Hole Plugs

Image Part Number Description / PDF Quantity Rfq
NPPA-M16G

NPPA-M16G

FRÄENKISCHE USA, LP

FIPLOCK, SCREW PLUG, M16X1.5, GR

0

NPPA-M12G

NPPA-M12G

FRÄENKISCHE USA, LP

FIPLOCK, SCREW PLUG, M12X1.5, GR

0

NPPA-P09G

NPPA-P09G

FRÄENKISCHE USA, LP

FIPLOCK, SCREW PLUG, PG09, GREY

0

NPPA-P07G

NPPA-P07G

FRÄENKISCHE USA, LP

FIPLOCK, SCREW PLUG, PG07, GREY

0

NPPA-M25G

NPPA-M25G

FRÄENKISCHE USA, LP

FIPLOCK, SCREW PLUG, M25X1.5, GR

0

NPPA-P16G

NPPA-P16G

FRÄENKISCHE USA, LP

FIPLOCK, SCREW PLUG, PG16, GREY

0

NPPA-M50G

NPPA-M50G

FRÄENKISCHE USA, LP

FIPLOCK, SCREW PLUG, M50X1.5, GR

0

NPPA-P36G

NPPA-P36G

FRÄENKISCHE USA, LP

FIPLOCK, SCREW PLUG, PG36, GREY

0

NPPA-P48G

NPPA-P48G

FRÄENKISCHE USA, LP

FIPLOCK, SCREW PLUG, PG48, GREY

0

NPPA-M32G

NPPA-M32G

FRÄENKISCHE USA, LP

FIPLOCK, SCREW PLUG, M32X1.5, GR

0

NPPA-P21G

NPPA-P21G

FRÄENKISCHE USA, LP

FIPLOCK, SCREW PLUG, PG21, GREY

0

NPPA-M40G

NPPA-M40G

FRÄENKISCHE USA, LP

FIPLOCK, SCREW PLUG, M40X1.5, GR

0

NPPA-P29G

NPPA-P29G

FRÄENKISCHE USA, LP

FIPLOCK, SCREW PLUG, PG29, GREY

0

NPPA-P11G

NPPA-P11G

FRÄENKISCHE USA, LP

FIPLOCK, SCREW PLUG, PG11, GREY

0

NPPA-P13G

NPPA-P13G

FRÄENKISCHE USA, LP

FIPLOCK, SCREW PLUG, PG13, GREY

0

NPPA-M20G

NPPA-M20G

FRÄENKISCHE USA, LP

FIPLOCK, SCREW PLUG, M20X1.5, GR

0

NPPA-M63G

NPPA-M63G

FRÄENKISCHE USA, LP

FIPLOCK, SCREW PLUG, M63X1.5, GR

0

Hole Plugs

1. Overview

Hole plugs (also known as blanking plugs or hole covers) are mechanical fasteners designed to seal, protect, or provide structural integrity to openings in various materials. They play a critical role in preventing fluid leakage, dust ingress, vibration damping, and maintaining aesthetic finishes in industrial and consumer applications.

2. Main Types and Functional Classification

TypeFunctional FeaturesApplication Examples
Expansion PlugsExpand radially to grip hole wallsAutomotive frame sealing
Threaded PlugsMechanical screw-in retentionHydraulic system ports
Elastomeric PlugsFlexible rubber compression sealElectrical conduit protection
Quick-Release PlugsTool-free installation/removalAerospace panel access

3. Structure and Components

Typical hole plug assemblies consist of: - Body: Cylindrical or tapered base (metal/plastic/rubber) - Retention Features: Threads, barbs, or expanding segments - Sealing Interface: O-ring, lip seal, or compressive material - Head Style: Flush, protruding, or recessed for tool engagement

4. Key Technical Parameters

ParameterSignificance
Material CompatibilityCorrosion resistance and chemical exposure
Size RangeMetric/Imperial diameter specifications
Temperature ResistanceOperating range (-40 C to +150 C typical)
Insertion ForceInstallation effort requirements
Retention Strength50-500N pull-out resistance

5. Application Fields

Key industries include: - Automotive (engine bay sealing) - Electronics (panel cutout protection) - Construction (concrete formwork plugs) - Medical equipment (sterile barrier systems) - Marine (hull penetration sealing)

6. Leading Manufacturers

ManufacturerRepresentative Product
3MScotch-Weld Plastic Welding Kits
Saint-GobainCalvasil silicone sealing plugs
Illinois Tool WorksBossard elastic retention plugs
RoxtecMultidiameter cable transit seals

7. Selection Guidelines

Consider: - Environmental exposure (UV, chemicals) - Required IP rating (IP54/IP67) - Installation frequency - Substrate material (metal, plastic, composite) Case Study: Automotive manufacturers use nylon expansion plugs (PA66) with integrated gaskets for wheel well openings, providing IP68 protection while reducing assembly time by 30%.

8. Industry Trends

Emerging developments: - Lightweight composite materials - Integrated smart sensors for seal integrity monitoring - Biodegradable polymer solutions - 3D-printed custom geometries - Anti-vibration designs for EV battery enclosures

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