You Make the Bolt, Nut or Screw.
We Coat It.
APET does not manufacture bolts, nuts, screws, studs, washers or any other fasteners — we are a pre-applied coating application specialist. Bolt, nut, screw and fastener manufacturers, as well as forging units, located in and around Faridabad can send their finished components to us for job-work coating. We apply selected threadlocking, nylon patch, thread sealing, and other coating systems and return the processed parts according to the agreed coating specification, quality requirements, quantities, and delivery terms.
Your OEM Customer Wants Coated Bolts, Nuts & Screws. You Don't Need to Build a Coating Line to Supply Them.
Pre-applied threadlocking, nylon patch, and thread sealing coatings may be specified by OEMs and industrial customers for particular fastener applications. For a bolt, nut, screw, or fastener manufacturer, providing coated parts in-house can require additional coating equipment, mixing systems, testing capability, process controls, and quality documentation. APET provides the coating step as job work. You continue manufacturing your bolts, nuts, screws, studs, washers, or other fasteners, while APET applies the specified coating system and returns the processed components according to the agreed requirements. This can allow you to offer coated fasteners without establishing a dedicated coating line within your existing production facility.
APET exists to remove that investment from your side of the equation. You keep manufacturing what you already manufacture — bolts, nuts, screws, studs, washers, or any other fastener — we add the coating step as job work, so you can quote and supply coated parts to your OEM customers without changing your production setup.
How Job-Work Coating Works
You Send Your Finished Fasteners
Arrange transport of your finished, uncoated bolts, nuts, screws, studs, washers, or other components to our HSIIDC Sector-31 facility, together with the applicable coating specification, part details, and torque or performance requirements.
We Apply the Coating
Microencapsulated threadlocking, nylon patch, or thread sealing coating is applied using our available semi-automatic and manual coating systems within our documented quality management processes.
In-House Quality Check
Batch-level quality checks are performed according to the applicable coating requirements, customer specification, and available test methods. Checks may include torque-related testing, heat aging, dimensional verification, coating coverage, or other specified evaluations.
Coated Parts Returned
Coated components are prepared for collection or dispatch according to the agreed delivery arrangement and customer requirements.
Controlled Application. Consistent Results.
APET uses manual and semi-automatic application systems selected according to the component geometry, coating material, batch quantity and customer requirements. Each process is carried out according to the applicable coating specification and agreed quality requirements.
Our Application Process
Component Preparation
Customer-supplied fasteners and components are checked and prepared for the specified coating process.
Surface Preparation
Parts are cleaned and prepared as required for consistent coating application and adhesion.
Controlled Application
The specified threadlocker, thread sealant, nylon patch or other applicable coating is applied using the appropriate manual or semi-automatic application method.
Curing / Setting
Where required, coated components undergo controlled drying, curing or heat treatment according to the applicable material and process requirements.
In-Process Inspection
Coating coverage, application location, appearance and other applicable process parameters are checked.
Quality Testing
Applicable performance and dimensional checks are carried out according to the coating specification and customer requirements. These may include torque-related testing, sealing checks, heat-aging evaluation and dimensional verification.
Packing & Dispatch
Approved components are packed, identified and prepared for collection or dispatch according to the agreed requirements.
Performance Must Be Measured
A pre-applied coating is more than its appearance. Where required, APET performs applicable quality and performance checks to verify that processed components meet the agreed requirements.
Torque Testing
Breakaway and prevailing torque testing for applicable threadlocking and nylon patch applications.
Coating Coverage
Verification of the treated thread area, coating location and application pattern.
Visual Inspection
Inspection for coating consistency, appearance and visible defects.
Dimensional Inspection
Verification of relevant component or coated dimensions where required.
Sealing Checks
Applicable sealing or leak-path evaluation for thread-sealing applications.
Batch Traceability
Production and inspection records are maintained against the applicable batch for traceability and quality documentation.
Application Methods
Manual Application
Flexible application for samples, development work, smaller batches and components requiring specialized handling.
Semi-Automatic Application
Controlled application for repeat production and higher-volume requirements where improved process consistency is required.
The application method is selected according to the component, coating system, quantity and customer specification.
Why Bolt, Nut, Screw & Fastener Manufacturers Partner With APET
- Add pre-applied coating capability to your product range without establishing a dedicated coating line
- ISO 9001:2015 certified quality management system for the applicable scope of operations
- Torque-related, heat-aging, dimensional, and other application-specific quality checks where required
- Coating options: Microencapsulated Threadlocking, Nylon Patch, and Thread Sealing
- 27+ years of combined industry experience
- Located in HSIIDC Sector-31, Faridabad, serving manufacturers in the surrounding industrial region
Coating Options for Your Bolts, Nuts, Screws & Washers
Microencapsulated Threadlocking
Pre-applied adhesive locking for applications requiring controlled threadlocking performance.
Nylon Patch Coating
Prevailing-torque locking for serviceable joints requiring repeated installation and removal, subject to application requirements.
Thread Sealing Coating
Pre-applied sealing for threaded joints where controlled leak-path sealing is required.
Our Coating Facility
HSIIDC Sector-31, Faridabad — equipped with semi-automatic coating machines, manual systems, and homogenization mixing units to support controlled job-work coating across applicable component types and volumes.
Coating Machines
In-House QC
Technical Reference
Job-Work Pickup & Delivery
APET currently offers job-work coating services to eligible fastener and forging manufacturers in and around the Faridabad region, subject to component, coating, quantity, and logistics requirements.
Transport of parts to and from our facility is arranged by the customer. Please get in touch to confirm whether your location falls within our current service area before sending material.
Frequently Asked Questions
Common questions from bolt, nut, screw and fastener manufacturers about APET's job-work coating services.
Get a Job-Work Coating Quote
Share your part type — bolt, nut, screw, stud or washer — thread size, coating requirement and expected volume. We'll review the requirement and confirm feasibility, applicable terms and estimated turnaround for your location.
Request Quote