37° Flare Fittings Manufacturer

Z-LOK is a trusted 37° Flare Fittings Manufacturer, providing superior quality flare fittings designed for safe and leak-free hydraulic and instrumentation connections. Precision manufactured and quality-tested, our 37° flare fittings offer high dimensional accuracy, reliability, and durability, even under extreme operating conditions and high pressure. Available in a variety of sizes, configurations, and materials, Z-LOK supplies reliable flare fittings with a 37° angle for industrial, hydraulic, automotive and fluid-controls systems.

37° Flare Fittings

Types Of 37° Flare Fittings

37° Flare Female Connector
37° Flare JIC Male Connector
37° Flare Elbow
37° Flare Male Elbow
37° Flare Female Elbow
37° Flare Union
37° Flare Union Cross
37° Flare Male Branch Tee
37° Flare Male Run Tee
37° Flare Bulkhead Union
37° Flare Weld Bulkhead Union
37° Flare Bulkhead Union Elbow
37° Flare Nut
37° Flare Tube Plug
37° Flare Sleeve
37° Flare Bulkhead Locknut
37° Flare Bulkhead Female Connector
37° Flare Tube Cap

Material Available of 37 Degree Fitting

  • SS 304 37 DEGREE JIC FLARE FITTINGS
  • SS 316 37 DEGREE FLARE FITTINGS
  • BRASS HTX UNION
  • BRASS JIC FITTINGS
  • BRASS MALE ELBOW 37 DEGREE FLARE
  • CARBON STEEL 37 DEGREE FLARE FITTINGS
  • DUPLEX 37 DEGREE FLARE FITTINGS
  • SUPER DUPLEX 37 DEGREE FLARE FITTINGS
  • INCONEL 37 DEGREE FLARE FITTINGS
  • MONEL 400 37 DEGREE FLARE FITTINGS
  • TITANIUM 37 DEGREE FLATER FITTINGS
  • ALLOY 20 37 DEGREE TUBE FITTINGS

Specification of JIC 37 Degree Flare Fittings

37 Degree Flare StandardSAE J514 / ISO 8434-2
MaterialCS, MS, SS 304L, SS 304, SS 316L, SS 316, SS 316Ti (1.4571), Copper, Brass, Super Duplex, Duplex, Alloy 20, Monel, Inconel, 904L, Hastelloy, Titanium, 6MO, Aluminium
37 Degree Flare Working Pressure100 Bar to 800 Bar
Size Range6 MM to 42 MM, 1/8″ JIC to 2″ JIC
Body TypeForged, Bar Stock
37 Degree Flare AccessoriesO-Ring, Dowty Seal, Copper Washer, ED Seal, Cutting Ring, Nut
O-Ring & SealsNBR (-35°C to 100°C), Viton (-25°C to 200°C), PTFE (-60°C to 240°C)
37 Degree Flare SurfaceCarbon Steel – Trivalent Zinc Plated, Yellow Plating, Black Phosphated
Stainless Steel – Export Bright Finish, Short Blasted Finish, Electroplated Finish
TemperatureSteel – (-40°C to 120°C), Stainless Steel – (-60°C to 400°C), Brass – (-60°C to 175°C)
Equivalent BrandsParker, Hy-Lok, DK-Lok, Stauff, Hydac, Voss
37 Degree Flare Applications & IndustriesConstruction Equipment, Drilling Platforms, Hydro Power Plants, Machine Tools, Railway Technology, Shipbuilding, Wind Turbine, Mobile Hydraulic Equipment, Mining, Stationary Hydraulic Equipment, Industrial Hydraulics, Injection Moulding Machinery, Aluminium Die-Casting Machinery, Sintering Machinery, Steel Mills, Hydraulic Presses, Paper Processing, Mobile Hydraulics, Building Machinery, Agricultural Forestry, Lifting & Material Handling Equipment
Material DesignatorStainless Steel – ASTM A276, ASTM A182

Steel – ASTM A108/A105, JIS G4051 S20C, S45C, G3201 SF440A

Brass – ASTM B16 UNS C36000, ASTM B282 Alloy 37700, JIS H3250 C3604, C3771, JIS H3250 C3771

37 Degree Flare Fittings Dimensions Chart, Diagram

37 Degree Flare Fittings Dimensions Chart, Diagram

An 37 Degree Flare Fittings Dimensions

37 Degree Flare Dash sizeInch size37 Degree Flare Thread SizeMale Thread O.D. (in)Female thread O.D (in)
-21/85/16 – 245/160.0319/320.027
-33/163/8 – 243/80.03811/320.034
-41/47/16 – 207/160.04413/320.039
-55/61/2 – 201/20.05015/320.045
-63/89/16 – 189/160.05617/320.051
-81/23/4 – 163/40.07511/160.069
-105/87/8 – 147/80.08813/160.081
-123/41 1/16 – 1211/161.00610.098
-147/81 3/16 – 121 3/161.0191 1/81.010
-1611 5/16 -121 5/161.0311 1/41.023
-201 1/41 5/8 – 121 5/81.0631 9/161.054
-241 1/21 7/8 – 121 7/81.0881 13/161.079
-3222 1/2 – 122 1/22.0502 7/162.042

