Fits our R10231, R10638 & R10639 Trimmer Heads
5/16-18 Left hand nut

Replaces Echo 157410
Used on old style Tap-N-Go head with foam rings.

Fits our R10231, R10638 & R10639 Trimmer Heads

FITS OUR #7897 TRIMMER HEAD  
REPLACES STENS 385-658, STENS 385504 & SUNBELT B1SB8221.

Replaces HUSQVARNA 537186301
Fits midels 123, 223, 322, 323, 325 & 326 trimmers.
Size: 2-1/4" Length, 1-7/8" Width, 3/8" Height

Replaces Homelite A97910A, 308042003
Fits Homelite EZ Line Advance Systems with left hand threads. (red)

Replaces Stihl 4203 120 1500
Fits Stihl B420 blowers
Fits our 10963 & 12081 filter.

Replaces Echo 215705, Shindaiwa 72005-92660, Stihl 0000 997 2300
Fits compact twist feed and heavy-duty twist feed trimmer heads

Replaces Poulan PRO-150, PRO-200, XR90, XR95, 1000,0698, 698-01
.095" Diameter nylon monofilament
35ft. (11.6yd-16.6m.)

R10638-BUMP & FEED TRIMMER HEAD FITS STIHL W/ 10MM X 1.0 LHF

Replaces Murray 740157, MU740157