When your string trimmer head cap cracks or the spool cover goes missing, the right replacement part is the difference between a quick fix and a trimmer that throws line unevenly. Two spare parts are on the table: a multi-piece AFS trimmer head cap set and a single Hyper Tough spool cap cover. Both are new replacement parts, but they serve different trimmer families and come with different expectations for fit.
Quick verdict
The Lawn Mower Head Cap Grass Trimmer Parts Garden Power Tools Accessories is the choice if you own an AFS trimmer such as the GH400, GH500, or GH600, or other compatible models like the CST1000, LST136, or ST7000. It gives you three spool covers and three springs, so you have backups for a part that takes regular abuse.
The Garden Tools Parts For Hyper Tough High Quality Lawn Mower Accessories is the choice for Hyper Tough 20V Max cordless string trimmers, including the 12-inch and 13-inch models. It's a single orange spool cap cover, lighter and more affordable, made to match those Hyper Tough heads.
Comparison
| Product | Listed Price | Price Bar | Best For |
|---|---|---|---|
| Lawn Mower Head Cap Grass Trimmer Parts Garden Power Tools Accessories | USD 12.65 | AFS trimmers listed for GH400, GH500, GH600, and compatible electric models | |
| Garden Tools Parts For Hyper Tough High Quality Lawn Mower Accessories | USD 10.46 | Hyper Tough 20V Max cordless 12-inch and 13-inch string trimmers |
Where each part wins
The Lawn Mower Head Cap wins for AFS owners who want spare parts on hand. The set includes three covers and three springs, sized for a 0.065-inch spool, which is a common trimmer line width. It's built for electric models across the AFS GH, LST, NST, and ST series, giving you broader coverage if you own more than one compatible trimmer.
The Hyper Tough Spool Cap Cover wins on price and simplicity. At the lower listed price, it's a replacement matched to Hyper Tough 20V Max trimmers. The single cap weighs about 24g and measures 33 x 75mm, so it's a compact part that doesn't add bulk to the head. If you only need one cover for one specific trimmer, this is the economical path.
Product notes
Lawn Mower Head Cap Grass Trimmer Parts Garden Power Tools Accessories
The AFS-compatible set is a practical multi-pack for anyone running a GH400, GH500, or GH600 trimmer, along with other compatible models such as the GH900, LST136, LST220, LST300, LST400, LST420, NST1118, NST2018, NST2118, and ST6600/ST7700. You get three spool covers and three springs, which cover the two most common wear points on a trimmer head. The spool size is listed as approximately 30 feet of 0.065-inch line, and the part number is AF-100-3ZP. Because it comes as a set, you can keep a backup in the garage. The trade-off is the higher upfront price and the fact that it needs to match your AFS model; the compatibility list is broad but not universal.
Garden Tools Parts For Hyper Tough High Quality Lawn Mower Accessories
This single spool cap cover is designed for Hyper Tough 20V Max cordless string trimmers, including the 13-inch powered trimmer, the 12-inch trimmer, and the trimmer sweeper combo. The orange cap is a direct visual match for the Hyper Tough head style. At 24g and 33 x 75mm, it's a light, low-profile replacement for a missing or worn cover. The package lists one spool cap cover, so you'll need to order again if you're maintaining multiple trimmers. It also doesn't mention springs or additional hardware in the package contents, so make sure the rest of the head assembly is intact.
Final choice by use case
If you own an AFS trimmer from the GH, LST, NST, or ST families and want replacement covers plus springs ready, go with the Lawn Mower Head Cap set at USD 12.65. If you use a Hyper Tough 20V Max cordless trimmer and just need one orange spool cap to get back to work, the Garden Tools Parts Hyper Tough cover at USD 10.46 is the leaner, lower-priced fix. Both are new parts, so the decision comes down to which trimmer you're actually servicing.