Sizes of 37 Degree Flare Tube Fittings

37 Degree Flare SizeTube O.D.TT 
mminchMajor thread mmUN/ UNFD1 mm
461/411.007/16-204.05
585/1612.051/2-206.00
6103/814.009/16-187.05
8121/219.003/4-1610.00
1014, 15, 165/822.007/8-1412.05
1218, 203/427.001 1/16-1215.05
14227/830.001 3/16-1218.00
1625133.001 5/16-1221.05
2028, 30, 321 1/441.001 5/8-1227.05
2435, 381 1/247.051 7/8-1233.00
28421 3/457.002 1/4-1239.00
32–263.052 1/2-1245.00

Torque of 37 Degree Flare Fittings

37 Degree Flare Thread SizeAssembly Torque (ft-lb)Swivel Nut or Hose FFWRAssembly Torque (in-lb)Tube Connection FFWR
22 – 4N/A35 – 45N/A
35 – 7N/A65 – 75N/A
411 – 132130 – 1502
514 – 162165 – 1952
620 – 221.25235 – 2651.5
843 – 471525 – 5751.5
1055 – 651650 – 7501.5
1280 – 901950 – 10501.25
14100 – 11011200 – 13001
16115 – 12511400 – 15001
20160 – 18011900 – 21001
24185 – 21512250 – 25501
32250 – 29013000 – 34001

Sae 37 Degree Flare Fittings Pressure Rating

37 Degree Flare Thread Size37 Degree Flare Working Pressures
Nom Inch Tube ODSEA J1926/3/ ISO 11926-3 O-Ring Port and SEA J514 Flared Tube End Thread Size (Notes 1&2)37 Degree Unions, Flared Tube Ends and Bulkheads37 Degree Female Swivels.
  psiMPapsiMPa
1/85/16-24 UNF5,00034.055,00034.05
3/163/8-24 UNF5,00034.055,00034.05
1/47/16-20 UNF5,00034.054,50031
5/161/2-20 UNF5,00034.054,00027.05
3/89/16-18 UNF5,00034.054,00027.05
1/23/4-16 UNF4,500314,00027.05
5/87/8-14 UNF3,500243,00021
3/41-1/16-12 UN3,500243,00021
7/81-3/16-12 UN3,000212,50017
11-5/16-12 UN3,000212,50017
1 1/41-5/8-12 UN2,500172,00014
1 1/21-7/8-12 UN2,000141,50010.05
22-1/2-12 UN1,50010.051,1258
37 Degree Flare Thread Size37 Degree Flare Working Pressures
Nom Inch Pipe O.0D.0Dryseal Pipe Thread (NPTF) Male and FemaleFittings With NPTF Pipe Threads
  psiMPa
1/81/8-275,00034.05
1/41/4-184,00027.05
3/83/8-183,00021
1/21/2-143,00021
3/43/4-142,50017
11-11-1/22,00014
1 1/41-1/4-11-1/21,1508
1 1/21-1/2-11-1/21,0007
22-11-1/21,0007

Jic Tube Fittings Equivalent Material Grade

DESCRIPTIONBARSTOCKFORGINGUNS GRADECASTING
Carbon SteelA105A105K30504A216 WCB
Low Temp CarbonA350 LF2A350 LF2K03011A352 LCB
High Yield SteelA694 F60A694 F60K03014–
3 1/2 Nickel SteelA350 LF3A350 LF3K32025A352 LC3
5 Chrome, 1/2 MolyA182 F5A182 F5K41545A217 C5
1 1/4 Chrome, 1/2 MolyA182 F11A182 F11K11597A217 WC6
2 1/4 Chrome, 1 MolyA182 F22A182 F22K21590A217 WC9
9 Chrome, 1 MolyA182 F9A182 F9K90941A217 WC6
13 ChromeA276 or A479 410A182 F6AS41000A351 CA15
304A276 or A479 304A182 F304S30400A351 CF8
304LA276 or A479 304LA182 F304LS30403A351 CF3
316A276 or A479 316A182 F316S31600A351 CF8M
316LA276 or A479 316LA182 F316LS31603A351 CF3M
317LA276 or A479 317LA182 F317LS31703A351 CG8M
321A276 or A479 321A182 F321S32100–
347A276 or A479 347A182 F347S34700A351 CF8C
17-4PH–A564 630S17400–
Alloy 400B164 N04400B564 N04400N04400A494 M35-1
Alloy K500B865 N05500–N05500–
Alloy 800B408 N08800B564 N08810N08800–
Alloy 825B425 N08825–N08825–
Alloy 600B166 N06600B564 N06600N06600A494 CY40
Alloy 625B446 N06625B564 N06625N06625A494 CW 6MC
Alloy B2B335 N10665B564 N10665N10665A494 N 12MV
Alloy C––N10002A494 CW6M
Alloy C22B574 N06022B574 N06022N06022A494 CX2MW
Alloy C276B574 N10276B564 N10276N10276A494 CW12 MW
22% DuplexA276 or A479 S31803A182 F51S31803A890 Gr 4A
25% DuplexA276 or A479 S32750 or 60A182 F53S32750 or 32760A890 Gr 6A
254SMOA182 F44A182 F44S31254A351 CK3MCuN
904LB649 N08904B625 N08904N08904–
TitaniumB348 Gr 2B381 F2R50400B367 C2

Pipe Thread Description :

37 Degree Flare Thread TypeCode
ISO Tapered Thread (BSPT)RT
NPT ThreadN
SAE/MS Straight ThreadSE