AN960-516 Aircraft Grade Flat Washer (5/16" Bolt, Cadmium Plated Steel)

Every detail matters in critical assemblies, and the AN960-516 Aircraft Grade Flat Washer is designed to meet the highest standards of precision and reliability. Manufactured to Aeronautical Standard (AN) specifications, this flat washer is a fundamental component for aerospace, high-performance automotive, marine, and industrial applications where quality cannot be compromised.

The AN960-516 is specifically sized for use with 5/16" diameter bolts or screws, providing a crucial interface between the fastener head or nut and the material being joined. Its primary functions include:

• Providing a Smooth Bearing Surface: Prevents marring or damage to the surface of the assembly when tightening bolts and nuts.

   

• Load Distribution: Spreads the clamping force over a wider area, reducing stress concentrations and preventing deformation of softer materials.

   

• Shimming/Adjusting Grip Length: Used as a shim to achieve the correct grip length for bolt and nut assemblies, ensuring proper thread engagement and preventing the nut from bottoming out on the bolt shank.

   

• Cotter Pin Alignment: Essential for properly positioning castellated (castle) nuts like AN310 or AN315 series in relation to the cotter pin holes in bolts.

   

Crafted from high-quality carbon steel and finished with cadmium plating, the AN960-516 offers excellent corrosion resistance, making it suitable for demanding environments where exposure to moisture and other corrosive elements is a concern. Its 0.063" nominal thickness ensures consistent performance and fit.

Key Features & Benefits:

• Aircraft Grade (AN) Certified: Manufactured and inspected to rigorous Aeronautical Standard AN960 specifications, ensuring uncompromised quality and performance.

   

• High-Quality Material: Made from durable carbon steel for strength and longevity.

   

• Corrosion Resistant: Features a cadmium plated finish (QQ-P-416, Type II, Class 3) to protect against rust and corrosion in harsh conditions.

   

• Precision Dimensions: Designed for a 5/16" nominal bolt diameter with an approximate 0.328" ID and 0.562" OD, ensuring a precise fit.

   

• Standard Thickness: A nominal 0.063" thickness (or 1/16") provides consistent spacing and load distribution.

   

• Versatile Applications: Ideal for aircraft structures, engines, control systems, and critical assemblies in motorsport, marine, and heavy equipment.

• Supersedes NAS1149F0563P: Often cross-referenced or superseded by the NAS1149F0563P.

• NSN: 5310-00-167-0820 (for military and government procurement)

When every component must perform flawlessly, trust the AN960-516 flat washer to provide the foundational support your assemblies need.

Technical Specifications:

• Part Number: AN960-516

• Type: Flat Washer

• Material: Carbon Steel

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

   

• For Bolt Diameter: 5/16"

• Inner Diameter (ID): 0.318" - 0.338" (Nominal 0.328")

   

• Outer Diameter (OD): 0.557" - 0.582" (Nominal 0.562")

   

• Thickness: 0.053" - 0.073" (Nominal 0.063")

• Superseding Part Number: NAS1149F0563P

• NSN: 5310-00-167-0820