Ryobi · Replacement part

Line Trimmer Spool Retainer Knob 308042003

4.6 · 37 buyer ratings on the source catalog

308042003No photo on file
Match this part by its number, not by appearance.

Reference price$5.00–$9.98

Catalog price as of 2026-05; not a live Amazon price.

Check price on Amazon

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Part number
308042003
Brand
Ryobi
Fits
18 models
Also sold as
Homelite
  • Fitment checked against 18 models
  • Purchase, shipping and returns handled by Amazon
  • Free reference data: RepairKitHub does not sell parts

Does it fit your appliance?

Find it on the data plate inside the door or lid. It is not the serial number.

About this part

308042003 is a Ryobi replacement part (line trimmer spool retainer knob). Our fitment data lists 18 models that use it.

Symptoms this part fixes

  • Broken
  • Loose
  • Missing
  • Won't turn

How to confirm it has failed

Symptom: A cracked shelf, broken door bin, worn hinge, or missing trim piece -- cosmetic and storage wear rather than a functional breakdown.

Check: Match the physical dimensions and mounting tabs of the old part before ordering; these pieces are often model-specific even between visually similar models.

Models that use this part

All 18 confirmed models for this part.
ModelBrandApplianceParts on file
RY30550Ryobi—43
UT32650Homelite—43
RY30530Ryobi—36
RY30570Ryobi—36
RY30931Ryobi—36
RY30951Ryobi—36
RY30971Ryobi—36
RY30160Homelite—29
RY30120Ryobi—25
RY30140Ryobi—22
51934Homelite—16
51970Homelite—16
RY26520Homelite—15
51932Homelite—14
51970AHomelite—13
51972Homelite—10
51990Homelite—8
51990AHomelite—7

Before you order

  • Match the part number character for character, including dashes and trailing letters; a single different character is usually a different part.
  • Confirm your appliance's model number on its data plate and check that it appears in the list above (or use the model lookup tool).
  • If a seller offers a substitute number, check that it appears in this page's replacement list or in the manufacturer's documentation.

Model lookup tool

Frequently asked questions

Which models does 308042003 fit?

Our fitment data lists 18 models that use 308042003, including RY30550, UT32650, RY30530. Enter your model number in the fit checker on this page to confirm.

What symptoms point to a failed line trimmer spool retainer knob?

The source catalog links this part to these symptoms: broken, loose, missing, won't turn.

How much does 308042003 cost?

Catalog prices on file range $5.00–$9.98 (as of 2026-05). The current Amazon price can differ, so check it before you order.