What size are rhe bullet connectors? 2 mm???

Dear,it's 3.5mm bullet connectors.

what size mounting screws do you use to mount these motors to the frame arms?

M39 M3 Hexagonal Hex Screws 9mm

What size Nuts do these motors use to hold on the props?

Dear,the size of Nuts to hold on props was M6 size.

None of the props I've tried work with this without modification. 1045 is a good size but the axle has flats and is ~8mm in diameter. Are there any?

You can have a try 1045 Self-Tightening Propellers: https://www.amazon.com/RAYCorp-Self-Tightening-10x4-5-Propellers-Pieces/dp/B07H1HXCGJ/ref=sr_1_12?keywords=1045+props&qid=1562035838&s=gateway&sr=8-12

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Readytosky 2212 920KV Brushless Motors CW CCW for F330 F450 F550 S500 S550 X525 DJI Phantom Quadcopter(4PCS)

Readytosky 2212 920KV Brushless Motors CW CCW for F330 F450 F550 S500 S550 X525 DJI Phantom Quadcopter(4PCS)

Product ID: 46589035

Details

Brand
Readytosky
Model Name
f450 f550
Product Dimensions
1.1"W x 0.94"H
Speed
920 RPM
Voltage
12 Volts

🔇Low noise & ultra-stable operation

🔌3.5mm bullet connectors for easy plug & play

⚙️920KV high-speed brushless motor

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VT16204

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Description

🚀 Elevate your drone game with power, precision, and zero noise—fly like the pros!

PRECISION POWERHOUSE - 920KV brushless motors deliver smooth, high-torque thrust for professional-grade drone builds.
WHISPER QUIET FLIGHT - Engineered for minimal noise and maximum stability, so your drone stands out for performance, not sound.
LIGHTWEIGHT DURABILITY - Crafted from thin, robust aluminum with premium bearings for a crash-resistant, agile flying experience.
PLUG PLAY SIMPLICITY - 3.5mm bullet connectors eliminate soldering hassle—get airborne faster and stress-free.
VERSATILE COMPATIBILITY - Perfectly fits popular frames like F330, F450, F550, S500, S550, and DJI Phantom for seamless upgrades.

The Readytosky 2212 920KV Brushless Motors (4PCS) are high-performance, low-noise motors designed for popular quadcopter frames including F330, F450, and DJI Phantom. Featuring 3.5mm bullet connectors for easy installation, these lightweight aluminum motors provide stable, powerful thrust at 920 RPM, making them ideal for professional drone builders seeking reliable and efficient flight components.

Specifications

ASIN	B075DD16LK
Best Sellers Rank	#123,229 in Toys & Games ( See Top 100 in Toys & Games ) #138 in RC Electric Motors
Brand	Readytosky
Brand Name	Readytosky
Customer Reviews	4.3 out of 5 stars 252 Reviews
Item Dimensions W x H	1.1"W x 0.94"H
Item Weight	0.42 Pounds
Manufacturer	Readytosky
Material	Metal
Material Type	Metal
Model	(B46+B48)*X
Model Name	f450,f550
Part Number	(B46+B48)*X
Product Dimensions	1.1"W x 0.94"H
Shaft Diameter	12 Millimeters
Speed	920 RPM
Voltage	12 Volts

Reviews

G**S

30.06.2025

T**Y

6.03.2023

T**A

30.06.2018

J**R

3.11.2021

A**N

11.06.2021

L**T

30.08.2023

J**K

11.06.2025

F**.

7.04.2019

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