Corrosion resistance
Rust-resistant stainless steel
SAVE
$5.01
$5.01
Why Choose This Kit
Key features and intended use for this kit.
Verified material
A2-70/A4-80 Stainless Steel
Designed use
Model-specific maintenance & rebuilds
Stainless Screw Kit320+ Pieces
RCScrewZ Stainless Steel Screw Kit los120 for Losi Lasernut U4 2.2 RTR Brushless 1/10 Electric 4WD Rock Racer Desert Buggy (LOS03028) | SET
Model-specific stainless hardware for maintaining, repairing, and rebuilding this RC vehicle.
Fits: Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028)
OEM / model: LOS03028
US
- Regular price
- $38.94
- Sale price
- $38.94
- Regular price
-
$43.95
In stock
Confirm this kit fits your RCMatch the RC model and OEM/model number shown above to your vehicle.
Confirm This Fits Your RC
Match the RC model and OEM/model number below before ordering.
- RC model
- Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028)
- OEM / model number
- LOS03028
- Kit type
- Stainless Steel Screw Kit
- Piece count
- 320+ Pieces
- Scale
- 1:10
- Power
- Electric
More compatibility details
- RC brand
- Losi
- Vehicle class
- Land
- Kit SKU
- los120
- Model series
- Lasernut, Lasernut U4, Tenacity, U4 Rock Racer
Product information
Everything You Need Before Ordering
Review what is included, installation notes, shipping details, and complete kit information.
Kit Contents & Installation
What’s IncludedReview the product-specific hardware and confirmed kit contents.
- Socket Screws (with extras)
- Button Screws (with extras)
- Flat Head Screws (with extras)
- Set Screws (with extras)
- Nuts (with extras)
- Washers (with extras)
- Bondhus Short Arm Hex Wrenches (all sizes for your kit)
- Plastic Pit Case (durable, reusable, and designed to organize and store the included hardware)
Hardware Coverage NotesCheck the product-specific hardware coverage before ordering.
- Confirm any barrel, shoulder, or collared screw requirements against the listed kit contents.
- Confirm any screw-pin or threaded-pin requirements against the listed kit contents.
- Check separately whether required E-clips or body clips are listed.
- Check separately whether required turnbuckles or hinge pins are listed.
- Do not assume that every original fastener or coarse-thread location is covered. Compare the stated kit coverage and the original hardware before installation.
Installation & Model NotesImportant instructions and model-specific guidance.
Start threads by hand and seat screws fully to help prevent cross-threading.
Use blue threadlocker only on metal-to-metal threads; do not apply threadlocker to plastic.
After the first runs, inspect the hardware and retorque lightly as needed.
Details & Support
Kit Details Material, model-specific coverage, corrosion protection, and intended use.
- Material
- Kit Coverage
- Model-specific stainless fasteners for maintenance, repairs, and rebuilds
- Corrosion Protection
- Designed Use
- Model-specific maintenance & rebuilds
Shipping & Returns Handling time, current delivery estimate, and return policy.
Free shipping on all U.S. orders (USPS Priority Mail).
Ships within 1–2 business days (Mon–Fri); some Saturday shipments by 12:00 PM ET.
Most orders ship from Canton, MI 48187. APO/FPO/DPO & PO Boxes welcome.
Priority Mail typically delivers in 2–3 business days (estimates; not guaranteed).
Easy 30-day returns with prepaid USPS label; refunds issued within 3 business days after the return is received.
Over 99% positive over ~14,000 orders on eBay (last 12 months) — as of October 2025. View on eBay
Full Product Description Read the complete product specifications and details.
Exact RC Model Fitment
Compatible RC Model:
Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028)
Compatible RC Brand:
Losi
RC Vehicle OEM / Model Number(s):
LOS03028
RCScrewZ Kit Part Number:
los120
Vehicle Compatibility Details
- RC Vehicle OEM / Model Number(s)
- LOS03028
- RC Chassis Compatibility
- Losi Lasernut U4 Tenacity 4WD Rock Racer
- Compatible Vehicle Type
- 1/10 Electric 4WD Rock Racer Desert Buggy
- Terrain Compatibility
- Off-Road: Rock, Desert, Dirt & Gravel
- Compatible Scale
- 1:10
- Compatible Fuel Type
- Electric
What Is Included
This model-specific stainless screw kit includes hardware for the verified RC chassis. Exact sizes, quantities, and screw styles vary by model.
- Socket-head screws, with extras where applicable
- Button-head screws, with extras where applicable
- Flat-head or countersunk screws, with extras where applicable
- Set screws, with extras where applicable
- Matching nuts and washers, with extras where applicable
- Bondhus short-arm hex wrenches for applicable kit sizes
- Reusable plastic pit case for organized storage
Important:
The exact hardware mix is determined by the verified chassis configuration. Not every kit requires every screw style listed above.
What Is Not Included
This kit does not include items that require a different fitment, material, or hardware design:
- Barrel screws
- Shoulder or collared screws
- Screw pins or threaded pins
- E-clips or body clips
- Turnbuckles or hinge pins
- Wood, plastic, or coarse-thread screws
Installation & Model Notes
Stainless Steel Screw Kit Compatibility:
Quick Fit Summary:
Compatible Brand: Losi
Fit: Model-specific fitment for Losi Lasernut U4 2.2 RTR Brushless
Compatible RC Model/OEM Numbers: LOS03028
Scale: 1/10
Power Source / Fuel Type: Electric
Battery / Cell Count: 4S
Drive Type: 4WD
Vehicle Type: Rock Racer / Desert Buggy
Chassis: Losi Lasernut U4 Tenacity 4WD Rock Racer
Era: Next Gen Era (2020–Present)
OEM / Models: LOS03028
RC Model Terrain: Off-Road: Rock, Desert, Dirt & Gravel
This Kit Details:
SKU: los120
MPN: los120
Kit Type: Stainless Steel Screw Kit
Screw Kit Piece Count: 320+ Pieces
Product Material: A2-70/A4-80 stainless steel hardware
Product Color: Silver
OEM / Model Code / Alias Coverage:
Verified OEM / model codes: LOS03028
Series / search aliases: Lasernut, Lasernut U4, Tenacity, U4 Rock Racer
Model Family Coverage:
Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028)
Product Benefits:
A2-70/A4-80 stainless steel hardware helps resist corrosion and gives RC builders a clean, durable, model-specific refresh for rebuilds, race prep, restoration, and long-term maintenance.
Fitment Note:
Confirm your RC model and OEM number before ordering. This kit is matched to Losi Lasernut U4 2.2 RTR Brushless and the listed OEM/model codes.
Search-Friendly Notes:
Compatible Losi and TLR parts support for Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028); useful for RC screw kit, RC bearing kit, rebuild, upgrade, race prep, and maintenance searches.
Stainless Screw Kit Details
- RCScrewZ Kit Part Number
- los120
- Product Brand
- RCScrewZ
- Screw Type
- Metric Stainless Steel Screws
- Screw Material
- A2-70/A4-80 Stainless Steel
- Approximate Piece Count
- 320+ Pieces
- Color
- Silver
- Country/Region of Manufacture
- United States
Before Ordering
Confirm your exact RC model, chassis configuration, and vehicle OEM/model number where applicable before ordering.
Do not assume fitment for custom conversions, mixed-chassis builds, modified vehicles, or unverified model variations.
Contact J-M SUPPLIES RC Parts Store before ordering when your vehicle does not match the compatibility details shown above.
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Customer Reviews
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Fits: Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028)
$38.94