ISO 8752 Heavy Duty Slotted Spring Pins are high-strength, headless spring fasteners engineered with a longitudinal slot that compresses upon installation, creating uniform radial force for a vibration-resistant fit and exceptional double-shear strength in demanding assemblies. Manufactured to strict ISO 8752 and DIN 1481 standards, our slotted pins deliver reliable structural alignment and shock absorption without requiring high-precision reamed holes. As a specialized Slotted Spring Pins Manufacturer, we provide standard metric sizes alongside custom materials, hardness levels, and surface finishes tailored to your exact application needs.
| Item | Specification |
|---|---|
| Standard Title | Spring-type straight pins - Slotted - Heavy duty |
| Nominal Diameter d Range | φ1 ~ φ50 (sizes: 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 10, 12, 13, 14, 16, 18, 20, 21, 25, 28, 30, 32, 35, 38, 40, 45, 50) |
| Pin Diameter before Mounting (Max) | 1.3 ~ 50.9 |
| Pin Diameter before Mounting (Min) | 1.2 ~ 50.5 |
| End Chamfer c Range | 0.15 ~ 4.6 |
| Slot Width h Range | 0.2 ~ 9.5 |
| Minimum Double Shear Strength | 0.7 ~ 1685 kN (steel & martensitic stainless steel only; not specified for austenitic stainless steel) |
| Material Types | Steel (St plain carbon steel / Si silicon manganese steel); Austenitic stainless steel (A); Martensitic stainless steel (C) |
| Surface Condition (Steel) | Natural finish with protective lubricant; plating/coating requires hydrogen embrittlement prevention per ISO 4042; tolerances apply before coating |
| Surface Condition (Stainless Steel) | Natural finish |
| Application Requirement | Hole diameter = nominal diameter with tolerance H12; slot must not fully close when pin is inserted into minimum allowable hole |
| Shear Strength Test | Tested in accordance with ISO 8749 |
| Length Tolerance | l ≤ 100: ±0.25; 10 < l ≤ 200: ±0.5; 200 < l ≤ 500: ±0.75 |
- High Vibration & Shock Resistance
The continuous longitudinal slot allows radial compression upon installation, generating strong, uniform friction against the hole wall to effectively absorb dynamic shocks and prevent loosening.
- Cost-Effective Assembly (No Reaming Required)
Designed for installation directly into standard drilled holes with broader tolerances, eliminating the need for high-precision hole reaming and significantly reducing total machining costs.
- Superior Double-Shear Strength
Manufactured from high-grade spring steel or stainless steel and backed by precision heat treatment, delivering reliable structural retention and long service life under heavy load conditions.
ISO 8752 Slotted Pins Manufacturing Process
Stamping & Roll Forming
High-precision progressive dies stamp and roll spring steel or stainless steel strips into standardized tubular pins with uniform wall thickness and precise slots.
Heat Treatment
Continuous atmospheric heat treatment ensures optimal elasticity, dynamic fatigue resistance, and specified hardness (420–520 HV) without embrittlement.
Surface Treatment
Pins are thoroughly cleaned and coated-options include light anti-rust oil, black oxide, zinc plating, or passivation for enhanced corrosion resistance.
Why Choose Us as Your ISO 8752 Slotted Pins Manufacturer
Specialized Fastener Manufacturer
With extensive expertise in spring pin production, we manufacture strictly to ISO 8752 and DIN 1481 standards, delivering high-precision components trusted by global OEMs and industrial buyers.
Strict Quality Control & Full Traceability
From raw material verification to continuous heat-treatment hardness testing and shear load inspection, every batch undergoes rigorous Quality Assurance to ensure uniform elasticity, maximum fatigue life, and zero defects.
Flexible Customization & Global Delivery
We offer comprehensive OEM/ODM solutions-including custom sizes, non-standard slot designs, specific hardness levels, and advanced anti-corrosion coatings-supported by flexible MOQs and stable lead times to keep your supply chain running smoothly.
FAQ
How do I select the correct hole size for an ISO 8752 spring pin?
The nominal diameter of an ISO 8752 pin directly corresponds to the nominal drilled hole size (e.g., an M6 pin is designed for a 6.0 mm drilled hole, typically with an H12 tolerance). The pin's free outer diameter prior to installation is manufactured slightly larger than the hole; upon insertion, it compresses to generate continuous radial force against the hole wall.
What is the main load difference between ISO 8752 and ISO 13337?
The core distinction lies in wall thickness and double shear load capacity. ISO 8752 specifies a heavy-duty wall section engineered for high mechanical stress, heavy shear loads, and primary power transmission. In contrast, ISO 13337 features a thinner wall design intended for light-duty applications, delicate housings, or thin-walled components where excessive radial expansion force must be avoided.
Can ISO 8752 slotted pins be removed and reused?
Yes. ISO 8752 pins are designed for easy installation and removal using a standard pin punch or pneumatic insertion equipment in through-hole applications. They can be safely reused as long as the pin has not experienced permanent plastic deformation or excessive surface wear during prior service.
What quality testing do you conduct, and do you support custom sizes?
Anhui Pins Metal performs strict quality control on every batch, including 100% dimensional gauge verification, Rockwell hardness testing (HRC), and double shear load testing. In addition to standard metric and inch sizes, we offer full OEM custom manufacturing for non-standard lengths, special chamfers, and protective surface finishes (Black Oxide, Zinc Plating, Phosphating, and Passivation).
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