Bosch 1 928 300 599 Blue Silicone Single Wire Seal (JPT / BDK 2.8)

The Component: Genuine Bosch high-performance single wire seal (SWS). Kompakt 1.a, JPT, and BDK 2.8 Interconnect taxonomy / Individual moisture barrier gland / Premium High-Flexibility Silicone / Multi-Rib Weather-Tight Profile / Wire Insulation Moisture Block / Component Variant Alias: 1-928-300-599 / Global Order Reference: 1928300599 / Bosch Component Class: Single Wire Cavity Seal for 2.8mm Series Waterproof Automotive Connectors / Cross-Industry OEM Reference Numbers: VAG 7E0 972 744 E, Mercedes-Benz A 000 545 28 39, Iveco 500382761, Fiat 10172182, Renault 50 10 306 621.

Applications & Fitment: Engineered as a premium, severe-duty original equipment (OE) specification environmental sealing gland designed explicitly to isolate individual wire insulation entry points from high-pressure moisture, road spray, fluid track dirt, and engine compartment contaminants. This high-visibility blue silicone rubber cavity seal is an absolute wire harness remanufacturing, custom loom assembly, and localized field repair staple across leading international vehicle platforms—most extensively integrated within Volkswagen, Audi, Skoda, Seat, Mercedes-Benz, Iveco, Fiat, and Renault factory automotive electrical networks utilizing Bosch Kompakt 1.a, Junior Power Timer (JPT), and BDK 2.8 sealed connector families. It is standardly deployed across critical exterior, under-hood, and transmission wiring junctions, crimped directly behind the terminal insulation ears for ignition coils, common-rail fuel injectors, camshaft sensors, and heavy-duty chassis-mounted safety runs. It features a precision-molded triple-outer-rib geometry that exerts continuous, stable compression against the internal plastic cavity walls of the connector housing block, creating a resilient, low-tolerance waterproof barrier (IP6K9K-rated) that stands up to severe multi-axis vibration, continuous engine thermal cycling, and heavy vehicle washdowns. Engineered to conform to rigid tier-1 automotive manufacturing and environmental isolation standards, its pliable inner bore slides tightly over standard automotive thin-wall insulation boundaries, preventing moisture tracking down the copper strands and entirely eliminating wire corrosion over continuous service lifetimes. Highly critical service item for auto-electrical workshops, marine electronic installers, motorsport loom builders, and diagnostic technicians who must replace compromised, heat-aged, or oil-soaked seals whenever pins are extracted during harness rebuilding.

Technical Attributes:

- Manufacturer Part Number: 1 928 300 599 / 1928300599 (Brand: Bosch / Germany Genuine Component Class)

- Product Series Taxonomy: Kompakt 1.a, JPT 2.8, BDK 2.8, and BSK 2.8 Automotive Interconnect Families

- Component Type: Single Wire Seal (SWS) / Cavity Moisture Blocking Gland

- Target System Tab Sizing: Engineered for 2.8mm nominal blade width contact systems

- Base Material Compound: Premium High-Grade Silicone Rubber providing exceptional ozone stability, high tear resistance, fluid stabilization, and robust fuel/oil misting deflection

- Color Profile: Factory Standard High-Visibility Blue finish for swift sizing identification and optical inspection confirmation inside the harness entry paths

- Wire Insulation Range Capacity: Precision optimized to seal securely against standard automotive thin-wall low-voltage cables (such as FLRY-B profiles) featuring an overall outer insulation diameter from 1.20mm minimum up to 2.10mm maximum

- Compatible Conductor Cross-Sections: Ideally paired with core wire sizes ranging from 0.35mm² up to 1.00mm² (approx. 22 AWG to 16 AWG core runs depending on overall outer insulation diameter)

- Housing Matrix Integration: Tailored to fit tightly inside the rear terminal entry channels of standard Bosch Kompakt 1.a series sealed housings (including common block part numbers like 1 928 403 874, 1 928 403 698, and 1 928 403 968)

- Target Terminal System Compatibility: Certified for direct crimping co-assembly onto matching 2.8mm series contacts, including Junior Power Timer female sockets and Bosch BDK/BSK open-barrel crimp terminal systems

- Environmental Sealing Level: Complete splashproof, dustproof, and high-pressure washdown isolation up to IP6K9K when properly seated alongside matched housing and terminal sub-assemblies

- Operational Thermal Window: Severe-duty engine block, chassis route, and wheel-well layout certified to maintain material elasticity and sealing compliance across a harsh performance spectrum from -40°C up to +130°C

- Assembly Recommendation: Must be loaded onto the wire insulation *prior* to strip and terminal crimp operations; requires appropriate F-crimp profile insulation jaws on an automotive open-barrel crimp tool to roll the terminal ear neatly over the seal neck without piercing the silicone mantle

- Commercial Access: Available as loose individual pieces for immediate field repair, convenient trade-pack workshop refill boxes, or bulk volume master production runs. Tiered B2B wholesale trade volume pricing breaks apply instantly inside your basket for independent garages, loom remanufacturers, and trade auto-electrical stockists.