DWO1DT995 Weed Trimmer Head Cap Replacement for Dewalt String Trimmer Head with Weedeater Spring and Cap ‎Parts, String Trimmer Cap Cover for Dewalt DCST922P1 DCST922B DCST972X1, Black

What It Is

This is a replacement cap and spring assembly for the bump-feed head on Dewalt 20V MAX string trimmers. It secures the spool and provides the tension needed for the line to advance when you tap the head on the ground.

Fitment & Compatibility

• Exact models: Fits Dewalt DCST922P1, DCST922B, and DCST972X1 trimmers. Also compatible with any Dewalt trimmer using the same bump-feed head design (check your model’s part list for DWO1DT995).
• What to measure: The cap diameter is roughly 2.5 inches. If your existing cap is cracked or the spring is weak, this should match.
• OEM vs aftermarket: This is a genuine Dewalt replacement part, not a third-party knockoff. That means guaranteed fit for the listed models, but slightly higher cost than generic alternatives.
• Check your spool: This cap only works with the factory-style spool. If you’ve replaced the spool with an aftermarket one, verify it uses the same center pin and spring mechanism.

Key Things to Know

• Installation is simple: Remove the old cap and spring, drop the new spring into the head, and snap the cap on. No tools required.
• Common gotcha: The spring is small and can pop out easily. Work over a towel or tray to avoid losing it.
• Quality note: The plastic cap is sturdy but can crack if overtightened or if you drop the trimmer on concrete. The spring is zinc-plated and resists rust reasonably well.
• Price vs value: At $8, it’s cheap insurance if your current cap is broken or the spring has lost tension. Buying a whole new head assembly costs 3–4x more.

Should You Buy It

Buy this if your Dewalt trimmer’s bump-feed head is failing—cap cracked, spring weak, or line won’t advance. It’s a fast, inexpensive fix that restores full function. Skip it if your head is fine or if you’re using a different brand of trimmer.