Husqvarna 530016338 Muffler Bolt – Genuine OEM Replacement Exhaust Fastener
Part Number: 530016338
Category: Chainsaw Engine, Muffler & Exhaust Components
Type: Muffler Bolt / Screw – Genuine OEM Replacement Exhaust Fastener
The Husqvarna 530016338 Muffler Bolt is a genuine OEM replacement exhaust-system fastener designed for select Husqvarna chainsaws, trimmers, hedge trimmers, blowers, and other compatible handheld outdoor power equipment.
Product Specifications
- Part Number: 530016338
- Manufacturer: Husqvarna
- Product Type: Muffler Bolt / Muffler Screw
- OEM Description: Screw, Muffler
- Alternate Description: Muffler Mounting Screw / Exhaust Bolt / Muffler Fastener
- Fastener Style: Hex Socket Head
- Component Type: Engine Exhaust Mounting Hardware
- Function: Secures the Muffler Assembly to the Engine
- System: Engine Muffler / Exhaust System
- Primary Application: Chainsaw / Handheld Outdoor Power Equipment
- Compatible Brand: Husqvarna
- Additional Applications: Select Poulan / Poulan Pro / Craftsman / Weed Eater / Jonsered / RedMax / Snapper Equipment
- Installation Location: Muffler / Engine Exhaust Assembly
- Associated Components: Muffler / Muffler Gasket / Exhaust Plate / Spark Arrestor / Cylinder
- Installation Tool: Hex Key / Allen Wrench
- Replacement Type: Direct OEM Replacement
- OEM Status: Genuine Husqvarna OEM Part
- Condition: New
- Quantity: 1 Muffler Bolt
- Part Number Reference: 530016338
- Alternate Number Format: 530 01 63-38
- UPC: 705788540945
The UPC and OEM identification are documented by Husqvarna-parts listings, while multiple OEM-parts references confirm the hex-socket-head design.
Features & Benefits
- Genuine Husqvarna OEM replacement fastener
- Factory-designated Muffler Screw
- Designed to secure compatible muffler assemblies
- Hex-socket-head configuration
- Designed for use with a hex key / Allen wrench
- Helps maintain proper muffler positioning
- Helps maintain a secure exhaust-system connection
- Designed to withstand engine vibration and exhaust-system operating conditions
- Maintains the original equipment hardware configuration
- Used on numerous Husqvarna-family handheld products
- Suitable for chainsaw exhaust-system repairs
- Sold individually for replacement as needed
- Ideal replacement for missing, stripped, damaged, or loose muffler hardware
- Direct replacement for applications requiring 530016338
- Genuine OEM hardware rather than an unspecified universal bolt
Muffler Bolt Function
The muffler on a small two-stroke engine is mounted directly at or near the engine's exhaust outlet. Secure mounting is important because the muffler is subjected to:
- Engine vibration
- Repeated heating and cooling cycles
- Exhaust pressure
- Equipment movement
- Normal operational shock and vibration
The 530016338 fastener helps hold the muffler securely in its specified position against the engine.
A properly secured muffler assembly helps maintain the intended exhaust-system configuration.
Hex Socket Head Design
The 530016338 Muffler Bolt uses a hex socket head.
This means the fastener is installed and removed using an appropriately sized:
- Allen wrench
- Hex key
- Hex-bit socket
OEM replacement-parts documentation specifically identifies the fastener as a hex-socket-head bolt.
Use a properly fitting tool to reduce the possibility of damaging the internal hex drive.
Documented Husqvarna Applications
The 530016338 Muffler Bolt is documented on numerous Husqvarna chainsaws, including select:
- Husqvarna 120 Mark II
- Husqvarna 120e Mark II
- Husqvarna 136 LE
- Husqvarna 137
- Husqvarna 137 E
- Husqvarna 141 LE
- Husqvarna 142
- Husqvarna 142 E
- Husqvarna 235
- Husqvarna 235 E
- Husqvarna 240
- Husqvarna 240 E
Parts catalogs also document the fastener on select handheld equipment such as the Husqvarna 125LDX trimmer.
Exact fitment should always be verified using the complete equipment model, product number, and production revision.
Compatible Equipment Types
Depending on model, 530016338 is documented for:
- Chainsaws
- String trimmers
- Hedge trimmers
- Leaf blowers
- Blower/vacuums
- Other compatible handheld outdoor power equipment
Chainsaws are among the most common documented applications for this muffler fastener.
Compatible Brands
OEM-parts references document 530016338 across select equipment from:
- Husqvarna
- Poulan
- Poulan Pro
- Craftsman
- Weed Eater
- Jonsered
- RedMax
- Snapper
Compatibility is model-specific and does not mean the bolt fits every product from these manufacturers.
Husqvarna 120 Mark II Muffler Assembly
The Husqvarna 120 Mark II provides a useful example of how 530016338 is used within an exhaust assembly.
Its documented muffler assembly includes:
- Exhaust plate
- Spark arrestor screen/gasket
- 530016338 Bolt – Quantity 2
- Muffler assembly
- Muffler gasket
- Muffler back plate
- Spark arrestor kit
This confirms that the 530016338 functions specifically as muffler mounting hardware and that some applications require more than one bolt.
Common Reasons for Replacement
Replacement of the 530016338 Muffler Bolt may be appropriate if the original fastener has:
- Fallen out
- Become loose
- Been lost during muffler service
- Developed damaged threads
- Become stripped
- Developed a rounded hex socket
- Become bent
- Broken
- Developed corrosion
- Sustained heat-related damage
- Become difficult to tighten correctly
- Been damaged during exhaust-system disassembly
- Become unsuitable for reuse
Engine vibration can contribute to exhaust-hardware loosening when the fastener or surrounding components are no longer in proper condition.
Possible Signs of Loose Muffler Hardware
A missing, damaged, or loose muffler bolt may contribute to:
- Loose muffler assembly
- Muffler vibration
- Rattling from the exhaust area
- Exhaust leakage
- Muffler movement
- Increased equipment noise
- Damaged muffler gasket
- Visible gap between the muffler and mounting surface
- Repeated loosening of surrounding exhaust hardware
These symptoms can also result from damaged muffler components, stripped cylinder threads, a failed gasket, or other exhaust-system problems.
Muffler System Inspection
When replacing 530016338, inspect the surrounding:
- Muffler
- Muffler gasket
- Cylinder exhaust port
- Muffler mounting surface
- Exhaust plate
- Muffler back plate
- Spark arrestor
- Threaded mounting holes
- Other muffler bolt
- Heat shields or covers where applicable
A replacement bolt cannot properly secure the muffler if the mating threads or mounting components are severely damaged.
Thread Inspection
Before installing the replacement bolt, inspect the mating threads for:
- Stripping
- Cross-threading
- Carbon contamination
- Corrosion
- Debris
- Previous fastener damage
- Cracking around the mounting area
If the original bolt repeatedly loosens or will not tighten correctly, inspect the threaded mounting point rather than simply installing another bolt.
Installation Considerations
Before replacing the muffler bolt:
- Shut off the equipment.
- Allow the engine and muffler to cool completely.
- Disconnect the spark plug where appropriate.
- Identify the correct fastener location using the OEM parts diagram.
- Remove damaged or remaining muffler hardware.
- Inspect the muffler and mounting surface.
- Inspect the muffler gasket.
- Clean the mounting threads as appropriate.
- Align the muffler correctly.
- Start the 530016338 bolt carefully by hand.
- Use the correct hex key or hex-bit tool.
- Tighten according to the applicable manufacturer's specification.
- Verify that the muffler is securely mounted before operating the equipment.
Important Notes
- Verify compatibility with your exact equipment model, product number, type number, and production revision before ordering.
- Match part number 530016338 directly with your equipment's OEM illustrated parts diagram.
- The OEM description is commonly “Screw, Muffler.”
- This component may also be described as a Muffler Bolt or Muffler Mounting Screw.
- It is a hex socket head fastener.
- A hex key / Allen wrench is typically required for removal and installation.
- The fastener is sold individually.
- Some equipment uses two 530016338 bolts to secure the muffler.
- Do not assume two bolts are included when ordering a quantity of one.
- UPC is 705788540945.
- Do not substitute an arbitrary hardware-store bolt based solely on approximate appearance.
- Muffler fasteners operate in a high-temperature, high-vibration environment.
- Fasteners with similar dimensions can differ in thread specification, length, head configuration, material, strength, and intended application.
- Use 530016338 as the primary fitment reference.
- Do not force the bolt into damaged or incompatible threads.
- Start the fastener carefully to avoid cross-threading.
- Do not overtighten the muffler bolt.
- Follow the applicable manufacturer torque specification when available.
- Inspect the other muffler fasteners whenever one bolt has loosened or fallen out.
- Inspect the muffler gasket for leakage or damage.
- Replace a damaged muffler gasket separately where necessary.
- Do not automatically apply thread-locking compound unless specified by the applicable service procedure.
- Exhaust components become extremely hot during operation.
- Allow the muffler and engine to cool completely before servicing.
- Never operate the equipment with a loose or improperly secured muffler.
- Disconnect the spark plug before performing exhaust-system repairs where appropriate.
- This listing is for one Husqvarna 530016338 Muffler Bolt / Screw only unless otherwise specified. Muffler, gasket, exhaust plate, spark arrestor, additional bolts, and other exhaust components are sold separately unless explicitly included.
- Match Husqvarna 530016338 with your equipment's OEM parts diagram before ordering to ensure proper fitment.
