AN315-5R Aircraft Castle Hex Nut (1/2"-20 UNF, Unslotted)

When you need an unyielding and positively secured fastening solution, the AN315-5R Aircraft Castle Hex Nut is the industry-standard choice. Engineered to meet stringent Aeronautical Standard (AN) specifications, this high-quality, cadmium-plated steel nut is designed for applications where vibration, stress, and safety are paramount.

The AN315-5R is specifically a castle hex nut, meaning it features a castellated (notched) top that allows for the insertion of a cotter pin (e.g., MS24665 series) through a drilled bolt shank. This mechanical locking method prevents the nut from rotating loose, even under extreme conditions, providing an unparalleled level of security. Unlike the "slotted" AN310 series, the AN315 is "unslotted" at the top of the castle, which can be preferred in certain assemblies or when the cotter pin will be installed through a specific hole in the bolt.

With a 1/2"-20 UNF-2B thread, it's designed to mate perfectly with corresponding 1/2"-20 UNF bolts (e.g., AN8-series bolts), ensuring a precise and strong connection. The cadmium plating offers superior corrosion resistance, crucial for aerospace, marine, and other environments exposed to harsh elements.

Key Features & Benefits:

• Aircraft Grade (AN) Certified: Manufactured and inspected to the rigorous Aeronautical Standard (AN) specifications, guaranteeing superior quality, consistency, and performance in critical applications.

• Positive Locking Mechanism: Features a castellated design for use with a cotter pin, providing a secure mechanical lock that prevents loosening due to vibration or torque.

• High-Strength Steel: Constructed from durable alloy steel, offering excellent tensile strength and resistance to stripping or deformation under high loads.

• Cadmium Plated Finish: Protected with a cadmium plating (QQ-P-416, Type II, Class 3) for exceptional corrosion resistance, extending the life of your assemblies in challenging environments.

• Precision Threads: Accurately formed 1/2"-20 UNF-2B threads ensure a tight, reliable fit with compatible bolts.

• Unslotted Castle Design: Specifically an unslotted castle type, offering specific installation benefits in certain configurations.

• Versatile Applications: Essential for aircraft airframes, engines, landing gear, and equally vital for high-performance automotive, marine, heavy machinery, and industrial applications where ultimate security is non-negotiable.

Ensure the highest level of safety and reliability in your builds. Choose the AN315-5R Aircraft Castle Hex Nut for a proven and dependable fastening solution.

Technical Specifications:

• Part Number: AN315-5R

• Type: Aircraft Castle Hex Nut (Unslotted)

• Material: Alloy Steel

• Finish: Cadmium Plating (QQ-P-416, Type II, Class 3)

   

• Thread Size: 1/2"-20 UNF-2B

• Nominal Diameter: 1/2"

• Recommended Cotter Pin: Typically MS24665-276 (or similar 1/8" x 1-3/4" size)