---
product_id: 570711663
title: "T Slot Bolts for Roof Rack Cross Bars, Platform, Cargo Basket, Stainless Square T Track Bolt Adapter to Secure Bike/Ski/Kayak Rack, Solar Panel, Awning, 4mm Thick"
brand: "moroinriz"
price: "¥5112"
currency: JPY
in_stock: true
reviews_count: 13
category: "Moroinriz"
url: https://www.desertcart.jp/products/570711663-t-slot-bolts-for-roof-rack-cross-bars-platform-cargo
store_origin: JP
region: Japan
---

# 20x20x4mm square base, fits most T-track rails 304 stainless steel, rust & corrosion resistant M6/M8 threading, multiple bolt lengths T Slot Bolts for Roof Rack Cross Bars, Platform, Cargo Basket, Stainless Square T Track Bolt Adapter to Secure Bike/Ski/Kayak Rack, Solar Panel, Awning, 4mm Thick

**Brand:** moroinriz
**Price:** ¥5112
**Availability:** ✅ In Stock

## Summary

> 🔧 Lock it down, level up your adventure gear!

## Quick Answers

- **What is this?** T Slot Bolts for Roof Rack Cross Bars, Platform, Cargo Basket, Stainless Square T Track Bolt Adapter to Secure Bike/Ski/Kayak Rack, Solar Panel, Awning, 4mm Thick by moroinriz
- **How much does it cost?** ¥5112 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/570711663-t-slot-bolts-for-roof-rack-cross-bars-platform-cargo)

## Best For

- moroinriz enthusiasts

## Why This Product

- Trusted moroinriz brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless Installation:** Lock nuts and washers included for a clean, scratch-free, and professional finish.
- • **Marine-Grade Durability:** 304 stainless steel resists rust and corrosion, perfect for all-weather adventures.
- • **Versatile Mounting Power:** Ideal for bike racks, ski carriers, solar panels, awnings, and more—upgrade your rooftop setup.
- • **Precision Fit & Secure Hold:** Square 20mm base with M6/M8 threads ensures rock-solid mounting for your gear.
- • **Universal T-Track Compatibility:** Seamlessly slides into most roof rack T-slots—no drilling, no hassle.

## Overview

These T Slot Bolts are precision-engineered 304 stainless steel adapters designed to securely fasten bike racks, ski carriers, solar panels, and other rooftop accessories to most T-track roof rack crossbars. Featuring a 20x20x4mm square base and M6/M8 threading, they offer rust-resistant, marine-grade durability and easy slide-in installation without drilling, making them the ultimate upgrade for outdoor enthusiasts seeking reliable, versatile mounting hardware.

## Description

CompatibilityPerfect for roof rack with railsFor Whispbar Rail BarFor Whispbar Flush BarFor Whispbar Through Bar (Not Fit for Whispbar HD Bar)For Yakima Jetstream with T slots (Not fit for Yakima CoreBar without T slots)Some roof rack / luggage rack and cargo basket304 Stainless SteelMade of heavy duty 304 stainless steel, it features rust resistant and corrosion resistant in salt water, perfect t-track accessories for camping, touring, travel, and other outdoor activitiesHeavy Duty Rooftop Mounting Hardware Kit for Easy MountingPerfect roof rack replacement parts for your roof bars, just need to slide it into roof bar, simpler to use compared with t track clampsWide ApplicationUtility t-track bolts with matching nuts washer barrel kit for most roof rack systems, roof basket, allow you to attach bike carrier racks, kayak rack, bike carriers, ski holders, snowboard roof rack, side awning, canopy, surfboard roof rack to your roof rack bars with easeSpecItem Name: T Bolts for T TrackMaterial: 304 Stainless SteelThread Size: M6 x 1 (1/4-20), M8 x 1.25 (5/16-18) (Optional)Bolt Length: 30mm, 35mm (Optional)Square Head Base: 0.79 in x 0.79 in x 0.16 in (20mm x 20mm x 4mm)Washer: 0.04 in x 0.47 in (1mm x 12mm)Nut: 0.39 in x 0.2 in (10mm x 5mm)Fit Vehicle: SUV, ATV, UTV, RV, VANMounting Type: Roof Rack Mounting, Cross Bar Mounting, Roof Top Mounting

Review: Solid T track bolts for most/all T rail systems - Fit great in a standard truck bed rack rail system. I tried them in the bed rack system and in my roof top tent system and they work well - apparently the "T" bolt system is universal and should work for any "T" rail system attachment you have. Should. The hardware is not Grade 8, but it's sturdy and I was able to get good grip and tightening on it with no movement using the lock washers.
Review: Great product, used in Retrax T slots. - These are well made and stainless steel, checked with magnet, black color also, worked well, I would buy again.

