Description
M013 M4x6 Cup-Head Hexalobular Block Rod Retaining Screw for GK9 Portable Bag Closer
The M013 M4x6 Cup-Head Hexalobular Screw is a precision replacement fastener designed for securing internal alignment shafts, axis pins, and transmission blocks in GK9 portable bag closer machines. Manufactured with a precision M4 metric thread and 6mm length, this screw helps maintain the correct positioning of critical mechanical components, supporting smooth and reliable bag stitching performance.
Its low-profile cup head combined with a hexalobular socket drive provides secure tightening while minimizing the chance of driver slippage during installation and maintenance. Whether you are replacing a worn retaining screw or performing preventive servicing, the M013 screw restores the original fastening strength required for continuous machine operation.
Please verify part number M013, thread size, and your machine’s parts diagram before purchasing.
Key Features
- Precision M4 metric thread
- 6mm overall screw length
- Low-profile cup-head design
- Hexalobular socket drive for positive tool engagement
- Designed for internal mechanical assemblies
- Helps secure alignment shafts and retaining blocks
- Suitable for routine machine servicing
- Pack quantity: 1 Piece
Compatible Machines
The M013 Block Rod Retaining Screw is compatible with handheld portable bag closer machines built on the GK9 platform, including:
- GK9-2
- GK9-8
- GK9-18
- GK9-18A
- GK9-200
- GK9-350
- GK9-500
- GK9-900 (including cordless battery variants)
- GK9-1001
It is also compatible with many equivalent handheld bag closer machines manufactured by:
- Newlong-style portable bag closers
- Flyingman
- Revo
- Gemsy
- Zoje
- Moonstar
- Other standard China-made handheld bag stitching machines
Always compare the existing screw with your machine’s parts diagram before ordering.
Primary Application
The M013 screw functions as a retaining fastener for important internal transmission components.
Its primary application is securing the:
This screw locks the shaft firmly inside the machine housing, helping prevent shaft movement or gradual displacement during continuous high-speed stitching.
It may also be used for securing:
- Internal alignment shafts
- Axis pins
- Transmission blocks
- Structural retaining components
Why Replace the M013 Retaining Screw?
A worn, stripped, or loose retaining screw can reduce the stability of internal mechanical assemblies. Replacing it helps:
- Maintain proper shaft alignment
- Prevent drivetrain play
- Keep transmission components securely positioned
- Reduce vibration-related loosening
- Support smooth feed dog movement
- Maintain accurate needle linkage timing
- Extend the service life of surrounding components
Routine replacement during scheduled maintenance can improve the overall reliability of your portable bag closer.
Packaging Materials Supported
Although the M013 screw does not contact the bag directly, it plays an important role in maintaining the internal alignment required for stitching heavy-duty packaging materials, including:
- Woven polypropylene (PP) sacks
- Jute bags
- Burlap bags
- Canvas bags
- Mesh bags
- Multi-wall kraft paper bags
Proper internal fastening helps the machine deliver consistent feeding and stitching across demanding industrial packaging applications.
Installation Guide
- Disconnect the machine from its power source or remove the battery.
- Locate the existing M013 retaining screw.
- Carefully remove the old or damaged screw.
- Position the A054 Parallel Axis Block Pin Shaft correctly inside the housing.
- Install the new M013 M4×6 screw.
- Tighten using the correct hexalobular driver until secure.
- Check that the shaft remains firmly retained and that moving parts operate freely.
Avoid excessive tightening, which may damage the threads or surrounding components.
Machine Compatibility Table
| Machine Type | Compatible |
|---|---|
| GK9-2 | Yes |
| GK9-8 | Yes |
| GK9-18 | Yes |
| GK9-18A | Yes |
| GK9-200 | Yes |
| GK9-350 | Yes |
| GK9-500 | Yes |
| GK9-900 | Yes |
| GK9-1001 | Yes |
| Compatible China-made GK9 Portable Bag Closers | Yes |
Frequently Asked Questions
What is the function of the M013 screw?
The M013 screw secures internal alignment shafts, transmission blocks, and the A054 Parallel Axis Block Pin Shaft, helping maintain the correct positioning of key drivetrain components.
What are the specifications of this screw?
It features a precision M4 metric thread, 6mm length, a low-profile cup head, and a hexalobular socket drive.
Which machines is this screw compatible with?
It fits many GK9 portable bag closer models, including GK9-2, GK9-8, GK9-18, GK9-18A, GK9-200, GK9-350, GK9-500, GK9-900, and GK9-1001, along with many compatible China-made handheld bag closers.
Does this screw directly touch the bag material?
No. It is an internal mechanical fastener that secures drivetrain components. Its role is to maintain proper machine alignment rather than contact the packaging material.
Should I verify compatibility before ordering?
Yes. Always compare the part number, thread size, dimensions, and your machine’s parts diagram before purchasing.
