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Representative image of an RCScrewZ stainless steel screw kit for Kyosho Mad Force 1/8 Nitro 4WD Monster Truck (31221); exact kit contents vary by RC model.
Rustproof, Durable, Quality RCScrewZ Stainless Steel Screw Kit kyo005 for Kyosho Mad Force 1/8 Nitro GP 4WD Monster Truck (31221) | SET - Affordable Quality | Quick Ship - by J-M SUPPLIES
Socket, Button, Flat Head, Set Screws for RCScrewZ Stainless Steel Screw Kit kyo005 for Kyosho Mad Force 1/8 Nitro GP 4WD Monster Truck (31221) | RCX - by J-M SUPPLIES
Socket, Button, Flat Head, Set Screws for RCScrewZ Stainless Screw Kit kyo005 for Kyosho Mad Force Monster Truck #31221 RC Car | RCX - by J-M SUPPLIES
Socket, Button, Flat Head, Set Screws for RCScrewZ Stainless Screw Kit kyo005 for Kyosho Mad Force Monster Truck #31221 RC Car | SET - by J-M SUPPLIES
Elevate your RC adventure with Stainless Screw Kit For Kyosho - RCScrewZ | RC Car Upgrades - by J-M SUPPLIES
RCScrewZ Stainless Steel Screw Kit kyo005 for Kyosho Mad Force 1/8 Nitro GP 4WD Monster Truck (31221) | SET
RCScrewZ Stainless Steel Screw Kit kyo005 for Kyosho Mad Force 1/8 Nitro GP 4WD Monster Truck (31221) | SET
RCScrewZ Stainless Steel Screw Kit kyo005 for Kyosho Mad Force 1/8 Nitro GP 4WD Monster Truck (31221) | SET
RCScrewZ Stainless Steel Screw Kit kyo005 for Kyosho Mad Force 1/8 Nitro GP 4WD Monster Truck (31221) | SET
RCScrewZ Stainless Steel Screw Kit kyo005 for Kyosho Mad Force 1/8 Nitro GP 4WD Monster Truck (31221) | SET
RCScrewZ Stainless Steel Screw Kit kyo005 for Kyosho Mad Force 1/8 Nitro GP 4WD Monster Truck (31221) | SET
RCScrewZ Stainless Steel Screw Kit kyo005 for Kyosho Mad Force 1/8 Nitro GP 4WD Monster Truck (31221) | SET
RCScrewZ Stainless Steel Screw Kit kyo005 for Kyosho Mad Force 1/8 Nitro GP 4WD Monster Truck (31221) | SET
RCScrewZ Stainless Steel Screw Kit kyo005 for Kyosho Mad Force 1/8 Nitro GP 4WD Monster Truck (31221) | SET

Why Choose This Kit

Key features and intended use for this kit.

Corrosion resistance

Rust-resistant stainless steel

Verified material

A2-70/A4-80 Stainless Steel

Designed use

Model-specific maintenance & rebuilds

Stainless Screw Kit280+ Pieces

RCScrewZ Stainless Steel Screw Kit kyo005 for Kyosho Mad Force 1/8 Nitro GP 4WD Monster Truck (31221) | SET

(3)
RCScrewZSKU: kyo005

Model-specific stainless hardware for maintaining, repairing, and rebuilding this RC vehicle.

Fits: Kyosho Mad Force 1/8 Nitro 4WD Monster Truck (31221)
OEM / model: 31221

US
Regular price
$38.94
Sale price
$38.94
Regular price
$43.95

In stock

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Confirm this kit fits your RCMatch the RC model and OEM/model number shown above to your vehicle.

Exact model check

Confirm This Fits Your RC

Match the RC model and OEM/model number below before ordering.

RC model
Kyosho Mad Force 1/8 Nitro 4WD Monster Truck (31221)
OEM / model number
31221
Kit type
Stainless Steel Screw Kit
Piece count
280+ Pieces
Scale
1:8
Power
Nitro & Glow Fuel
View all verified kits for this model →
More compatibility details
RC brand
Kyosho
Vehicle class
Land
Kit SKU
kyo005
Model series
Mad Force
Product information

Everything You Need Before Ordering

Review what is included, installation notes, shipping details, and complete kit information.

Kit Contents & Installation

What’s IncludedSee the hardware, tools, and storage case supplied with this kit.
  • 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)
What’s Not IncludedReview which specialized hardware types are not included with this kit.
  • Barrel, shoulder, or collared screws
  • Screw pins or threaded pins
  • E-clips or body clips
  • Turnbuckles or hinge pins
  • Original-style wood, plastic, or coarse-thread screws are not included. Where your RC model uses a coarse-thread screw, this kit supplies a compatible machine-thread stainless steel replacement for that location.
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
A2-70/A4-80 Stainless Steel
Kit Coverage
Model-specific stainless fasteners for maintenance, repairs, and rebuilds
Corrosion Protection
Rust-resistant stainless steel
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:
Kyosho Mad Force 1/8 Nitro 4WD Monster Truck (31221)

Compatible RC Brand:
Kyosho

RC Vehicle OEM / Model Number(s):
31221

RCScrewZ Kit Part Number:
kyo005

Vehicle Compatibility Details

RC Vehicle OEM / Model Number(s)
31221
RC Chassis Compatibility
Kyosho Mad Force ladder-frame chassis (31221)
Compatible Vehicle Type
1/8 Nitro GP 4WD Monster Truck
Terrain Compatibility
Off-Road: Dirt, Grass & Rough Terrain
Compatible Scale
1:8
Compatible Fuel Type
Nitro & Glow Fuel

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: Kyosho

  • Fit: Model-specific fitment for Kyosho Mad Force.

  • Compatible RC Model/OEM Numbers: Kyosho Mad Force (31221)

  • Scale: 1/8

  • Power Source / Fuel Type: Nitro GP

  • Battery / Cell Count: Not applicable - nitro engine powered.

  • Drive Type: 4WD

  • Vehicle Type: Monster Truck

  • Chassis: Kyosho Mad Force ladder-frame chassis (31221)

  • Era: Modern Transition (2000-2009)

  • OEM / Models: 31221

  • RC Model Terrain: Off-Road: Dirt, Grass & Rough Terrain

  • Release Date: 2002 Release

This Kit Details:

  • SKU: kyo005

  • MPN: kyo005

  • Kit Type: Stainless Steel Screw Kit

  • Screw Kit Piece Count: 280+ Pieces

  • Product Material: A2-70/A4-80 stainless steel hardware

  • Product Color: Silver

OEM / Model Code / Alias Coverage:

Verified OEM/model code coverage for this listing: 31221.

Model Family Coverage:

Mad Force.

Product Benefits:

  • A2-70/A4-80 stainless hardware helps resist corrosion and improves long-term service durability.

  • Model-specific kit selected for Kyosho fitment instead of a generic screw assortment.

  • Useful for rebuilds, restoration, and maintenance of vintage or classic Kyosho platforms.

Fitment Note:

Check your Kyosho model number before ordering. This kit is configured for Kyosho Mad Force (31221) and should not be assumed to fit other Kyosho variants unless separately listed.

Search-Friendly Notes:

Kyosho Mad Force, Mad Force, 31221, 1/8 Nitro GP 4WD Monster Truck.

Stainless Screw Kit Details

RCScrewZ Kit Part Number
kyo005
Product Brand
RCScrewZ
Screw Type
Metric Stainless Steel Screws
Screw Material
A2-70/A4-80 Stainless Steel
Approximate Piece Count
280+ 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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Fits: Kyosho Mad Force 1/8 Nitro 4WD Monster Truck (31221)
$38.94