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SPECIFICATIONS

Applications: Hydraulic brake, power steering, fuel lines and transmission cooler lines, LP and natural gas. Used With: Copper, brass, aluminum and steel hydraulic tubing that can be flared.
SAE Rating: SAE# 040424 Conformance: Meets specifications and standards of ASA, ASME, SAE and MS (Military Standards).
Vibration: Excellent resistance. Temperature Range: -65F to +250F (-53C to +121C) range at maximum operating pressures.
Advantages: Very low cost and reusable. Seats and threads are internal and protected. Compact, excellent vibration life. Short nut affords very close tube bends. Tolerance: +/- .03 on all dimensions.
Working Pressure Ranges:
  • Temperature and type of tubing used are important factors. However, the following table is a good guide for proper selection. Temperature 73F with copper tubing:
Assembly Instructions:
  • 1) Cut tubing to desired length. Make sure all burrs are removed and ends are cut square.
  • 2) Slide nut on tube. Threaded end “A” of nut must face out.
  • 3) Flare end of tube with a 450 flaring tool.
    • A) Measure flare diameter
    • B) Examine flare for excessive thin out.
    • C) On thin wall, welded or brazed tubing, use double flare to prevent pinch-off and cracked flares.
  • 4) Lubricate threads and assemble to fitting body. Nut should be turned hand tight.
Tube OD 1/8″ 3/16″ 1/4″ 5/16″ 3/8″ 7/16″ 1/2″ 5/8″ 3/4″ 7/8″ 1″
Thread OD
(Threads per inch)
5/16-28 3/8-24 7/16-24 1/2-20 5/8-18 11/16-18 3/4-18 7/8-18 1-1/16-16 1-3/16-16 1-5/16-16
Standard Metric Threads:
Description
Tube Size
Thread OD Crest
(Pitch)
Thread
Description
Japanese 3/16″ 10mm 1.0mm M10 x 1.0
European 3/16″ 10mm 1.0mm M10 x 1.0
GM 6mm 12mm 1.0mm M12 x 1.0
Fuel 5/16″ 14mm 1.5mm M14 x 1.5
Fuel 3/8″ 16mm 1.5mm M16 x 1.5
Measuring Metric Threads: Measure the O.D. of the threads and the crest to crest distance (pitch) in millimeters between threads.
Crossover Series:
51IF 511N 251IFHD 752 550 151
Part Number Female Inverted Flare (1 & 3) x Male NPTF (2) A B C Approx. Weight
(Lbs.)
12118
(12-118)
3/16″ x 1/8″ 0.53″ 0.72″ 0.39″ 0.06
12119
(12-119)
1/4″ x 1/8″ 0.56″ 0.75″ 0.42″ 0.08
12120
(12-120)
5/16″ x 1/8″ 0.62″ 0.85″ 0.45″ 0.10
12121
(12-121)
3/8″ x 1/4″ 0.75″ 1.08″ 0.56″ 0.14

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