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20221 (20-221) by Midland | Flareless Fitting | Poly-Flo® Nut | 5/16" Tube OD | 7/16-24 Thread | Brass

20221 (20-221) by Midland | Flareless Fitting | Poly-Flo® Nut | 5/16" Tube OD | 7/16-24 Thread | Brass

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Midland Industries
Brass Fitting - Flareless Fitting - Poly-Flo® Nut - Brass

Flareless Brass Tube Fittings are Interchangeable with Poly-Flo®, Poly-Tite®, Poly-Line® and Poly-Fit®

Built-in SS Tube Support
Specifications for Variant SKU: 20221 Midland
Material(s): Brass
Applications: Pneumatic instrumentation circuits, lubricant and cooling lines. Used With: Aluminum & copper tubing. Hard plastic tubing requires brass sleeve. Not recommended for steel tubing.
SAE Rating: N/A Conformance: N/A
Vibration: Excellent Resistance. Temperature Range: Depends on tubing used.
-65°F to +250°F (-53°C to +121°C) with brass sleeve
-40°F to +150°F (-40°C to +66°C) with plastic sleeve. (Refer to tubing temperature range.)
Tolerance: +/- .02 on all dimensions. Lead Free: Not Lead Free

Working Pressure and Temperature Ranges:
  • Up to 150 PSI from 0°F to + 150°F with thermoplastic tubing. Up to 300 PSI from 0°F to + 175°F with soft metal tubing.
Maximum allowable metal tube wall thickness for use with Poly-Tite® fittings::
  • 1/8", 3/16" O.D. -- no limitation
  • 1/4" O.D.--.035 5/16", 3/8",1/2" O.D.--.049
Assembly Instructions:
  • 1) Cut tubing to desired length.
  • 2) Slide nut/sleeve assembly on tube. Threaded end "A" of nut must face toward fitting.
  • 3) Bottom tubing into fitting.
  • 4) Plastic sleeve - Tighten nut hand tight.
    Brass Sleeve - Tighten nut hand tight, then an additional 3/4 turn.
Tube OD 1/8" 3/16" 1/4" 5/16" 3/8" 1/2"
Thread Size - B 5/16-24 3/8-24 3/8-24 7/16-24 1/2-24 11/16-20

**Note: 1/8 and 3/16 sizes have brass sleeves**

Crossover Series:
MP61 261PFN 61PN 1261 261FPN
Part Number Tube O.D Thread A Hex (Dia.) Approx. Weight
(Lbs.)
20218
(20-218) 		1/8" 5/16-24 0.37" 0.37" 0.01
20220
(20-220) 		1/4" 3/8-24 0.34" 0.44" 0.02
20221
(20-221) 		5/16" 7/16-24 0.34" 0.50" 0.02
20222
(20-222) 		3/8" 1/2-24 0.38" 0.56" 0.04
20223
(20-223) 		1/2" 11/16-20 0.42" 0.81" 0.06

Dimension data can change without notice.

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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