Filter by
System of Measurement
Fitting Connection
Fitting Type
Thread Type
Connects To
Length
Maximum Temperature
Nut Material
Maximum Pressure @ Temperature
Minimum Temperature
REACH
Fabrication
Specifications Met
DFARS Specialty Metals
Export Control Classification Number (ECCN)
For Tube Fabrication
About Measuring Fittings
%20--%3e%3csvg%20version='1.1'%20id='Layer_1'%20xmlns='http://www.w3.org/2000/svg'%20xmlns:xlink='http://www.w3.org/1999/xlink'%20x='0px'%20y='0px'%20viewBox='0%200%20400%20400'%20style='enable-background:new%200%200%20400%20400;'%20xml:space='preserve'%3e%3cstyle%20type='text/css'%3e%20.st0{fill:%231A70A0;}%20.st1{opacity:0.5;}%20%3c/style%3e%3cg%3e%3cg%3e%3cpath%20class='st0'%20d='M200,56.9c38.35,0,74.4,14.93,101.51,42.05c27.11,27.11,42.05,63.17,42.05,101.51s-14.93,74.4-42.05,101.51%20S238.35,344.02,200,344.02s-74.4-14.93-101.51-42.05c-27.11-27.11-42.05-63.17-42.05-101.51s14.93-74.4,42.05-101.51%20S161.65,56.9,200,56.9%20M200,12.9C96.41,12.9,12.44,96.88,12.44,200.46c0,103.59,83.97,187.56,187.56,187.56%20c103.59,0,187.56-83.97,187.56-187.56C387.56,96.88,303.59,12.9,200,12.9L200,12.9z'/%3e%3c/g%3e%3cg%3e%3cg%20class='st1'%3e%3cpath%20class='st0'%20d='M235.49,152.24h16.15l-27.46,111.87c-1.94,7.8-2.91,12.5-2.91,14.1c0,1.82,0.58,3.29,1.73,4.41%20c1.16,1.12,2.69,1.68,4.61,1.68c5.23,0,11.78-3.85,19.63-11.55l17.22,21.34c-16.95,17.33-34.87,26-53.78,26%20c-8.37,0-15.45-1.47-21.23-4.41c-5.79-2.94-10.44-7.25-13.95-12.92c-3.51-5.67-5.27-11.18-5.27-16.53c0-1.93,0.35-5.24,1.05-9.94%20c1-6.94,2.05-12.54,3.15-16.82l15.22-62.15h-32.69l7.65-30.97C190.89,163.58,214.53,158.88,235.49,152.24z%20M230.44,80.84%20c8.24,0,14.66,2.62,19.26,7.86c4.6,5.24,6.9,11.55,6.9,18.94c0,5.46-1.42,10.7-4.25,15.73c-2.83,5.03-6.88,9.07-12.12,12.12%20c-5.24,3.05-10.33,4.57-15.24,4.57c-4.6,0-9.17-1.23-13.72-3.69c-4.55-2.46-8.02-5.78-10.43-9.95%20c-2.41-4.17-3.61-8.67-3.61-13.48c0-5.35,1.52-10.64,4.57-15.89c3.05-5.24,7.03-9.25,11.96-12.04%20C218.68,82.23,224.24,80.84,230.44,80.84z'/%3e%3c/g%3e%3cg%3e%3cpath%20class='st0'%20d='M214.08,152.24h16.15l-27.46,111.87c-1.94,7.8-2.91,12.5-2.91,14.1c0,1.82,0.58,3.29,1.73,4.41%20c1.16,1.12,2.69,1.68,4.61,1.68c5.23,0,11.78-3.85,19.63-11.55l17.22,21.34c-16.95,17.33-34.87,26-53.78,26%20c-8.37,0-15.45-1.47-21.23-4.41c-5.79-2.94-10.44-7.25-13.95-12.92c-3.51-5.67-5.27-11.18-5.27-16.53c0-1.93,0.35-5.24,1.05-9.94%20c1-6.94,2.05-12.54,3.15-16.82l15.22-62.15h-32.69l7.65-30.97C169.48,163.58,193.11,158.88,214.08,152.24z%20M209.03,80.84%20c8.24,0,14.66,2.62,19.26,7.86c4.6,5.24,6.9,11.55,6.9,18.94c0,5.46-1.42,10.7-4.25,15.73c-2.83,5.03-6.88,9.07-12.12,12.12%20c-5.24,3.05-10.33,4.57-15.24,4.57c-4.6,0-9.17-1.23-13.72-3.69c-4.55-2.46-8.02-5.78-10.43-9.95%20c-2.41-4.17-3.61-8.67-3.61-13.48c0-5.35,1.52-10.64,4.57-15.89c3.05-5.24,7.03-9.25,11.96-12.04%20C197.26,82.23,202.83,80.84,209.03,80.84z'/%3e%3c/g%3e%3c/g%3e%3c/g%3e%3c/svg%3e){kind=small}
Measure the threaded ends of your fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.
