Model Collection: This page confirms fitment for one specific Kyosho RC model and lists the compatible Stainless Screw Kit and Bearing Kit options. Not sure what model you have? Use the Compatibility Hub or read the Compatibility Guide.
Kyosho Caliber 5 1/10 RC Helicopter Nitro (#21250) — Compatible Kits by RCScrewZ (Screws & Bearings)
New here? Why buy model-specific kits (not assortments)
Available Parts for this RC Model
- Stainless Steel Screw Kit
- Metal-Shielded Bearing Kit
Note: Rubber-shielded bearings are typically not offered for aerial RC models.
RC Model Specs
- RC Model: Kyosho Caliber 5 1/10 RC Helicopter Nitro (#21250)
- Compatible Brand: Kyosho
- Scale: 1:10
- Fuel Type: Nitro & Glow Fuel
- Vehicle Type: RC Helicopter
- Production Era: Modern Transition (2000-2009)
- OEM / Model Codes: 21250
RC Model Specific &
Compatible Kit Details
Stainless Steel Screw Kit
A2-70/A4-80 — Hex screws: Button Head, Socket Cap, Flat/Countersunk, Set Screws
- SKU: kyo064
- MPN: kyo064
- Color: Silver
- Material: A2-70/A4-80 Stainless Steel
- Screw Grade: A2-70/A4-80
- Coverage: Model-specific fasteners; replaces coarse screws
- 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 great for storage)
- Pieces in Kit: Piece count coming soon. Contact us for immediate details.
- Head Types: Hex screws: Button Head, Socket Cap, Flat/Countersunk, Set Screws
- Corrosion Protection: Rust-resistant stainless steel
- Maintenance: Re-check after first runs; retorque lightly
- Use case: Full RC Rebuild / Upgrade
- Install tips: Seat fully; avoid cross-thread
- Install tips: Blue threadlocker on metal-to-metal
- Ships from the USA
- Fast shipping with tracking
- Easy 30-day returns
- Earn rewards on every order
- Bundle and save with a Bearing Kit
- SKU: kyo064b
- MPN: kyo064b
- Color: Silver
- Type: Metal-Shielded (On-Road)
- Material: Carbon Chrome Steel
- Included Bearings:
- 3mm x 7mm x 3mm bearings +(1) extra
- 5mm x 10mm x 4mm bearings +(1) extra
- 6mm x 10mm x 3mm bearings +(1) extra
- 6mm x 12mm x 4.5mm thrust bearings
- 6mm x 13mm x 5mm bearings +(1) extra
- 8mm x 16mm x 5mm bearings +(1) extra
- 10mm x 19mm x 5mm bearings +(1) extra
- RC Bearing Sizes: All Bearings Are Included + (1) Extra of Every Size for Spares
- Pieces in Kit: 45+ Pieces
- Sealed Bearings: No
- Protection: Low-drag, not sealed
- Maintenance: Low-drag shields; keep dry; add light oil after cleaning.
- Use case: Race prep
- Bundle: Pair with Stainless Screw Kit for complete refresh.
- Install tips: Seat fully; Do not over-tighten
- Install tips: After cleaning: add light oil
All-Inclusive kits feature Standard, Flanged, One-Way, and Thrust bearings (as applicable).
View Cart & Checkout- Ships from the USA
- Fast shipping with tracking
- Easy 30-day returns
- Earn rewards on every order
- Bundle and save with a Stainless Screw Kit
Compatible Products — Add to Cart Below
More Kyosho Models:
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FAQs for Kyosho Caliber 5 1/10 RC Helicopter Nitro (#21250) — Compatible Kits by RCScrewZ (Screws & Bearings)
How do I know these kits fit my Kyosho Caliber 5 1/10 RC Helicopter Nitro (#21250)?
Each kit on this page is made specifically for the Kyosho Caliber 5 1/10 RC Helicopter Nitro (#21250). We cross-check scale, layout and hardware locations against the factory manual so you get the right stainless screws and bearings for this exact RC heli—no measuring or guessing.
What's included in the stainless screw kit for Kyosho Caliber 5 1/10 RC Helicopter Nitro (#21250)?
Every RCScrewZ stainless steel screw kit for Kyosho Caliber 5 1/10 RC Helicopter Nitro (#21250) includes a model-specific mix of socket head, button head, flat head and set screws, plus matching nuts and washers—with extras of the most commonly used sizes. Each kit also comes with Bondhus short arm hex wrenches in the sizes used on your heli and a durable plastic pit case you can reuse for storage and organizing hardware. Exact counts and sizes vary by model. The kit does not include electronics, servos, motors or engines, blades or airframe parts.
Which bearings are best for my Kyosho Caliber 5 1/10 RC Helicopter Nitro (#21250)?
For Kyosho Caliber 5 1/10 RC Helicopter Nitro (#21250) builds, RCScrewZ kits use precision metal-shielded bearings. Helis are typically flown in cleaner environments, so low-drag metal shields give smooth rotation and consistent head speed without the extra friction of rubber seals. We recommend keeping the model away from heavy dust and moisture and cleaning bearings as part of your regular maintenance.
How does RC Pro Club help with Kyosho Caliber 5 1/10 RC Helicopter Nitro (#21250) upgrades?
RC Pro Club is our rewards program for RC builders. Every order for your Kyosho Caliber 5 1/10 RC Helicopter Nitro (#21250) earns points you can redeem for discounts on future screw kits and bearing kits. When you grab multiple kits for the same heli—like a stainless screw kit plus a matching metal-shielded bearing kit—you earn more points in a single order and unlock bigger savings over time.
What's included in the RCScrewZ bearing kits for Kyosho Caliber 5 1/10 RC Helicopter Nitro (#21250)?
RCScrewZ bearing kits for Kyosho Caliber 5 1/10 RC Helicopter Nitro (#21250) are built as a complete upgrade package. You get every bearing needed for key areas like the rotor head, main shaft, tail rotor and drivetrain, plus one extra of each size for quick spares. Kits can include standard and flanged bearings where your heli uses them, so you are not hunting for odd sizes or partial sets. Each kit comes in a reusable storage case that keeps bearings organized in your field box and ready for the next rebuild.
Looking for a different RC model?
Start at the RC Model Compatibility Hub to pick your brand, series/chassis, and exact model, then jump straight to compatible stainless screw kits and bearing kits.