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12221 (12-221) by Midland | Inverted Flare Auto Fitting | Dual Master Cylinder Adapter | 5/16" Male Inverted Thread x 3/8" Female Inverted Thread | Straight | Brass

12221 (12-221) by Midland | Inverted Flare Auto Fitting | Dual Master Cylinder Adapter | 5/16" Male Inverted Thread x 3/8" Female Inverted Thread | Straight | Brass

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Midland Industries
Brass Fitting - Inverted Flare Auto Fitting - Dual Master Cylinder Adapter - Male Inverted Thread x Female Inverted Thread - Brass

Inventory @ Manufacturers Warehouse: 2174 Units
Specifications for Variant SKU: 12221 Midland
Shape (Orientation): Straight
Ends Configuration: 5/16in Male Inverted Flare, 3/8in Female Inverted Flare, Some Ends Match
Material(s): Brass
Applicable Specs & Approvals: ASA, ASME, SAE, MS (Military Standards)
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: N/A Conformance: Meets specifications and standards of ASA, ASME, SAE and MS (Military Standards).
Vibration: Excellent resistance. Temperature Range: -65°F to +250°F (-53°C to +121°C) 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 73°F 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:
48STA 6641N 6011N
Part Number Male Inverted Thread Female Inverted Thread Ref #
12206
(12-206)		 3/16"(9/16-18) 3/16" 7911
12207
(12-207)		 3/16"(9/16-20) 3/16" 7910
12210
(12-210)		 3/16" 1/4" 7828
12212
(12-212)		 1/4" 3/16" 7818
12214*
(12-214)		 7/16-20 1/4" 7732
12211
(12-211)		 1/4"(9/16-18) 1/4" 7908
12215
(12-215)		 1/4" 5/16" 7917
12213*
(12-213)		 5/16" 3/16" 7817
12216
(12-216)		 5/16" 3/16" 7909
12208
(12-208)		 5/16" 3/16"(9/16-18) 7912
12220
(12-220)		 5/16" 1/4" 7829
12221
(12-221)		 5/16" 3/8" 7915
12224
(12-224)		 3/8" NPTF 5/16" 7771
12217
(12-217)		 3/8" 5/16" 7916

* Seals on hex face

Midland Industries

Midland Industries is a family of brands recognizable industry wide. Midland is a supplier of brass fittings, valves, and accessories for hose, pipe and tube in brass, bronze, stainless steel, steel, malleable iron, and plastics.

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