
5/16 in SAE 45	1/2-20 UNF	20 TPI (1.27 mm pitch)	12.7 mm / 0.5 in	12.5 mm to 12.7 mm	0.3125 in	Not published
3/8 in SAE 45	5/8-18 UNF	18 TPI (1.411 mm pitch)	15.88 mm / 0.625 in	15.9 mm to 16 mm	0.375 in	Not published
1/2 in SAE 45	3/4-16 UNF	16 TPI (1.587 mm pitch)	19.05 mm / 0.75 in	19.05 mm to 19.1 mm	0.5 in	Not published
5/8 in SAE 45	7/8-14 UNF	14 TPI (1.814 mm pitch)	22.23 mm / 0.875 in	22.1 mm to 22.35 mm	0.625 in	Not published
3/4 in SAE 45	1 1/16-14 UNF	14 TPI (1.814 mm pitch)	26.99 mm / 1.063 in	26.9 mm to 26.92 mm	0.75 in	Not published

Sources: Hydraulic coupling identification chart E2/50101 (Gates); Fluid Ports and Connectors Identification Guide (McGill Hose & Coupling); Master catalogue: conformance, working pressure and torque tables (Tompkins Industries); Catalogue page 4: SAE J514 working pressure ratings, and SAE J1453 working, proof and minimum burst pressures for face seal fittings (Brennan Industries); SAE threads reference tables (RYCO Hydraulics); Thread identification: BSP, JIC, ORFS and metric tables (Apex Fluid Power); Thread identification guide, O-ring face seal, with adapter sizing chart (Central Hydraulic Supply); Boss, face and flange O-rings: AS568 900 series and zero series (Global O-Ring and Seal); JIC fitting thread sizes (GageRef); ORFS fitting thread sizes (GageRef).

Reference aid for identification and ordering, not a substitute for the manufacturer specification. Pressure ratings apply only under the conditions printed beside them. Verify against the maker's catalogue before a system is charged.

Free to read

Every figure on this sheet, on its own page

Nothing on this sheet is behind the paywall as information. Each standard below has a free index carrying the same table, and each size has its own page with the measured span, the seat, what it mates with and the sources behind every figure.

JIC 37 degree flare13 sizes, freeSAE J514, ISO 8434-2 SAE O-ring boss13 sizes, freeSAE J1926-1, ISO 11926-1 ORFS (O-ring face seal)8 sizes, freeSAE J1453, ISO 8434-3 SAE 45 degree flare8 sizes, freeSAE J512, SAE J533

More sheets

Other identification charts

Pipe threads: NPT, BSPP and BSPT32 rows Metric DIN 2353 / ISO 8434-1, light and heavy series20 rows Japanese fittings: JIS 30 degree and Komatsu 30 degree16 rows Seat and thread identification: all ten standards10 rows Published working pressures, with the conditions they apply under61 rows

Where these figures come from

Every value on this page was checked against 10 independent published sources:

Hydraulic coupling identification chart E2/50101 - Gates, Gates Europe, 2004 (manufacturer, read 2026-08-27)
Fluid Ports and Connectors Identification Guide - McGill Hose & Coupling, SAE J512, J514, J1453, J1926-1, ISO 228, ISO 7, DIN 2353, JIS (distributor, read 2026-08-27)
Master catalogue: conformance, working pressure and torque tables - Tompkins Industries, SAE J514, SAE J1453, SAE J1926-1, SAE J1926-3, ISO 11926-1 (manufacturer, read 2026-08-27)
Catalogue page 4: SAE J514 working pressure ratings, and SAE J1453 working, proof and minimum burst pressures for face seal fittings - Brennan Industries, SAE J514, SAE J1453 (manufacturer, read 2026-08-27)
SAE threads reference tables - RYCO Hydraulics, SAE J512 (manufacturer, read 2026-08-27)
Thread identification: BSP, JIC, ORFS and metric tables - Apex Fluid Power, ISO 12151-2, ISO 8434-1 (distributor, read 2026-08-27)
Thread identification guide, O-ring face seal, with adapter sizing chart - Central Hydraulic Supply, SAE J1453 (distributor, read 2026-08-27)
Boss, face and flange O-rings: AS568 900 series and zero series - Global O-Ring and Seal, AS568 (manufacturer, read 2026-08-27)
JIC fitting thread sizes - GageRef, SAE J514 (reference table, read 2026-08-27)
ORFS fitting thread sizes - GageRef, SAE J1453 (reference table, read 2026-08-27)