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Clear Chromate 6061 Aluminum Chamber Floor Plates

A two-piece 6061-T651 aluminum machining project featuring circular sealing geometry, threaded features, clear chromate, post-finish inserts, controlled surface finishes, and standard inspection.
October 22, 2026 by
Clear Chromate 6061 Aluminum Chamber Floor Plates

Project Overview

This two-piece, low-volume project involved CNC machining 6061-T651 aluminum chamber floor plates with large circular recessed and sealing features, precision hole patterns, threaded features, and post-finish inserts. The parts received a clear chromate conversion coating and completed standard inspection before shipping ahead of the requested date.

Project Snapshot

  • Industry: Advanced Technology
  • Work type: Low-volume precision machining
  • Material: 6061-T651 aluminum
  • Quantity: 2 pieces
  • Processes: Multi-operation CNC milling, drilling, threading, clear chromate, threaded insert installation, inspection
  • Finish: Clear chromate per MIL-DTL-5541 Type II, Class 3
  • Surface finish: 32 Ra on general surfaces with a 15 Ra sealing surface requirement
  • Inspection: Standard inspection covering surface finish and threaded features
  • Total turnaround: 14 days

Capabilities Demonstrated

  • Low-volume CNC machining from 6061 aluminum plate
  • Large circular recessed features and sealing geometry
  • Precision hole patterns and threaded features
  • Controlled surface-finish requirements
  • Clear chromate finishing coordination
  • Post-finish threaded insert installation
  • Final dimensional, thread, and surface-finish inspection

Manufacturing Approach

The plates were produced through multiple CNC milling operations to establish the exterior profile, circular recessed geometry, precision bores, hole pattern, and threaded features. Clear chromate was applied before fourteen threaded inserts were installed in each part. Final inspection verified the specified surface finishes and threads before shipment.

Project Image

Finished component view.

Two CNC-machined 6061 aluminum chamber floor plates with circular sealing features, precision holes, and clear chromate finish

Need a Low-Volume Aluminum Component?

Send the model or drawing, material, finish, inspection requirements, quantity, and required date. Spartan Alloys can review the machining approach, finishing plan, and production schedule for prototype and low-volume aluminum components.

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