Overview
This aftermarket spool and cap kit replaces the Black+Decker AF-100 / AF-100-BKP / AF-100-3ZP spool assembly for 10-inch through 14-inch string trimmers and lawn edgers. The kit includes six pre-wound spools, two RC-100-P spool caps, and two springs, covering multiple spool changes before you need to reorder. Each spool carries 30 feet of 0.065-inch nylon line for consistent auto-feed performance.
Key specifications
- Quantity: 6 spools + 2 caps + 2 springs
- Line diameter: 0.065 inch (1.65 mm)
- Line length: 30 feet per spool
- Feed type: Auto feed (AFS)
- Replaces OEM parts: AF-100, AF-100-BKP, AF-100-3ZP, 495576-00
Compatibility
Fits Black+Decker string trimmers from 10 to 14 inches, including models BESTA512CM, MTC220, BCSTRB922H1, BCRB922H1, MTE912, LST136, LST140C, BESTE620, NST1118, LCC340C, and many others across the 20V MAX and 40V MAX cordless lines as well as corded units. Verify your trimmer model accepts the AF-100 spool before purchasing.
Installation notes
Press the release tabs on the spool cap to pop it off, remove the old spool, and seat the new pre-wound spool on the spindle. Place the spring below the spool, snap the RC-100-P cap back on, and pull the line through the eyelet. The auto-feed system advances line automatically during use — avoid bumping the head on hard surfaces, which can cause excess line to feed out and waste material.
Common questions
Q: Will this AF-100-BKP spool cap kit fit my Black+Decker LST136 or BESTE620 trimmer, or is it only for older 10-inch models?
Yes, this cap kit is compatible with both the LST136 and BESTE620, and it fits a range of Black+Decker 10-inch to 14-inch string trimmers listed in the product details. If your exact model is one of the listed units like LST136, BESTE620, MTC220, or NST1118, this is the correct replacement style for the spool cap assembly.
Q: I have a Black+Decker MTC220 and the spool keeps popping out during use. Will replacing the cap help with that?
If the spool itself is still in good shape, a worn or cracked cap is often the reason the spool will not stay seated properly on the MTC220. Replacing the spool cap usually restores proper tension and retention, which helps the line feed correctly and keeps the spool from loosening while trimming.
Q: How do I install the AF-100-BKP replacement spool cap on my BESTA512CM, and do I need any tools?
Installation is usually tool-free: remove the old damaged cap, make sure the spool is seated correctly, and then press the new cap into place until it snaps on securely. It is also a good idea to clear out any grass debris around the spool housing before installing the new cap, since buildup can prevent the cap from locking in fully.
