Bump Head Knob 5/16″ - 18 Unc Left Hand Male Thread by GA Spares

Keep your line trimmer running at its best with this replacement bump head knob, SKU BRM5616, from GASPARES. Manufactured with a 5/16" - 18 UNC left hand male thread, this knob is designed to suit bump feed trimmer heads where the spool is secured by a left hand threaded fastener. The left hand thread is a common design on many brushcutter and whipper snipper bump heads, helping to keep the spool locked in place during normal cutting rotation. Made as a durable, high-quality replacement part, it offers a straightforward fit for compatible Homelite and BCR style bump feed heads, making it a practical spare to keep on hand for routine maintenance. Always check your machine's thread direction and size before ordering to ensure correct fitment.

• 5/16" - 18 UNC left hand male thread for correct fitment on compatible bump feed trimmer heads
• Durable construction suited to regular outdoor trimming use
• Simple replacement part that helps restore secure spool retention on your line trimmer

• Homelite bump feed line trimmers and brushcutters
• BCR series bump head trimmer assemblies
• Bump feed trimmer heads using a 5/16" - 18 UNC left hand male threaded knob

Bump Head Knobs – replacement trimmer head knobs and spool fasteners for brushcutters and line trimmers.