Needle Thread Guide Screw (414545) for Singer 300U
Ensure the precision of your machine’s thread delivery with this Needle Thread Guide Screw (Part #414545). Specifically designed for the Singer 300U and United Sewing Machine NR models, this screw is the primary fastener used to secure the small, critical thread guide located directly on or near the needle bar.

Key Features & Benefits
High-Precision Fit: Machined to the exact tolerances of part #414545, ensuring a secure, wobble-free mount for the needle thread guide.

Hardened Steel Construction: Manufactured from industrial-grade steel to resist the intense, rapid vibrations of the needle bar during high-speed production.

Low-Profile Design: Features a specialized head shape designed to maintain clearance with the presser foot and other moving parts, even at the lowest point of the needle stroke.

Smooth, Burr-Free Finish: Carefully polished to ensure there are no sharp edges that could snag or fray the thread as it transitions from the guide to the needle eye.

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.