## Features

- Versatile t Track Bolts - this t-track adapter accessory kit is a great solution to attach items firmly to your t track crossbar, compatible with t slot, perfect t-track adapter accessory kit to attach bike rack / ski rack / kayak rack, roof rack awning, solar panel, fishing rod holder, cargo box to roof rack cross bars, roof rack cargo basket, car rooftop platform or side rails, works well with most solar panel mounting brackets
- Technical Specification - the t bolt is made of 304 solid stainless steel, 79 in x 0.79 in x 0.16 in (20mm x 20mm x 4mm) square head base, m6 / m8 threading, 30mm / 35mm / 65mm length
- Easy to Set Up - no drilling, cleaner look, just need to slide it into the t slot of your roof bar, and won't scratch your cross bar, great alternative to roof rack t track clamp*NOTE-please check the dimension of your cross bar rail, this t bolts base is 20mm x 20mm x 4mm (L x W x Thickness)*
- Marine Resistant - stamping t slot accessories, more durable compared with welding parts, made of solid 304 stainless steel, it features rust resistant and corrosion resistant even in salt water, designed for most harsh environment, perfect t track accessories for suv / rv roof top
- What You Will Receive - roof rack mounting hardware kit, include t-bolt with lock nuts and washer, satisfying purchasing experience of your customer is our priority, please feel free to contact us if you have other questions! Thanks for your supporting!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CGB1R63J |
| Best Sellers Rank | #10,439 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #2 in Bike Car Rack Accessories |
| Brand | moroinriz |
| Color | M8x30mm,6pk |
| Date First Available | August 22, 2023 |
| Exterior Finish | Stainless Steel |
| Fastener Type | T-Bolt |
| Head Style | Square |
| Head Type | Square |
| Item Diameter | 8 Millimeters |
| Item Hardness | Grade 5 |
| Item Weight | 8.4 ounces |
| Item model number | QM-BOL-15 |
| Manufacturer | moroinriz |
| Manufacturer Grade | Grade 304 |
| Material | Stainless Steel |
| Number of Pieces | 6 |
| Size | M8 |
| Thread Class | 3B |
| Thread Size | M8 |
| Thread Style | Right Hand |
| Thread Type | Metric |

## Product Details

- **Exterior Finish:** Stainless Steel
- **Head Style:** Square
- **Manufacturer Grade:** Grade 304
- **Material:** Stainless Steel
- **Thread Size:** M8

## Images

![T Slot Bolts for Roof Rack Cross Bars, Platform, Cargo Basket, Stainless Square T Track Bolt Adapter to Secure Bike/Ski/Kayak Rack, Solar Panel, Awning, 4mm Thick - Image 1](https://m.media-amazon.com/images/I/71j8Sj58yzL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Solid T track bolts for most/all T rail systems
*by O***L on June 10, 2025*

Fit great in a standard truck bed rack rail system. I tried them in the bed rack system and in my roof top tent system and they work well - apparently the "T" bolt system is universal and should work for any "T" rail system attachment you have. Should. The hardware is not Grade 8, but it's sturdy and I was able to get good grip and tightening on it with no movement using the lock washers.

### ⭐⭐⭐⭐⭐ Great product, used in Retrax T slots.
*by A***R on September 15, 2025*

These are well made and stainless steel, checked with magnet, black color also, worked well, I would buy again.

### ⭐⭐⭐⭐⭐ Awesome hardware
*by M***E on September 3, 2025*

Works great, used to secure a Thule ski box. I also purchased thumb screws so I don’t have to use a wrench to tighten hardware.

## Frequently Bought Together

- T Slot Bolts for Thule, Yakima Roof Rack Cross Bars, Platform, Cargo Basket, Stainless Square T Track Bolt Adapter to Secure Bike/Ski/Kayak Rack, Solar Panel, Awning, 4mm Thick
- T Track Mount Tie Down Anchor for Roof Rack, M8 Heavy Duty Ring Shaped Eye Bolt, Stainless Steel T Bolt Eye Nut Tie Down Rings for Holding Bungee Cord, Ropes, Hooks
- moroinriz T Slot Bolts for Thule, Yakima Roof Rack Cross Bars, Platform, Cargo Basket, Stainless Square T Track Bolt Adapter to Secure Bike/Ski/Kayak Rack, Solar Panel, Awning

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-09*