1-1/2" ID X 1-3/4" OD X 1/8" HT
SFS Split Flange Seals
For 4-Bolt Split Flange Connectors
Flange seals are a one piece dual durometer urethane static seal. The black outer part is a tough, extrusion resistant 95 Durometer and the yellow inner layer is 57 Durometer that has low compression set and excellent sealing properties. These seals are a direct replacement for o-rings and do not require modification to any split flange groove.
Flange: 1-1/4"
Item Type: #20 Split Flange Seal
O-ring Size: -222
Actual Size: OD: 1.755" Thickness: .139
Material: 57/95 Durometer Urethane
Flange seals are a one piece dual durometer urethane static seal. The black outer part is a tough, extrusion-resistant 95 Durometer urethane, and the yellow inner layer is 57 Durometer with low compression set and excellent sealing properties. These seals are a direct replacement for o-rings and do not require modification to any split flange groove. For SAE J518 4-bolt Code 61/62 Split Flanges.
Product Overview (SFS‑20 for 4‑Bolt Split Flange Connectors)
Design & Construction
- One‑piece dual‑durometer urethane seal:
- Outer black layer: 95 Durometer – highly resistant to extrusion
- Inner yellow layer: 57 Durometer – low compression set, excellent sealing properties
- Drop‑in replacement for -222 O‑ring, meeting SAE J518 Code 61/62 split flange standards—no groove modification needed
- Nominal inner diameter (ID): 1.500″
- Nominal outer diameter (OD): 1.750″
- Nominal height (cross‑section thickness): 0.125″ (approx. 0.115–0.139″ measured)
- Actual OD listed as ~1.755″ and thickness ~0.139″ on some listings
Material and Performance
- Urethane material
- Temperature range: –40 °F to +200 °F (or up to +212 °F depending on spec sheet)
- Pressure range: 0–3000 psi (some sources note up to 6000 psi depending on sealing context)
- Static application only—not suitable for dynamic motion
- Shelf life: approx. 5 years, weight ~0.03 lb per unit
Compatibility
- Designed to fit SAE J518 4‑bolt split flange systems (Code 61/62)
- Matches flange size: 1¼″ in nominal terms
- Replaces O‑Ring Dash Size ‑222 (AS568 standard)
Why It Benefits You
| Customer Benefit | Explanation |
|---|
| Easy Installation | Slip in your existing -222 groove—no machining or redesign needed. |
| Reliable Sealing Performance | Dual‑durometer construction ensures resistance to extrusion while maintaining excellent seal integrity over time. |
| Temperature & Pressure Resilience | Wide operating range covers most hydraulic systems up to 200 °F and 3000–6000 psi. |
| Long‑Term Life & Shelf Stability | Urethane resists compression set; 5‑year shelf life gives flexibility in inventory. |
| Cost‑Effective | Priced competitively and available in volume—ideal for repeat purchasing with minimal overhead. |
Technical Summary
- Part Number: SFS‑20 (Universal Seal, also seen as Hercules part 5100041532)
- Replaces O‑Ring Dash: ‑222
- Nominal OD/ID/Height: 1.750″ OD / 1.500″ ID / 0.125″ (⅛″)
- Material: Dual-durometer urethane (95A outer / 57A inner)
- Temperature Range: –40 °F to +200 °F
- Pressure: Up to ~3000 psi (some configs rated 6000 psi static)
- Application: Static sealing on SAE J518 Code 61/62 split flange systems
Application Notes & Best Practices
- Double-check groove dimensions: Though nominal sizing should match -222 groove specs, verify your flange groove width (~0.11″ axial, ~0.165″ radial) to ensure proper seating and extrusion clearance
- Seal orientation matters: The black 95 durometer side must face outward to resist extrusion forces; the yellow 57 durometer face inward to seal.
- Static only: These aren’t meant for rotating or reciprocating assemblies—use them in stationary flange connections only.
Why Choose The O‑Ring Store LLC
As a small, ISO‑certified distributor based in Clarkston, WA, we built our business on one principle: making O‑rings easy. When you choose us for SFS‑20 or similar parts, you get:
- Deep technical expertise with flange seal sizing and material benefits
- Personalized service & inventory support—no “one‑size‑fits‑all” from big vendors
- ISO 9001:2015-controlled quality & traceability for product reliability
- Fast domestic shipping, backed by decades of parts and seal stocking experience
