Metal Compression Limiter Dimensions & Specifications
| Item | Specification |
|---|---|
| Standard | Q/PES001‑2026 |
| Product Name | Compression Limiter |
| Available Types | AY (Standard), BY (Precision), CY (Heavy‑Duty), DY (Oval), EQ (In‑mold embedded elliptical), FQ (In‑mold embedded round) |
| Nominal Thread Sizes | M4, M5, M6, M8, M10, M12 |
| Main Dimension Range | <ul><li>Inner installation diameter S: 0.85 ~ 2.25 mm</li><li>Outer diameter d: 5.0 ~ 18.07 mm</li><li>Length L tolerance: +0 / −C (C = 0.15‑0.20 mm)</li><li>L1 (DY/EQ/FQ): 10.30‑17.00 mm (4‑mm step options)</li></ul> |
| Feature | Both‑end guiding angles (outer for AY/BY/CY/DY; inner for EQ/FQ) |
| Mating Hole Recommendation | Ø, L1, L2 dimensions are specified for corresponding thread size |
| Recommended Length L | 4, 5, 6, 8, 10, 12, 15, 20, 25, 30 mm |
| In‑mold Insert Type (EQ / FQ) | <ul><li>External profile: dot / slot feature (supplier‑designed for press‑out force; not acceptance criteria)</li><li>Marks: ○ Single‑row dotting; ● Single‑slot double‑row dotting; ▲ Double‑slot three‑row dotting</li></ul> |
| Notes | 1. L1 for DY type: 2 mm increment options, tolerance unchanged.2. External dot/slot shape is not acceptance criteria; supplier guarantees press‑out force after assembly. |
- Direct Load Support
The metal limiter provides a rigid load-bearing path for the bolt clamping force, reducing direct compression on the surrounding plastic component.
- Reduced Plastic Deformation
By limiting the amount of plastic compression during tightening, the limiter helps reduce deformation and long-term creep around the fastening point.
- Stable Clamping Performance
The defined load path helps maintain consistent bolt clamping conditions and supports joint stability during long-term service.
Material & Structural Options
- Material Selection
Carbon steel and stainless steel options can be selected according to required mechanical strength, corrosion resistance, and operating environment.
- Wall Thickness & Load Capacity
Wall thickness is selected according to the required compression load and structural requirements, providing adequate resistance to deformation under bolt tightening.
- Length Configuration
Limiter length should correspond to the clamping stack and surrounding component geometry to ensure proper load transfer without excessive compression of the plastic.
Dimensional Fit & Assembly
- Inner Diameter & Bolt Fit
The inner diameter is designed to accommodate the specified bolt size while providing appropriate clearance for assembly.
- Outer Diameter & Plastic Hole
The outer diameter should be matched to the plastic component's hole geometry to achieve the required installation fit and retention.
- Length & Clamping Stack
The limiter length should be coordinated with the total clamping stack to establish the intended compression limit when the bolt is tightened.
- Installation Clearance
Adequate clearance around the limiter should be considered to prevent interference with adjacent features and ensure consistent assembly.
Metal Compression Limiter Installation Types
Molded-In Type
Installed directly during the plastic molding process, allowing the limiter to become integrated with the component as the plastic material forms around it. This design provides stable positioning and is suitable for high-volume molded components.
Press-In Type
Designed for installation into pre-formed holes in plastic components. The interference fit between the limiter and the plastic provides secure retention before bolt assembly, making it suitable for finished or pre-molded plastic parts.
Applications
- Automotive Plastic Components
Used in vehicle plastic parts, structural components, and mounting systems where consistent bolt fastening performance is required.
- Electronic Housings
Applied in plastic enclosures and equipment housings to prevent deformation during screw fastening and maintain structural integrity.
- Industrial Equipment
Suitable for machinery components and plastic structures that require stronger load support and reliable mechanical connections.
- Mechanical Assemblies
Used in plastic-to-metal assemblies to improve connection strength and maintain stable performance under operating conditions.
OEM & Custom Manufacturing
- Custom Dimensions
Inner diameter, outer diameter, length, and wall thickness can be manufactured according to customer drawings and assembly requirements.
- Material Selection
Carbon steel, stainless steel, and other suitable materials can be selected according to load requirements and operating environment.
- Installation Configuration
Press-In and Molded-In designs are available to match different plastic component structures and production processes.
- Drawing-Based Production
We support production based on customer drawings, samples, and technical specifications, with dimensional requirements controlled throughout manufacturing.
Inspection & Performance Verification
- Dimensional Inspection
Critical dimensions including inner diameter, outer diameter, length, and wall thickness are checked to ensure conformity with specified requirements.
- Load-Bearing Verification
Finished components can be evaluated for compression and load-bearing performance to confirm their suitability for the intended fastening application.
- Material Verification
Incoming materials are inspected against specified material requirements before entering production.
- Surface Treatment Inspection
Surface-treated products are checked for coating condition and overall surface quality according to the specified treatment requirements.
- Batch Consistency
Inspection procedures are applied across production batches to maintain consistent dimensions, material properties, and overall product quality.
Metal Compression Limiter manufacturer
CHN Pins is a professional manufacturer of precision pins and metal fastening components, specializing in Dowel Pins, Spring Pins, Coiled Spring Pins, Slotted Pins, Compression Limiters, and other customized metal parts. We provide standard and drawing-based solutions for automotive, machinery, industrial equipment, electronics, and plastic assembly applications.
With in-house manufacturing, dimensional inspection, hardness testing, and controlled production processes, we support customers from specification confirmation and sample development to mass production, providing consistent quality and reliable delivery for long-term B2B projects.
FAQ
Why are metal compression limiters used in plastic assemblies?
Compression limiters are used when bolted joints require controlled load support. They help protect plastic components from excessive compression during assembly and operation.
How do I know if my plastic component requires a compression limiter?
It is usually considered when the assembly uses bolts or screws with high tightening forces, especially when maintaining dimensional stability and joint reliability is important.
Can a compression limiter improve the service life of plastic parts?
Yes. By reducing direct stress on plastic materials, it helps minimize deformation over time and supports more stable long-term performance.
What factors should be considered when selecting a suitable compression limiter?
Important factors include bolt specifications, clamping force, plastic material properties, operating environment, and required load performance.
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