assembly: "steering_fasteners"
description: "Steering assembly fasteners and hardware"
parent: "steering"
components:
  - id: "coupling_motor_bolts"
    part_number: "M6x20-HEX"
    description: "Coupling to motor bolts"
    category: "fasteners"
    quantity: 4
    unit_cost: 0.35
    currency: "EUR"
    status: "active"
    criticality: "essential"
    suppliers:
      - name: "McMaster-Carr"
        verified: true
      - name: "Fastenal"
        verified: true
    specifications:
      size: "M6 x 20mm"
      type: "hex head cap screw"
      material: "steel_zinc_plated"
      torque_spec: "12 Nm"
      thread_pitch: "1.0mm"
    installation:
      sequence: 3
      threadlocker: "blue_loctite_243"
      torque_pattern: "cross"
    maintenance:
      check_frequency: "weekly"
      torque_check: "monthly"
    notes: "Secures motor to coupling - Item #1 in assembly photo"

  - id: "main_coupling_bolt"
    part_number: "M8x25-HEX"
    description: "Main coupling bolt"
    category: "fasteners"
    quantity: 1
    unit_cost: 0.45
    currency: "EUR"
    status: "active"
    criticality: "critical"
    suppliers:
      - name: "McMaster-Carr"
        verified: true
      - name: "Auto parts stores"
        notes: "Grade 8.8 bolts available locally"
    specifications:
      size: "M8 x 25mm"
      type: "hex head cap screw"
      material: "steel_grade_8.8"
      torque_spec: "20 Nm"
      thread_pitch: "1.25mm"
    installation:
      sequence: 4
      threadlocker: "blue_loctite_243"
      critical: true
    maintenance:
      check_frequency: "bi-weekly"
      torque_check: "bi-weekly"
    notes: "Main coupling bolt through steering shaft - Item #2 in assembly photo. CRITICAL: Failure disables steering"

  - id: "sensor_mount_screws"
    part_number: "M3x8-HEX"
    description: "Sensor mounting screws"
    category: "fasteners"
    quantity: 2
    unit_cost: 0.20
    currency: "EUR"
    status: "active"
    criticality: "essential"
    suppliers:
      - name: "McMaster-Carr"
        verified: true
      - name: "Electronics suppliers"
        notes: "Common with sensor breakout boards"
    specifications:
      size: "M3 x 8mm"
      type: "hex head cap screw"
      material: "steel_zinc_plated"
      torque_spec: "3 Nm"
      thread_pitch: "0.5mm"
    installation:
      sequence: 1
      threadlocker: "none"
      technique: "hand_tighten_plus_quarter_turn"
    maintenance:
      check_frequency: "monthly"
      torque_check: "quarterly"
    notes: "AS5600 sensor board mount - Item #3 in assembly photo. CAUTION: Do not over-torque"

  - id: "motor_bracket_bolts"
    part_number: "M6x30-HEX"
    description: "Motor bracket bolts"
    category: "fasteners"
    quantity: 2
    unit_cost: 0.40
    currency: "EUR"
    status: "active"
    criticality: "essential"
    suppliers:
      - name: "McMaster-Carr"
        verified: true
      - name: "Fastenal"
        verified: true
    specifications:
      size: "M6 x 30mm"
      type: "hex head cap screw"
      material: "steel_zinc_plated"
      torque_spec: "15 Nm"
      thread_pitch: "1.0mm"
    installation:
      sequence: 2
      threadlocker: "blue_loctite_243"
      alignment_critical: true
    maintenance:
      check_frequency: "weekly"
      torque_check: "monthly"
      inspection_notes: "Check for vibration loosening"
    notes: "Steering motor to chassis bracket"

assembly_info:
  total_cost: 5.50
  spare_parts_recommendation: "25% extra quantity"
  tools_required:
    - "Hex key set: 3mm, 6mm, 8mm"
    - "Torque wrench: 0-25 Nm range"
    - "Loctite 243 threadlocker"
  installation_sequence:
    1: "Install AS5600 sensor with M3x8 screws"
    2: "Mount motor to chassis with M6x30 bracket bolts"
    3: "Connect motor to shaft coupling with M6x20 bolts"
    4: "Install main coupling bolt M8x25 (CRITICAL)"
    5: "Test smooth operation and sensor readings"
  safety_notes:
    - "All steering fasteners are safety-critical"
    - "Use specified torque values"
    - "Inspect regularly for looseness"
    - "Main coupling bolt failure disables steering completely"