Thread Guide Screw (414539) for Singer 300U
Maintain a stable and precise thread path with this Thread Guide Screw (Part #414539). Specifically engineered for the Singer 300U and United Sewing Machine NR models, this screw is essential for securing the thread guides to the machine frame or needle bar assembly.

Key Features & Benefits
Vibration-Resistant Grip: Designed with precision threads that stay tight during high-speed operations, preventing thread guides from shifting and causing tension issues.

Hardened Steel Durability: Manufactured from industrial-grade tool steel to resist the constant stress of production and prevent the head from stripping during maintenance.

Precision Low-Profile Head: Engineered to sit flush or within tight clearances, ensuring the screw doesn't snag the thread as it travels through the machine.

Anti-Corrosive Finish: Features a protective coating to prevent rust and degradation from exposure to industrial lubricants and humidity.

Orders are typically processed within 1–3 business days.

We ship from our Georgia, USA warehouse. If an item is temporarily unavailable in the U.S., we source it through our global supplier network and will notify you of the estimated lead time.

Free shipping is available on U.S. orders over $99.

Once your order ships, you will receive a tracking number by email.

For urgent orders or shipping questions, please contact us before placing your order.

We stand behind the quality of the products we sell.

• Genuine OEM parts are covered by the manufacturer's warranty where applicable.

• Aftermarket and generic parts are covered against manufacturing defects.

• If you receive a damaged, defective, or incorrect item, please contact us within 30 days of delivery.

• Warranty does not cover damage caused by improper installation, misuse, normal wear, or modifications.

If you have any questions, our support team is happy to help before or after your purchase.