Needles 216x2 NTW SY50301 180/24 Pk 10

The "216x2 NTW" needle size refers to a specific type of needle used in various sewing machines, particularly industrial sewing machines. The "216x2" indicates the needle's type, and "NTW" typically stands for "Needle Thick Wall" or "Needle Tip Wide", which relates to the needle's construction. 

Here's a more detailed breakdown:

• 216x2:

This is a standardized needle system used in many industrial sewing machines. 

• NTW (Needle Thick Wall/Needle Tip Wide):

This designation, while not universally consistent, generally indicates that the needle is designed for thicker materials or may have a wider tip for specific stitching applications. 

• Needle Gauge:

Sewing machine needles are typically measured by their thickness, also known as gauge. The higher the number, the thicker the needle. 

Factors Influencing Needle Size:

• Material: The type of fabric being sewn (e.g., heavy denim, light cotton) influences the needed needle thickness.
• Thread: The thickness of the thread used also affects the needle size.
• Seam Type: Certain seam types may require a needle specifically designed for a wider or thicker tip, like "NTW". 

In summary: 216x2 NTW is a specific needle type and size used in sewing machines, with "NTW" indicating a design feature related to the needle's construction, often associated with heavier materials or specific seam types.