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Thumbnail Filmstrip of 3105-14 | 7/8" Inverted Flare Tube Nut (Steel) Images
Typical Application:
Hydraulic Brake, Power Steering, Fuel Lines and Transmission Cooler Lines, LP and Natural Gas
Working Temperatures 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:
Vibration:
Excellent Resistance
Temperature Range:
-65°F to +250°F (-35°C - +121°C) range at maximum operating temperatures.
Used With:
Copper, Brass, Aluminum and Steel Hydraulic tubing that can be flared.
Advantages:
Very low cost and re-useable. Seats and threads are internal and protected. Compact, excellent vibration life. Short nut affords very close tube bends. Steel or Brass tube nut.
Tolerance:
+/- 0.03 on all dimensions.
Conformance:
Meets specifications and standards of ASA, ASME, SAE and MS (Military Standards).
Assembly Instructions:
1. Cut tubing to desired length. Make sure all burrs are removed and the ends are cut square.
2. Slide nut on tube. Threaded end "A" of nut must face out.
3. Flare end of tube with a 45° 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.
5. Tighten assembly with wrench until a solid feeling is encountered. From that point, apply a one-sixth turn.
Note: Do not over-torque as it may damage the fitting or split the tubing at the flare.
Hydraulic Brake, Power Steering, Fuel Lines and Transmission Cooler Lines, LP and Natural Gas
Working Temperatures 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:
Vibration:
Excellent Resistance
Temperature Range:
-65°F to +250°F (-35°C - +121°C) range at maximum operating temperatures.
Used With:
Copper, Brass, Aluminum and Steel Hydraulic tubing that can be flared.
Advantages:
Very low cost and re-useable. Seats and threads are internal and protected. Compact, excellent vibration life. Short nut affords very close tube bends. Steel or Brass tube nut.
Tolerance:
+/- 0.03 on all dimensions.
Conformance:
Meets specifications and standards of ASA, ASME, SAE and MS (Military Standards).
Assembly Instructions:
1. Cut tubing to desired length. Make sure all burrs are removed and the ends are cut square.
2. Slide nut on tube. Threaded end "A" of nut must face out.
3. Flare end of tube with a 45° 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.
5. Tighten assembly with wrench until a solid feeling is encountered. From that point, apply a one-sixth turn.
Note: Do not over-torque as it may damage the fitting or split the tubing at the flare.
Questions & Answers
Popular Questions
The numbers on hydraulic fittings refer to the size and type of the fittings. They can indicate the fitting's thread size, pitch, and compatibility with other components. This information was sourced from "Hydraulic Hose Fittings Guide: How to Find the Right One" on the Hydraulics Direct website (https://www.hydraulicsdirect.com/Unde...), specifically under the sections "Understanding the Numbers" and "Choosing the Right Fitting".
The standard for hydraulic fittings is typically governed by organizations such as the International Organization for Standardization (ISO) and the Society of Automotive Engineers (SAE). Common standards include ISO 8434 for metallic tube connections and SAE J516 for hydraulic hose fittings, which ensure compatibility, reliability, and safety in hydraulic systems.
To understand hydraulic fittings, familiarize yourself with their types, such as flare, O-ring, and pipe fittings, and their purposes, like connecting hydraulic components and ensuring leak-free systems. Recognize the importance of matching fittings to their pressure ratings and material compatibility to maintain system integrity and performance.
To determine the correct size hydraulic fitting, measure the outer diameter (OD) of the fitting's threads and the pitch (distance between threads) using calipers and a thread pitch gauge. Consult a sizing chart or the manufacturer's specifications to match these measurements to the appropriate fitting size.
To identify types of hydraulic fittings, you can look at the thread type (such as NPT, BSP, or metric), the sealing method (like O-ring, metal-to-metal, or tapered), and the fitting shape (such as elbow, tee, or straight). Additionally, checking the manufacturer's specifications and using a thread gauge can help ensure accurate identification.
Teflon tape is generally not recommended for use on hydraulic fittings. Hydraulic systems typically rely on metal-to-metal sealing surfaces or O-ring seals, and using Teflon tape can introduce debris into the system, potentially leading to leaks or damage. It is better to use thread sealants specifically designed for hydraulic systems if needed.
The pressure rating for saturated steam for the 1/2" NPT Female Tee is 150 PSI at 350°F. This ensures the fitting can handle high-pressure steam applications effectively. Additionally, the fitting's durable low-temperature galvanizing process and 100% pressure testing to 300# Class provide enhanced longevity and reliability.
