DELPHI FITTINGS
Product Overview
Viton® (FKM) O-rings sized for SAE ORB ports, offering enhanced chemical resistance and higher temperature tolerance compared to Buna-N. This product is supplied for ORB hydraulic sealing and service when the correct configuration, material, and mating components have been selected.
Key Features & Specifications
| Material | FKM (Viton®) elastomer |
|---|---|
| Connection Configuration | SAE O-ring boss |
| Reference Standard / System | SAE O-ring boss sealing component |
| Plating & Finish | Cr3+ Trivalent Zinc Clear (ASTM B117 salt spray tested) |
| Port Standard | SAE J1926-1 / ISO 11926-1 (SAE Straight Thread O-Ring Boss) |
| Sealing Mechanism | Radial/Axial Elastomeric O-Ring Seal into Port Chamfer |
Commonly Available Sizes (Part #OB2 Series Series)
Delphi Fittings manufactures standard and jump port sizes for Part OB2 Series. Thread dimensions, port specifications, and hex sizes for standard production series are detailed below:
| Dash Size | ORB Port Thread | Nominal Tube O.D. | AS568 Size # | Material Grade |
|---|---|---|---|---|
| -02 | 5/16-24 UNF | 1/8" | AS568-902 | Viton® FKM 90 Duro |
| -03 | 3/8-24 UNF | 3/16" | AS568-903 | Viton® FKM 90 Duro |
| -04 | 7/16-20 UNF | 1/4" | AS568-904 | Viton® FKM 90 Duro |
| -05 | 1/2-20 UNF | 5/16" | AS568-905 | Viton® FKM 90 Duro |
| -06 | 9/16-18 UNF | 3/8" | AS568-906 | Viton® FKM 90 Duro |
| -08 | 3/4-16 UNF | 1/2" | AS568-908 | Viton® FKM 90 Duro |
| -10 | 7/8-14 UNF | 5/8" | AS568-910 | Viton® FKM 90 Duro |
| -12 | 1-1/16-12 UN | 3/4" | AS568-912 | Viton® FKM 90 Duro |
| -14 | 1-3/16-12 UN | 7/8" | AS568-914 | Viton® FKM 90 Duro |
| -16 | 1-5/16-12 UN | 1" | AS568-916 | Viton® FKM 90 Duro |
| -20 | 1-5/8-12 UN | 1-1/4" | AS568-920 | Viton® FKM 90 Duro |
| -24 | 1-7/8-12 UN | 1-1/2" | AS568-924 | Viton® FKM 90 Duro |
| -32 | 2-1/2-12 UN | 2" | AS568-932 | Viton® FKM 90 Duro |
Need non-standard dash combinations, jump port sizes, alternative elastomer seal compounds (EPDM / HNBR / Viton® FKM), or custom alloy runs? Delphi manufactures custom hydraulic adapters to customer blueprint.
Specific Applications & Hydraulic Circuit Routing
Part OB2 Series fittings provide leak-free fluid power conveyance in demanding mobile and stationary equipment circuits:
- Hydraulic Valve Manifolds & Blocks: Provides zero-clearance, leak-tight port connections on mobile and industrial hydraulic manifold blocks utilizing Part OB2 Series.
- Pumps, Motors & Cylinders: Connects fluid power lines directly to SAE straight-thread ORB ports on gear pumps, piston motors, and hydraulic cylinders.
- Thermal Cycling & High Vibration Systems: Elastomeric O-ring maintains full seal integrity where tapered pipe threads might back off or weep under intense machine vibration.
Installation & Assembly Guidance
- O-Ring Lubrication: Always inspect and lightly lubricate the elastomeric O-ring with clean system hydraulic fluid prior to thread engagement to avoid pinching or tearing.
- Straight Fitting Engagement: For straight fittings, hand-thread into the port until the hex shoulder bottoms firmly against the spotface, then torque to SAE J1926 specifications.
- Adjustable Fitting Orientation: For elbows and tees, back off the locknut and washer completely. Thread fitting into port until washer contacts face, then back out counter-clockwise (max 360°) to align, and tighten locknut.
- Dual Wrench Security: Hold the adapter body firmly with a backup wrench while securing mating hose swivel nuts or tube connections.
Why Source Part OB2 Series from Delphi Fittings?
- SAE J1926 & ISO 11926 Compliance: Precision CNC machined with precise O-ring retaining undercuts to ensure complete interchangeability with North American and European hydraulic equipment.
- ASTM B117 Superior Corrosion Resistance: Heavy trivalent zinc clear finish delivers exceptional protection against white and red rust in demanding outdoor and mobile environments.
- 100% Optical Thread Verification: All male and female threads undergo strict go/no-go optical gauge inspection to guarantee flawless field threading without binding.
- Factory-Direct OEM & Distributor Programs: Manufactured directly at our ISO 9001:2015 certified facility in Yuhuan, China, backed by mill test reports (MTR) and volume distributor pricing.
Get a Quote for Part OB2 Series - Viton® O-Ring for SAE ORB Adapters
Direct OEM container-load and distributor replenishment pricing, complete material test reports (MTR), and inspection samples available upon inquiry. Connect with our engineering sales team for rapid quotations and delivery schedules.
Complementary & Mating Hydraulic Fittings
Commonly paired with Part OB2 Series in hydraulic valve manifolds, power units, and industrial fluid power circuits:
