Metric Spring Plungers with Hex Socket | Stainless Steel Body & POM Pin Options – sinoboltco

Standard metric threaded spring plungers manufactured by Shanghai Sinoboltco Technology Co., Ltd. for locating, locking, and indexing positions in industrial machinery, welding jigs, and production lines. Optimized for standard high-volume manufacturing processes with repeatable spring force output and uniform dimensions.

Material Configurations

All-Stainless Steel Series: SUS304 body, pin, and internal spring. Formulated for standard heavy-duty wear applications requiring mechanical shear strength and baseline corrosion resistance in non-acidic industrial environments.

POM Pin Series: SUS304 body and spring combined with an extruded Polyoxymethylene (POM) pin. Applied in low-load configurations to eliminate surface scratching on mating aluminum workpieces and minimize metal-on-metal sliding noise.

Technical Specifications

Thread Sizes: Standard metric coarse threads (M5, M6, M8, M10, M12) for compatibility with mass-produced tapped holes.

Drive Mechanism: Internal hexagon socket for low-clearance flush installation via standard hex tooling.

Dimensional Control: Managed pin diameter ($d$) and stroke length ($S$) tolerances to ensure consistent detent seating without binding.

Interchangeability: Formulated to global standard commercial dimensions; cross-references as a direct drop-in replacement under internal part number snsp000006.

Technical Performance & Features

Optimized Force Ratings: Spring end forces streamlined into two standard industrial load profiles, mitigating spring fatigue and minimizing component lead times.

Surface Protection: POM pin variants isolate friction to protect anodized aluminum and polished steel tool plates from surface wear.

Fluid and Oil Resistance: SUS304 housing and springs resist degradation from standard workplace humidity, machine lubricants, and cutting fluids.

Procurement Traceability: Standardized under the snsp000006 protocol to ensure structural and batch-to-batch consistency for global spot-buy procurement.

Design Features

Standard Hex Drives: Internal drives range from 1.5 mm to 4.0 mm based on standard metric thread pitches, supporting high-torque tightening without socket stripping.

Thread Engagement: Coarse metric thread profiles maximize pull-out resistance when mounted into cast iron, structural steel, or aluminum plates.

Streamlined Force Ratings (N):

Light Load: 2 N (initial) to 20 N (final compression)

Heavy Load: 5 N (initial) to 50 N (final compression)

Machined Lead Chamfers: De-burred thread entries provide smooth installation into tapped holes, eliminating thread-jamming risks on automated assembly lines.