411 WORKS 1" Steel Cups with Aluminum Bungs

The 411 WORKS 1" Steel Cups with Aluminum Bungs are precision-machined fabrication components designed for custom automotive, motorsport, and general fabrication projects. The cups are manufactured from 1018 steel, while the matching bungs are machined from 6061 aluminum, providing builders with two purpose-specific materials in one mounting solution. Manufactured in-house in the USA on HAAS CNC machines using North American materials, the cups are available in Deep, Shallow, and Scallop configurations. The aluminum bungs are available with four different thread options, allowing the assembly to be configured around the requirements of your fabrication project. 1018 Steel Cups: Cups are machined from high-quality North American 1018 steel for a durable and weldable fabrication component. 6061 Aluminum Bungs: Matching bungs are CNC machined from North American 6061 aluminum. Three Cup Configurations: Choose from Deep, Shallow, or Scallop cup designs depending on your mounting and fabrication requirements. Four Bung Thread Options: Aluminum bungs are available with M6x1.0, M8x1.25, 1/4-20, or 5/16-18 threads. 0.90-Inch Actual Diameter: Both the 1" cups and bungs measure an actual 0.90" in diameter for consistent fabrication planning. CNC-Machined Construction: Precision machined in-house using HAAS CNC equipment for consistent dimensions and quality. Made in the USA: Manufactured in-house by 411 WORKS using 1018 steel and 6061 aluminum sourced from North America. Available Cup Options Deep Shallow Scallop Available Bung Thread Options M6x1.0 M8x1.25 1/4-20 5/16-18 What's Included (1) 411 WORKS 1" 1018 Steel Cup in selected configuration (1) 411 WORKS 1" 6061 Aluminum Bung in selected thread configuration Vehicle Fitment Universal fabrication application Suitable for custom automotive and motorsport fabrication Final compatibility depends on the mounting location, dimensions, thread requirements, and intended application Specifications Brand: 411 WORKS Product Type: Fabrication Cup and Bung Cup Material: 1018 Steel Bung Material: 6061 Aluminum Cup Diameter: 0.90" Bung Diameter: 0.90" Cup Options: Deep / Shallow / Scallop Bung Thread Options: M6x1.0 / M8x1.25 / 1/4-20 / 5/16-18 Manufacturing Process: CNC Machined CNC Equipment: HAAS Material Origin: North America Manufacturing Location: USA Fitment: Universal Spec Drawings M6 Deep Cup Spec Drawing M8 Deep Cup Spec Drawing M6 Shallow Cup Spec Drawing M8 Shallow Cup Spec Drawing Bung Spec Drawing Important Notes This product includes one steel cup and one aluminum bung in the selected configurations. This is a universal fabrication product and is not vehicle specific. Select Deep, Shallow, or Scallop for the cup configuration. Select M6x1.0, M8x1.25, 1/4-20, or 5/16-18 for the aluminum bung thread. Both the 1" cup and bung have an actual outside diameter of 0.90". Specification drawings are provided for the Deep and Shallow cup configurations and the bung. Verify all dimensions, thread requirements, mounting location, hardware, and clearance before beginning fabrication. The cup and bung are manufactured from different materials. Use fabrication and joining methods appropriate for 1018 steel and 6061 aluminum. Professional fabrication is recommended for structural, suspension, steering, or other safety-critical applications. Why Choose 411 WORKS? 411 WORKS manufactures its fabrication components in-house using HAAS CNC equipment with an emphasis on precision, quality, and reliability. This combination pairs a 1018 steel cup with a 6061 aluminum bung while providing multiple configurations to suit different custom mounting requirements. With three cup styles and four bung thread options, the 411 WORKS 1" Steel Cups with Aluminum Bungs provide a versatile solution for custom automotive and motorsport fabrication.