Assembly Services for Shipment-Ready OEM Metal Products
Reduce supplier handoffs by combining metal fabrication, surface finishing, component supply and mechanical assembly under one controlled order. Yishang prepares complete enclosures, cabinets, housings, frames and other metal products for inspection, protective packaging and repeat OEM delivery.
- Screws, rivets, self-clinching hardware, hinges, latches, handles, gaskets, slides and casters
- Yishang-sourced, customer-supplied or mixed component programs
- Sample and first-article assembly before batch production
- Drawing, BOM, appearance and basic mechanical function checks
metal products from controlled files
approved hardware and components
defined sequence and checks
protected, packed and batch ready
Stop Managing the Final Build Across Multiple Suppliers
A low fabrication price can become an expensive order when finished products, hardware and packaging move between different vendors. Purchasing then carries the risk of missing components, mixed revisions, scratched finishes and urgent rework just before shipment.
Our metal assembly services bring those final decisions into the same production route, so the approved product arrives in the agreed assembled condition instead of as an unresolved collection of deliveries.
Assembly stops because a latch, hinge, gasket, slide or special fastener was not ordered against the approved BOM.
Metal products and purchased components may be correct individually but belong to different drawing or BOM releases.
Coated, brushed or polished surfaces can be scratched when unpacked, moved, reworked and packed again.
Hole position, gasket compression, door alignment or tool access may fail only when the full product is assembled.
Loose hardware and incomplete subassemblies shift sorting, rework and schedule pressure to your own team.
Mechanical Assembly Built Around the Finished Product
Choose the assembly depth that matches how you want the product to arrive, from installed hardware to a complete shipment-ready mechanical assembly.
Fasteners & Joining Hardware
Install screws, nuts, washers, rivets, threaded inserts and self-clinching hardware with suitable access, tooling and installation sequence.
Functional Hardware
Fit hinges, latches, handles, gaskets, slides, rails, casters and mechanically mounted fans or modules without wiring.
Complete OEM Assembly
Combine fabricated and finished metal products with approved purchased components, perform agreed checks and pack the completed product for delivery.
Project-specific scope: hardware suitability, installation method, access, acceptance checks and final shipment condition are confirmed from the drawing, BOM and approved assembly reference.
Choose How Components Enter the Build
You can ask Yishang to source approved mechanical components, send your own controlled items, or use a mixed model. The important point is that every tray is linked to the same drawing, BOM revision and assembly quantity before the first build begins.
We purchase against approved brands, model numbers or confirmed equivalents. Any proposed alternative is returned for approval before use.
Consigned components are accepted subject to agreed incoming count, visible condition, storage and responsibility for shortages or defects.
Standard fasteners can be sourced with the metal products while proprietary, branded or controlled components are supplied by the customer.
Hardware is grouped by product and assembly stage to reduce searching, mixing and missed installation points.
A supply shortage does not silently change the finished product. Alternatives require confirmation before the BOM or work instruction is updated.
An Assembly Workflow Purchasing Can Follow
Each stage resolves a specific risk before more finished products and components are committed.
1. Drawing & BOM Review
Confirm revision, assembly condition, approved hardware, supply responsibility, quantity, cosmetic areas and required checks.
2. Source or Receive
Purchase approved components or receive customer-supplied items, then check the agreed count and visible condition.
3. Kit & Plan
Organize hardware by product and operation, define tool access, sequence, fixtures and protection for finished surfaces.
4. First Assembly
Build the sample or first article, resolve fit and sequence questions, and obtain approval where the program requires it.
5. Batch Assembly & Check
Use the controlled files and agreed work method for hardware presence, fit, appearance and basic mechanical function checks.
6. Protect, Pack & Deliver
Separate cosmetic surfaces, secure moving features, include agreed loose items and pack to the approved shipment condition.
A Product Can Be Easy to Fabricate and Still Be Expensive to Assemble
Fasteners hidden behind bends, gaskets with no retention, stacked tolerances and hardware installed after a sensitive finish can create repeat problems. Before batch release, we review the design as an assembly sequence rather than as separate drawings.
Provide practical clearance for drivers, rivet tools, presses, nuts, washers and removal where serviceability matters.
Identify the interfaces that control door gaps, slide movement, latch engagement, gasket seating and mating-product fit.
Decide which hardware is installed before or after coating, masking, welding and final surface protection.
Use tabs, stops, asymmetric features, fixtures or clear orientation where they reduce reversal and alignment risk.
Recommended geometry or sequence changes are sent for customer approval before controlled files are released.
Check the Complete Product, Not Only the Individual Components
Mechanical assembly services are controlled against the agreed drawing, BOM, work instruction and approved first reference. Inspection focuses on the characteristics that affect receiving, installation and product appearance.
Verify the released drawing, component identity, approved substitutions and required quantities before assembly.
Check that specified hardware is installed in the correct location, direction and sequence.
Torque is controlled or recorded only when a value, tool method and acceptance requirement are specified and agreed.
