Easy
Less than 15 minutes
Genuine OEM replacement part, this part is sold individually.
This part is where the stringhead assembly is mounted on the Trimmers shown below.
It attaches to the spindle.
The thread mount on the spindle is a left hand thread.
String Head Adapter 678019002
OEM part for: Homelite, Ryobi
Part Number: 678019002
$5.19
In Stock
Ships within 1 business day 
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Product Description ?
- Left-Hand Thread
- Classification: Part
- Weight: 0.03 lbs.
- Shipping: Ships Worldwide
Frequently Purchased Together ?
Compatibility
This String Head Adapter will fit the following 106 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Displaying 20 of 106 matching models.
106 total model matches. Try the above search to narrow your results.
This is the official OEM part for the following brands:
- Homelite
- Ryobi
This item works with the following types of products:
- Trimmer
This part replaces obsolete part #: UT15522D-07, 099068001006, PS04438
Repair Videos ?
Watch the Repair Video for
String Head Adapter
Customer Part Reviews ?
Average Rating (out of 5):
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- 1
Part fit just like new.
Fast shipping and I ordered 2 parts. Got here at the same time and was able to have my string trimmer fixed in minutes. Will use ereplacementparts again.
Guest -
August 26, 2020
Verified Purchase
Part easily researched
Repair was simple.
Guest -
August 19, 2020
Verified Purchase
Proper repair part.
Excellent OEM replacement part for my string trimmer. Worked as advertised.
Guest -
July 15, 2020
Verified Purchase
don't know
still waiting for more parts.
Guest -
October 23, 2019
Verified Purchase
John Deere S1400
Never thought I'd find this part for my 18 year old John Deere trimmer. This is a great place to get hard to find parts. One of my most important bookmarks. Awesome!
Joe -
October 21, 2019
Verified Purchase
easy fix
Part was easy to locate on website, fast to ship, and exactly what I needed.
Guest -
August 29, 2019
Verified Purchase
The part was an exact fit
The part arrived quickly and was in good condition my weed eater works again
Jim -
August 16, 2019
Verified Purchase
the right part. thanks.
It's what I need. thanks.
Guest -
July 13, 2019
Verified Purchase
Almost Perfect
In addition to this adapter, I ordered the angle head drive unit. Fit-up on the String Trimmer was easy and overall a quality part, except for the fact that one of the holes was untapped. Fortunately the clamp on the protective shroud held the head securely in position.
Guest -
June 17, 2023
Verified Purchase
Questions & Answers ?
Our customer Service team is at the ready daily to answer your part and product questions.
Ask our Team
We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
Does this fit my product?Questions & Answers for String Head Adapter
What is the thread size of the left thread bolt that attaches the trimmer head to the bottom of the string trimmer
Cary
for model number Ryobi string trimmer extension
asked on 2022-07-31
Hello Cary, thank you for your question. Our research indicates that size of the thread is 0.63 x 2.25 inches. If you need help placing an order, customer service is open 7 days a week. Please feel free to give us a call. We look forward to hearing from you.
eReplacementParts Team July 31, 2022
Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
Stringhead adapter broke it was old and just snapped off.
Larry - November 10, 2016
👍 5 of 6 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Socket set, Wrench Set
Parts Used
My trimmer took it apart for me as it exploded apart. It's a gas trimmer. The repair was easy. Step one: Figure out how the string head goes together. That's the part that holds the line.
Step two : I slowly started to screw the pieces together-remember this is left hand thread so it's backwards righty loose lefty tighty. Step three: Use the correct socket and tighten the whole head up. Thats it. Took me 15 minutes.
Step two : I slowly started to screw the pieces together-remember this is left hand thread so it's backwards righty loose lefty tighty. Step three: Use the correct socket and tighten the whole head up. Thats it. Took me 15 minutes.
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Stringer head adapter broke
Dnald - September 6, 2016
👍 8 of 12 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Wrench Set, none
Parts Used
Removed broken adapter and installed new one.
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Threads on old part stripped
John - May 2, 2018
👍 3 of 5 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Adjustable Wrench
Parts Used
Remove old part install new
Common sense
Common sense
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Trimmer string head damaged, would not allow string to advance.
Romain - September 8, 2022
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Wrench Set, None
Parts Used
Removed old string head, using socket set replaced with new one from eReplacement Parts. My trimmer now works more efficiently.
Thanks eReplacement Parts.
Romain
Thanks eReplacement Parts.
Romain
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Threads damaged
George - July 29, 2017
👍 1 of 2 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Wrench Set
Screwed on part . Put new trimmer string in
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String adapter stripped.
Richard - April 13, 2017
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Adjustable Wrench
Parts Used
Replaced stringhead adapter.
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The spool retainer was broken
Jacob - July 26, 2018
👍 0 of 1 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, Was able to do it by hand
I replaced the new string head adapter and then secured it with the spool retainer. It was easy. What I really liked about the website was the ease of finding the parts I needed. It was super user-friendly.
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Spool retainer was stripped and string head adapter was damaged.
Grant - October 15, 2017
👍 1 of 3 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Wrench Set
1. Removed the spool retainer.
2. Removed the old string head assembly.
3. Removed the adapter.
4. Reassembled in the reverse order.
2. Removed the old string head assembly.
3. Removed the adapter.
4. Reassembled in the reverse order.
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Stringhead Adapter broke
donald - July 12, 2017
👍 0 of 1 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Wrench Set
Parts Used
with 2 wrenches
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String trimmer bump head wouldn't feed any longer and spindle was bent
Jeff - July 10, 2017
👍 0 of 1 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Wrench Set, Adjustable Wrench
The bottom of my bump head was worn down to nothing and I couldn't get it to come off. I'm not sure whether I continued to tighten it when I tried to remove it, but on a straight shaft (not curved) trimmer, you have to loosen clockwise, so once I finally took it off I separated the housing from the main spindle, which wasn't damaged.
I simply replaced with a whole new replacement housing and string attachment and counter clockwise tightened it on. Works like a charm.
I simply replaced with a whole new replacement housing and string attachment and counter clockwise tightened it on. Works like a charm.
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Learn MoreOur product descriptions are a combination of data sourced directly from the manufacturers who made your product as well as content researched and curated by our content & customer service teams. This content is edited and reviewed internally before being made public to customers.
Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
All our installation videos are created and produced in collaboration with our in-house repair technician, Mark Sodja, who has helped millions of eReplacementParts customers over the last 13 years repair their products. Mark has years of experience in selling and repairing both commercial and residential products with a specialty in gas-powered equipment.
This data is collected from customers who submitted a repair instruction after replacing this exact part. Customers can rate how easy the repair was to complete and how long it took. We aggregate this data to provide a repair rating that allows customers to quickly determine the difficulty and time needed to perform their own repair.