Nuts for 45° Flared Fittings for Copper and Brass Tubing
(A) Short Nut
(B) Short Nut
(A) Long Nut
- For Use With: Air, Cutting Oil, Diesel Fuel, Fuel Oil, Mineral Oil, Refrigerant, Water; except nuts for 1" tube OD are not for use with fuel oil
- Temperature Range: -65° to 250° F
- Tubing: Use with seamless brass and copper that meets ASTM B280
- Specifications Met: SAE J512, SAE J513, UL Listed; except nuts for 1" tube OD meet SAE J512 and SAE J513 only
Use these nuts with 45° flared tube fittings to provide a tight metal-to-metal seal on flared copper and brass tubing. Nuts are brass for good corrosion resistance. They don’t require a sleeve, which makes for a fast, convenient installation.
Long nuts support more of the tube’s surface area than short nuts for a strong grip in high-vibration applications.
For Tube | |||||||
|---|---|---|---|---|---|---|---|
| OD | Wall Thick. | Nut Material | Max. Pressure | Lg. | Each | ||
Short Nuts  | |||||||
| A | 1/8" | 0.03" | Brass | 2,800 psi @ 72° F | 1/2" | 50635K649 | 00000 |
| A | 3/16" | 0.035" | Brass | 1,900 psi @ 72° F | 5/8" | 50635K561 | 0000 |
| A | 1/4" | 0.049" | Brass | 1,400 psi @ 72° F | 3/4" | 50635K562 | 0000 |
| A | 5/16" | 0.049" | Brass | 1,200 psi @ 72° F | 7/8" | 50635K563 | 0000 |
| A | 3/8" | 0.032" | Brass | 1,000 psi @ 72° F | 29/32" | 50635K651 | 0000 |
| A | 3/8" | 0.065" | Brass | 1,000 psi @ 72° F | 1" | 50635K564 | 0000 |
| A | 1/2" | 0.032" | Brass | 750 psi @ 72° F | 1" | 50635K652 | 0000 |
| A | 1/2" | 0.083" | Brass | 750 psi @ 72° F | 1 1/8" | 50635K565 | 0000 |
| A | 5/8" | 0.035" | Brass | 650 psi @ 72° F | 1 1/16" | 50635K653 | 0000 |
| A | 5/8" | 0.095" | Brass | 650 psi @ 72° F | 1 5/16" | 50635K566 | 0000 |
| A | 3/4" | 0.035" | Brass | 550 psi @ 72° F | 1 5/32" | 50635K654 | 0000 |
| A | 3/4" | 0.109" | Brass | 550 psi @ 72° F | 1 1/2" | 50635K567 | 00000 |
| A | 7/8" | Not Rated | Brass | 450 psi @ 72° F | 1 5/8" | 50635K16 | 00000 |
| A | 1" | 0.035" | Brass | 350 psi @ 73° F | 1 13/16" | 50635K721 | 00000 |
| B | 1/4" | 0.03" | Brass | 1,400 psi @ 72° F | 5/8" | 50635K66 | 0000 |
| B | 1/2" | 0.032" | Brass | 750 psi @ 72° F | 27/32" | 50635K663 | 0000 |
| B | 5/8" | 0.035" | Brass | 650 psi @ 72° F | 31/32" | 50635K664 | 0000 |
Long Nuts | |||||||
| A | 1/8" | 0.03" | Brass | 2,800 psi @ 72° F | 3/4" | 50635K655 | 0000 |
| A | 3/16" | 0.035" | Brass | 1,900 psi @ 72° F | 13/16" | 50635K551 | 0000 |
| A | 1/4" | 0.049" | Brass | 1,400 psi @ 72° F | 15/16" | 50635K552 | 0000 |
| A | 5/16" | 0.049" | Brass | 1,200 psi @ 72° F | 1 1/8" | 50635K553 | 0000 |
| A | 3/8" | 0.065" | Brass | 1,000 psi @ 72° F | 1 5/16" | 50635K554 | 0000 |
| A | 1/2" | 0.083" | Brass | 750 psi @ 72° F | 1 5/8" | 50635K555 | 0000 |
| A | 5/8" | 0.095" | Brass | 650 psi @ 72° F | 1 7/8" | 50635K556 | 00000 |
| A | 3/4" | 0.109" | Brass | 550 psi @ 72° F | 2 3/16" | 50635K557 | 00000 |