Redcat Part 07171 Problems: Screw Fixes That Work
By Redcat Racing | Published: 2026-11-04
Category: 제품 리뷰
Losing 4x20mm button head screws on your RAMPAGE? Here is how to diagnose stripping, loosening, and thread damage on Redcat part 07171 and when to replace instead of repair.
Quick answer
Most Redcat 07171 problems come from a worn hex driver, over-tightening, or reusing a screw after its head rounds out. Start with a fresh 2.5mm hex driver and a torque check before you replace the set.
Why button head screws fail on bashers
Button head hex screws concentrate load in a shallow socket, so a worn or undersized driver rounds the corners faster than on a cap head. On RAMPAGE CHIMERA SR and RAMPAGE XT trucks, the same 4x20mm size may be used in several spots, which makes it easy to mix a stretched screw back into a high-vibration location.
The 8-piece set gives you spares, but it does not include threadlocker or washers. If a screw keeps backing out after correct torque, the hole or the mating part is usually the real issue, not the screw.
When replacement beats repair
A screw with a rounded hex socket, a bent shank, or flattened threads will not hold torque reliably. Replacing it with a fresh 07171 screw is cheaper and safer than trying to salvage it with a rubber band or a larger driver.
If the threaded hole itself is stripped, a new screw will not fix it. Stop and inspect the receiving part before buying another hardware set.
Diagnosis: symptom, cause, fix, and stop point
- Hex socket rounds out: Symptom: the driver spins inside the head. Likely cause: a worn 2.5mm hex driver or using a standard instead of metric bit. Corrective action: try a new quality 2.5mm driver with firm downward pressure. Stop point: if the socket is visibly rounded, replace the screw with a fresh 07171 piece rather than forcing it. A driver that rocks in the socket is already too worn for button heads.
- Screw keeps loosening: Symptom: the same screw backs out after a run. Likely cause: no threadlocker, a stretched screw, or a cracked mounting hole. Corrective action: clean the threads, apply a small amount of medium threadlocker, and torque gently. Stop point: if it still loosens with threadlocker, inspect the hole for cracks and replace the mating part instead of adding more screws. Repeated loosening points to the hole, not the hardware.
- Threads strip during install: Symptom: the screw spins freely before it seats. Likely cause: cross-threading or over-tightening into plastic or soft metal. Corrective action: back the screw out, clean the threads, and reinstall by hand until it seats. Stop point: if the threads are flattened or the hole is stripped, replace the screw and evaluate the receiving part before using the truck. Never chase a stripped hole with a longer screw from another set.
Product facts
- 07171: 4x20mm button head hex machine thread screws, 8 pieces per set, listed for RAMPAGE CHIMERA SR, RAMPAGE XT, and legacy RAMPAGE R5. Confirm your model is on that list before ordering, and keep the set as a direct spare for the same size and head style.
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