SAE Standard Carbon & Stainless Steel O-Ring Boss Hydraulic Adapters - Durable & High-Pressure
SAE Standard Carbon Steel and Stainless Steel O-Ring Boss Hydraulic Adapters are precision-engineered connectors designed for high-pressure hydraulic systems. Featuring a robust O-Ring Boss sealing mechanism, these adapters ensure leak-free performance in demanding environments. Crafted from corrosion-resistant carbon steel or stainless steel, they deliver exceptional durability, compatibility with SAE standards (J514/ISO 11926), and versatility across industrial, automotive, and heavy machinery applications.
Description
Our company has a very complete range of O-ring boss hydraulic adapter items and different thread matching items:
1O
1DO9
1FO4
6808Why Choose Our NINGBO NINGJI YULI FLUID EQUIPMENT CO., LTD O-Ring Boss Hydraulic Adapters?
Proven Reliability: Rigorously pressure-tested to ensure zero failures in real-world conditions.
Global Compatibility: Designed to integrate seamlessly with SAE, DIN, and JIS hydraulic systems.
Cost Efficiency: Extended service life reduces replacement frequency and operational expenses.
Custom Solutions: Tailored finishes, materials, and O-Ring compounds available for specialized needs.
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Engineered for performance and longevity, our SAE Standard O-Ring Boss Hydraulic Adapters are the go-to solution for industries prioritizing safety, efficiency, and durability. Whether for heavy machinery, automotive systems, or critical fluid transfer applications, these adapters deliver unmatched sealing integrity and pressure resilience. Explore our range today to enhance your hydraulic system’s reliability.
Technical Data

1. UNO Male X UNO Adjustable Male Straight Adaptor/1O
| Thread A | Thread B | Part No | L | E | F | H1 | ||
| Dash | UNO | Dash | UNO | mm | mm | mm | mm | |
| -09 | 9/16-18 | -09 | 9/16-18 | 1O-0909 | 40 | 10 | 10 | 17.46 |
| -12 | 3/4-16 | -12 | 3/4-16 | 1O-1212 | 45 | 11 | 11 | 22.23 |
| -14 | 7/8-14 | -14 | 7/8-14 | 1O-1414 | 52 | 13 | 13 | 25.40 |

2. DKL Metric Male X UNO Male 90 Degree Elbow/1DO9
| Thread A | Thread B | Part No | E | F | S1 | ||
| Dash | DKL | Dash | UNO | mm | mm | mm | |
| -14 | M14x1.5 (08L) | -07 | 7/16x20 | 1CO9-1407 | 23 | 19 | 14 |
| -14 | M14x1.5 (08L) | -09 | 9/16x18 | 1CO9-1409 | |||
| -16 | M16x1.5 (10L) | -09 | 9/16x18 | 1CO9-1609 | 24 | 24 | 19 |
| -18 | M18x1.5 (12L) | -09 | 9/16x18 | 1CO9-1809 | 26 | 25 | 19 |
| -18 | M18x1.5 (12L) | -12 | 3/4x16 | 1CO9-1812 | 26 | 25 | 19 |
| -22 | M22x1.5 (15L) | -12 | 3/4x16 | 1CO9-2212 | 28 | 28 | 22 |
| -22 | M22x1.5 (15L) | -14 | 7/8x14 | 1CO9-2214 | 28 | 28 | 22 |
| -22 | M22x1.5 (15L) | -14 | 7/8x14 | 1CO9-2217 | |||
| -26 | M26x1.5 (18L) | -14 | 7/8x14 | 1CO9-2614 | 31 | 32 | 27 |
| -30 | M30x2 (22L) | -14 | 7/8x14 | 1CO9-3014 | |||
| -30 | M30x2 (22L) | -17 | 1.1/16x12 | 1CO9-3017 | 35 | 35 | 30 |
| -30 | M30x2 (22L) | -21 | 1.5/16x12 | 1CO9-3021 | |||
| -36 | M36x2 (28L) | -17 | 1.1/16x12 | 1CO9-3617 | |||
| -36 | M36x2 (28L) | -21 | 1.5/16x12 | 1CO9-3621 | 38 | 42 | 36 |
| -45 | M45x2 (35L) | -26 | 1.5/8x12 | 1CO9-4526 | 48 | 46 | 50 |

