S1891-12S – Textron Aviation OEM Hose Clamp
Available now on the Airparts.aero Marketplace.
Overview
The S1891-12S is a premium, all-stainless steel, genuine Textron Aviation OEM worm-drive hose clamp. The "S" suffix designates a superior level of material specification, indicating that every component of the clamp—the band, the housing, and the screw—is made from high-grade stainless steel. This construction provides maximum resistance to heat, corrosion, and environmental degradation, making it the ideal choice for demanding applications firewall forward and in other high-stress areas of the airframe. Engineered to provide a strong and reliable 360-degree seal, the S1891-12S is the certified clamp for ensuring the integrity of fluid lines and ducts on numerous Cessna and Beechcraft aircraft.
Key Features
- All-Stainless Steel Construction: Every component, including the band, saddle, housing, and screw, is fabricated from high-grade stainless steel. This provides superior corrosion resistance compared to standard clamps with plated steel screws, ensuring longevity and reliability.
- Enhanced Durability: The all-stainless design makes this clamp particularly suited for the high-temperature, high-vibration environment of the engine compartment and for aircraft operating in corrosive marine or agricultural environments.
- Proven Worm-Drive Mechanism: Utilizes a high-strength, precision-engineered worm-gear drive for applying smooth, consistent, and high-force clamping pressure, ensuring a leak-proof seal on a variety of hose types.
- Rolled Band Edges: Features smooth, rolled band edges to prevent the clamp from cutting into and damaging the hose material during tightening and throughout its service life, which is a critical feature for aviation-grade clamps.
- Genuine OEM Part: As a genuine Textron Aviation part, it guarantees the specific stainless steel alloys and manufacturing quality required for use on their certified aircraft, ensuring full compliance and airworthiness.
Technical Specifications
- Part Number: S1891-12S
- Component Type: All-Stainless Steel Worm-Drive Hose Clamp
- SAE Size Equivalent: #12
- Band, Housing & Screw Material: Stainless Steel
- Screw Head Type: 5/16" Hex Head with Screwdriver Slot
- Effective Diameter Range: 11/16 inch to 1-1/4 inches (0.687 to 1.250 inches)
- Band Width: 1/2 inch
Aircraft Compatibility
The S1891-12S is specified by Textron Aviation for applications where superior heat and corrosion resistance are required. It is used across a wide variety of their aircraft platforms. Always consult the specific aircraft's Illustrated Parts Catalog (IPC) to verify the correct part number for the intended location.
- Common Applications:
- Firewall Forward: Securing fluid lines (oil, fuel vent), engine baffle seals, and intake/airbox ducting inside the engine compartment.
- Exhaust Systems: Used in some applications for securing heat shields and shrouds.
- Corrosive Environments: The preferred clamp for aircraft operating in saltwater/marine environments (including amphibious aircraft) or agricultural roles.
- High-Performance Aircraft: Specified for use on various Cessna Citation jet and turboprop models.
Applications
The S1891-12S is the top-tier choice for the most demanding clamping tasks:
- Critical Fluid Lines: Securing oil and fuel hoses where a failure due to corrosion is not an option.
- Induction & Turbocharger Ducts: Clamping flexible connectors in high-temperature induction systems.
- Long-Term Reliability: Ideal for any location where maximum durability and a long, maintenance-free service life are the primary considerations.
Why Choose S1891-12S?
When a hose clamp is located in a hot, corrosive, or inaccessible area, its long-term reliability is paramount. The S1891-12S provides a significant upgrade in durability over standard clamps. The all-stainless steel construction prevents the screw from rusting or seizing, ensuring the clamp can be properly serviced if needed and that its clamping force will not degrade due to corrosion. By choosing the genuine Textron Aviation S1891-12S, you are selecting the highest quality OEM part available for the most critical applications.
Order Your S1891-12S Hose Clamps Now
For the ultimate in durability and corrosion resistance, choose genuine OEM hardware. Visit Airparts.aero to order your Textron Aviation S1891-12S all-stainless steel hose clamps today.
The specification of an all-stainless steel clamp like the S1891-12S is an explicit engineering choice to mitigate specific failure modes. In a standard clamp, the carbon steel screw is the component most susceptible to corrosion. Once corroded, the screw can become difficult to properly torque, or it can fail under load. By manufacturing the screw, housing, and band from stainless steel, the S1891-12S eliminates the weakest link, creating a uniformly robust and corrosion-resistant assembly. This makes it particularly suitable for firewall forward applications where it is exposed to engine heat, moisture, and potentially corrosive blow-by gases, ensuring its integrity throughout the engine's TBO cycle.
