STD2249 - Lycoming OEM Slotted Hex Castle Nut 1/4-20 UNC .250-20
The STD2249 is a high-quality slotted hex castle nut, specifically designed for use in Lycoming engines and other critical aerospace applications. This nut features a 1/4-20 UNC thread size (.250-20) and is engineered to provide secure and reliable fastening in environments where vibration and stress are significant factors. As an OEM part, the STD2249 is manufactured to Lycoming's rigorous standards, ensuring compatibility and performance in even the most demanding aviation conditions.
Specifications:
- Material: High-strength, corrosion-resistant steel
- Thread Size: 1/4-20 UNC (.250-20)
- Type: Slotted hex castle nut
- Finish: Zinc plated or cadmium plated for enhanced corrosion resistance
- Height: 0.281 inches (7.14 mm)
- Width Across Flats: 0.438 inches (11.13 mm)
- Compliance: Meets AN (Army-Navy) and NAS (National Aerospace Standards)
- Certification: Supplied with full traceability and OEM certification documentation
Features:
- OEM Quality: Manufactured by Lycoming to original equipment manufacturer (OEM) standards, ensuring perfect compatibility and reliable performance in Lycoming engines.
- Slotted Castle Design: The slotted design allows for the use of a cotter pin, ensuring the nut remains securely in place even under high vibration and stress conditions typical in aerospace environments.
- Corrosion Resistance: Constructed from corrosion-resistant steel with a protective zinc or cadmium plating, the STD2249 nut is designed for long-term durability in harsh conditions.
- Precision Fit: Engineered to exact specifications, ensuring a secure fit with .250-20 bolts, minimizing the risk of loosening during operation.
- Versatile Application: Ideal for use in a wide range of aerospace assemblies, including both structural and non-structural applications, where secure fastening is essential.
The STD2249 Lycoming OEM Slotted Hex Castle Nut is an essential component in ensuring the secure fastening of critical aircraft parts. Designed with a 1/4-20 UNC thread size (.250-20), this nut is particularly suited for use in Lycoming engines, where reliability and durability are paramount. The slotted castle design allows for the use of a cotter pin, which prevents the nut from loosening under high vibration and stress, a common challenge in aerospace applications.
Manufactured to strict OEM standards, the STD2249 nut is made from high-strength, corrosion-resistant steel, with either a zinc or cadmium plating for additional protection against environmental factors. Whether used in structural or non-structural assemblies, this nut provides the precision and reliability required to maintain the safety and integrity of your aircraft. Available now at AirParts.Aero, the STD2249 comes with full certification and traceability, ensuring its compliance with industry standards and its suitability for the most demanding aerospace environments.
SPECIFICATIONS
• Thread Size: 1/4-20
• Thread Type: UNC
Suitable For Use With the following series engines:
- AEIO-320
- EIO-360
- AEIO-540
- AIO-320
- AIO-360
- HIO-360
- HIO-360
- HIO-540
- IO-320
- IO-360
- IO-54
- IO-720
- IVO-360
- LIHO-424
- LIO-320
- LIO-360
- LO-360
- LTIO-540
- LTO-360
- O-235
- O-290
- O-320
- O-340
- O-360
- O-540
- TIGO-541
- TIO-360
- TIO-540
- TIO-541
- TO-360
- VO-360
| Specifications | |
|---|---|
| Cage Code | 80254 |
| ECCN / USML | 9A991.d |
| FAA Approval Code | PC |
| Hazmat Code | N |
| 8130-3 Eligible | Yes |