Part Location Diagram of 678339003 Homelite Guide Bar Nut 5/16-18
See part A-10 in the diagram
( Grid squares measure 1x1 inch )

Guide Bar Nut 5/16-18 678339003

Manufactured by:
Homelite
ERP Number:
ERP16393904
Part Number:
678339003
Original Equipment Manufacturer ?
In Stock
Delivers in 3-5 Business Days!

Easy 

Less than 15 mins 

(5 rated repairs) ?

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Product Description

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This is an OEM approved replacement part designed for use with chainsaws. The primary purpose of this part is to attach the chainsaw bar to the main unit. There are two of these mounting nuts used to secure bar. It is a metal hex flange nut and it is sold individually. You will need a wrench when working with this item.

Troubleshooting

This part works with the following brands:
  • Ryobi
  • Homelite
  • Ridgid
This part works with the following products:
  • Chainsaw
Part# 678339003 replaces these:
678339003,

Customer Part Reviews

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5.0
Average Rating (out of 5):
★★★★★
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(2 Reviews)
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Questions & Answers

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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.

Easy 

Less than 15 mins 

(5 rated repairs) ?
  • 1
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Sprocket drum gear worn. Muffler gasket burnt.

larry from SEMMES, Alabama

6 of 6 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Pliers, Screw drivers
1. Removed the chain cover.
2. Removed the chain and the bar.
3. Removed the e-clip from the sprocket.
4. Removed the sprocket drum.
5. Installed the new sprocket drum.
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Bar was bent

Adam from Penn Yan , New York

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Parts Used:
311030001, 678339003
Removed the chain cover assembly
Reduced the tension on the blade and removed it and the bar
Replace the bar with the new one, installed the chain
Adjusted the chain tension
Attach the chain cover with the new nut
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Damaged guide bar plate, missing guide bar nut

Mike from Avoca, Michigan

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Parts Used:
678339003, 631055005, 631038001
1. Removed existing guide bar nut 5/16-18
2. Removed guide bar cover
3. Installed guide bar plate
4. Installed guide bar cover
5. Fastened guide bar cover with guide bar nuts (2)
6. Adjusted guide bar tension with combination wrench
7. Tightened guide bar nuts with combination wrench
8. Started ch ainsaw
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Lost chain bar nuts.

Rex from BULVERDE, Texas

0 of 1 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Parts Used:
678339003
Put nuts on.
Tightened nuts.
Started saw.
Saw worked.
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Needed new guide bar nut

Jackie from LOBELVILLE, Tennessee

0 of 1 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Tools:
Socket set
Parts Used:
678339003
Simply installed it
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  • 1

Model Cross Reference

This part works with the following models:
ERP Number: ERP16393904
Manufacturer Part Number: 678339003
Brand Model Number Description
Homelite GM10514 Chainsaw - Gm10514 14" 35cc Chain Saw
Homelite GM10516 Chainsaw - Gm10516 16" 38cc Chain Saw
Homelite GM10518 Chainsaw - Gm10518 18" 42cc Chain Saw
Ryobi P2502 Chainsaw - P2502 18 Volt Chain Saw Mfg. No. 107586001 7-28-21 (Rev:02)
Ryobi P2507 Chainsaw - P2507 18 Volt Chainsaw Mfg. No. 107758001 1-7-22 (Rev:01)
Ridgid RD905712 Generator - 5700 Watt Generator
Ridgid RD905712B Generator - Generator
Ryobi RY10518 Chainsaw - 18 in. 46cc Chainsaw
Ryobi RY10519 Chainsaw - Chainsaw
Ryobi RY10519A Chainsaw - 46CC Chain Saw
Ryobi RY10519B Chainsaw - 46CC Chainsaw
Ryobi RY10520 Chainsaw - 20 in. 46cc Chainsaw
Ryobi RY10521 Chainsaw - Chainsaw
Ryobi RY10521A Chainsaw - 46CC Chain Saw
Ryobi RY10521B Chainsaw - 46CC Chainsaw
Ryobi RY3714 Chainsaw - 37cc Chain Saw
Ryobi RY3714VNM Chainsaw - Ry3714vnm 38cc Chain Saws Mfg. No. 095382013 8-3-21 (Rev:02)
Ryobi RY3716 Chainsaw - 37cc Chain Saw
Ryobi RY3716VNM Chainsaw - Ry3716vnm 38cc Chain Saws Mfg. No. 095382012 8-3-21 (Rev:02)
Ryobi RY3818 Chainsaw - Chain Saw
Ryobi RY3818VNM Chainsaw - Ry3818vnm 18 In. 38cc Chain Saw Mfg. No. 095382011 8-3-21 (Rev:02)
Ryobi RY405010 Chainsaw - Ry405010 40 Volt 14 In. Chainsaw Mfg. No. 107507010 8-19-21 (Rev:01)
Ryobi RY40502 Chainsaw - Chain Saw
Ryobi RY40503 Chainsaw - 40 Volt Chain Saw
Ryobi RY40503VNM Chainsaw - Ry40503vnm 40 Volt Chain Saw Mfg. No. 107507101 11-10-20 (Rev:06)
Ryobi RY40505 Chainsaw - 40 Volt Chain Saw
Ryobi RY40507 Chainsaw - Ry40507 40 Volt 10 In. Chainsaw Mfg. No. 107587001 7-15-21 (Rev:02)
Ryobi RY40508 Chainsaw - Ry40508 40 Volt 18 In. Brushless Chain Saw Mfg. No. 107404001 10-9-20 (Rev:01)
Ryobi RY40509 Chainsaw - Ry40509 40 Volt 12 In. Brushless Chainsaw Mfg. No. 107895001 12-8-21 (Rev:01)
Ryobi RY5020 Chainsaw - 50cc Chain Saw