41 05 504 Repair Solution For Straight Shank/Hexagon Rivet Nut

Protection measures!

Wear protective goggles
Wear protective gloves

IMPORTANT: To prevent the material from tapering, do not drill out the rivet head.

Carefully spot-drill rivet head with a larger drill bit/countersink
IMPORTANT: Avoid paintwork damage

Fig 1: Spot-Drilling Rivet Head
Courtesy of BMW OF NORTH AMERICA, INC.
Knock rivet head away with a chisel

Fig 2: Removing Rivet Head With Chisel
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Drive through rivet shank into cavity, remove if necessary

Fig 3: Driving Through Rivet Shank Into Cavity
Courtesy of BMW OF NORTH AMERICA, INC.
Clean component, eliminate paintwork damage if necessary

Fig 4: Newly Drilled Hole In Component
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If the rivet shank can be removed:

IMPORTANT: To avoid corrosion, stop chips/swarf by means of cavity sealing.
Follow instructions on corrosion protection.
1. Preserving cavity
  
  Fig 5: Sealing Cavity
  Courtesy of BMW OF NORTH AMERICA, INC.
  
  If the rivet shank cannot be removed:
  
  WARNING: Risk of injury!
  Observe Notes On Cavity Foam.
  
  IMPORTANT: To avoid corrosion and rattling noises, stop chips/swarf and rivet nut shank with cavity foam.
  Remove foam remnants with isohexane (cleaning-grade petroleum spirit).
2. Stop rivet shank by means of specific foaming
  NOTE: Fit rivet nut as quickly as possibly, ideally before the cavity foam hardens.
  
  Fig 6: Sealing Cavity
  Courtesy of BMW OF NORTH AMERICA, INC.
Hexagon rivet nut (up to M8 thread), straight shank rivet nut:

IMPORTANT: Follow manufacturer's operating instructions.
Make sure rivet nut correctly contacts component.
1. Set rivet nut with hand rivet gun
  NOTE: According to the manufacturer, the pictured tool is suitable up to an M8 thread
  
  Fig 7: Hand Rivet Gun And Component
  Courtesy of BMW OF NORTH AMERICA, INC.
  
  Hexagon rivet nut (from M10 thread):
  
  IMPORTANT: Follow manufacturer's operating instructions.
  Make sure hexagon rivet nut correctly contacts component.
2. Insert screw (tensile strength min. 10.9) with body washer into hexagon rivet nut
Insert hexagon rivet nut into pre-punched hexagon hole and install by turning screw

Notes on installation:

Rivet nut is upset (screw very difficult to move).
Rivet nut is contracted (screw comparatively easy to move).
Rivet nut is pressed onto the component (screw slowly becomes difficult to move). Procedure is finished with the fitting of the relevant component and its tightening torque

Fig 8: Hexagon Rivet Nut And Component

Courtesy of BMW OF NORTH AMERICA, INC.