Check agreed door, hinge, latch, slide, caster or handle movement, fit and gasket seating without electrical operation.
Inspect selected interfaces, alignment, finish damage and cosmetic areas using the agreed acceptance criteria.
Quality boundary: structural load, safety, regulatory, ingress protection, leak, life-cycle, vibration, thermal and certification testing are outside the standard scope unless separately specified and accepted.
Finish Protection and Packaging Belong in the Assembly Plan
The final assembly stage is also the last chance to prevent cosmetic damage, loose hardware and movement in transit. Packing is planned around the product shape, finish sensitivity, moving features and customer receiving method.
Use approved film, non-abrasive separators, bags or protective contact materials for finished faces.
Secure doors, drawers, slides, handles, casters or other moving features where transport could cause impact.
Bag and identify agreed spare or field-installed hardware rather than leaving it free inside the product.
Foam, corner protection, cartons, crates, pallets and labels are selected only from the approved packing requirement.
Retain the agreed packing arrangement and first-build findings for future OEM batches.
From Fabricated Metal to a Receiving-Ready Product
Instead of coordinating separate fabrication, finishing, hardware purchasing, assembly and packing orders, use one project owner to keep the revision and shipment condition aligned.
- Fabrication: cutting, punching, bending, machining, welding and hardware preparation as the product requires.
- Surface finishing: approved coating, painting, plating, anodizing, brushing, polishing or other project-specific finish routes.
- Component control: approved sourcing, customer-supplied items, incoming responsibility and kitting.
- OEM assembly: defined mechanical sequence, first-build confirmation and batch execution.
- Delivery: agreed inspection evidence, finish protection, custom packing and repeat-order reference.
No electrical assembly, wiring, electrical functional testing or electronics integration is included.
Replace Five Purchase Orders with One Finished-Product Order
An equipment buyer needs powder-coated mobile cabinets with drawers, slides, casters, handles, doors, gaskets and special customer-selected latches. Yishang fabricates and finishes the metal products, sources approved standard hardware, receives the controlled latches, completes the mechanical assembly and checks the agreed movement and appearance points before packing.
The buyer receives the cabinet in the defined shipment condition and manages one product revision instead of separate metal, hardware, assembly and packaging deliveries.
This example describes a typical workflow, not a claim about a named customer, fixed saving, guaranteed schedule or product certification.
Assembly Services RFQ Checklist
Files & Revision
Assembly drawing, 3D CAD if available, product drawing, BOM, revision and any approved first reference.
Component Responsibility
Approved brands or model numbers, permitted alternatives and which items Yishang or the customer will supply.
Checks & Records
Critical interfaces, movement checks, appearance criteria, torque requirements and any requested inspection record.
Quantity & Delivery
Sample count, batch quantity, repeat forecast, assembled condition, packing method, labels and requested timing.
If an NDA is required, request it before transferring confidential drawings, BOMs or product information.
Before You Release an OEM Assembly
A reliable assembly quotation begins with one controlled revision, a clear component supply plan and agreement on what will be checked before packing.
The route can include fabricated and finished metal products, approved mechanical component sourcing, kitting, screws, rivets, self-clinching hardware, hinges, latches, handles, gaskets, slides, casters, complete mechanical assembly, agreed checks and custom packaging.
No. The standard scope is mechanical assembly only. We do not provide wiring, wire-harness installation, electrical box-build, electronics integration or electrical functional testing.
Yes. Yishang-sourced, customer-supplied and mixed programs are supported. The quotation defines approved brands or model numbers, alternatives, incoming responsibility, shortages and the approval route for changes.
Yes, after the hardware type is matched to the hole size, sheet material, thickness, hardness, edge distance and required installation method. Suitability is confirmed for the actual design rather than assumed universally.
Yes, when the drawing or approved work instruction defines the fastener, target value, tool method and acceptance requirement. We do not apply one universal torque value to different products and joints.
These materials can be applied only when the approved specification identifies the product, location, amount or method, surface compatibility and acceptance requirement.
Yes. A sample or first assembly can be used to confirm fit, sequence, component choice, appearance and packing before the approved method is carried into batch production.
Agreed checks may cover door and hinge movement, latch engagement, slide travel, caster movement, handle fit, gasket seating, hardware presence and selected mating interfaces. Test method and acceptance criteria must be defined for the project.
A requested inspection record, marked drawing, component checklist, photos or packing reference can be quoted when the required characteristics and reporting format are stated before production.
Yes. Packaging can include surface film, separators, bags, foam, corner protection, cartons, crates or pallets according to the approved shipment condition and handling needs.
No. Structural load, safety, regulatory, ingress protection, leak, life-cycle, vibration, thermal and certification requirements need separate test conditions, responsibility and qualified acceptance criteria.
Send Your Drawing and BOM for an Assembly Review
Tell us the required assembled condition, which components we should source, which items you will supply, the sample and batch quantities, the checks that matter and how the finished product should be packed.
sales@zsyishang.com