3. ORFS Male X UNO Male 45 Degree Elbow /1FO4
| Thread A | Thread B | Part No | E | F | S1 | H | ||
| Dash | ORFS | Dash | UNO | mm | mm | mm | mm | |
| -09 | 9/16-18 | -07 | 7/16-20 | 1FO4-0907 | 16 | 30 | 14 | 15.9 |
| -09 | 9/16-18 | -09 | 9/16-18 | 1FO4-0909 | 17 | 33 | 19 | 19.1 |
| -11 | 11/16-16 | -07 | 7/16-20 | 1FO4-1107 | 19 | 31 | 19 | 15.9 |
| -11 | 11/16-16 | -09 | 9/16-18 | 1FO4-1109 | 19 | 33 | 19 | 19.1 |
| -11 | 11/16-16 | -12 | 3/4-16 | 1FO4-1112 | 19 | 36 | 19 | 23.8 |
| -11 | 11/16-16 | -14 | 7/8-14 | 1FO4-1114 | 19 | 45 | 27 | 27.0 |
| -13 | 13/13-16 | -09 | 9/16-19 | 1FO4-1309 | 20 | 33 | 19 | 19.1 |
| -13 | 13/16-16 | -12 | 3/4-16 | 1FO4-1312 | 20 | 36 | 19 | 23.8 |
| -13 | 13/16-16 | -14 | 7/8-14 | 1FO4-1314 | 21 | 45 | 27 | 27.0 |
| -16 | 1-14 | -12 | 3/4-16 | 1FO4-1612 | 22 | 50 | 30 | 34.9 |
| -16 | 1-14 | -14 | 7/8-14 | 1FO4-1614 | 23 | 45 | 27 | 27.0 |
| -19 | 1.3/16-12 | -14 | 7/8-14 | 1FO4-1914 | 26 | 50 | 27 | 27.0 |
| -19 | 1.3/16-12 | -17 | 1.1/16-12 | 1FO4-1917 | 26 | 50 | 31 | 34.9 |
| -19 | 1.3/16-12 | -21 | 1.5/16-12 | 1FO4-1921 | 29 | 52 | 37 | 41.3 |
| -23 | 1.7/16-12 | -21 | 1.5/16-12 | 1FO4-2321 | 30 | 52 | 37 | 41.3 |
| -27 | 1.11/16-12 | -26 | 1.5/8-12 | 1FO4-2726 | 32 | 54 | 41 | 47.6 |
| -27 | 1.11/16-12 | -30 | 1.7/8-12 | 1FO4-2730 | 33 | 54 | 47 | 54.0 |
| -32 | 2-12 | -30 | 1.7/8-12 | 1FO4-3230 | 37 | 54 | 47 | 54.0 |
Details
O-ring Boss Hydraulic Adapter Advantages:
1. Superior Leak Prevention
The O-Ring Boss design creates a double-seal mechanism (metal-to-metal contact + compressed O-Ring) to eliminate fluid/gas leakage, even under pressure spikes.
2. High-Pressure Resistance
Withstands up to 10,000 PSI (depending on material and size), making them suitable for heavy-duty hydraulic applications.
3. Corrosion Resistance
Stainless steel variants offer excellent protection against rust, oxidation, and chemical exposure, while carbon steel adapters are zinc-plated for enhanced durability.
4. Easy Installation
Simplified assembly with standardized SAE threads reduces downtime and maintenance costs.
5. Wide Temperature Range
Performs reliably in temperatures from -65°F to +400°F (-54°C to +204°C), ensuring functionality in extreme climates.
6. SAE/ISO Compliance
Manufactured to SAE J514 and ISO 11926 standards for guaranteed compatibility with global hydraulic systems.
O-ring Boss Hydraulic Adapter Features:
1. Material Options
Carbon Steel: Zinc-plated for corrosion resistance, cost-effective for general-purpose use.
Stainless Steel (304/316): Superior chemical and temperature resistance for critical environments.
2. Precision Threading
SAE straight threads (ORB) ensure secure connections without cross-threading risks.
3. O-Ring Compatibility
Pre-installed with high-quality Buna-N, Viton, or Nitrile O-Rings (customizable upon request).
4. Surface Finish
Smooth, deburred surfaces minimize wear on seals and extend product lifespan.
5. Size Range
Available in 1/8" to 2" NPT, JIC, and metric thread sizes to fit diverse hydraulic configurations.
6. Certifications
7. RoHS-compliant and tested to meet ISO 9001 quality standards.
Application
O-ring Boss Hydraulic Adapter Applications:
1. Hydraulic Systems
Ideal for connecting hoses, pipes, and components in high-pressure hydraulic circuits for construction equipment, agricultural machinery, and industrial tools.
2. Automotive Industry
Used in brake lines, power steering systems, and fuel delivery networks to ensure reliable sealing under extreme pressure and vibration.
3. Oil & Gas Equipment
Deployed in drilling rigs, pumps, and pipelines where resistance to harsh chemicals and high-temperature fluids is critical.
4. Aerospace & Defense
Trusted for hydraulic and pneumatic systems requiring lightweight yet durable fittings with fail-safe sealing.
5. Manufacturing Machinery
Ensures efficient fluid transfer in CNC machines, presses, and automation systems.

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