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41-1307 Rubber Port Plug – 5 Pack – Compatible with Delco 10SI 12SI 21SI 22SI 27SI IR/EF Alternators – Replaces Delco 1987869, J&N 180-12115 – 1 Wire Regulator Block-Off Caps in Kuwait 41-1307 Rubber Port Plug – 5 Pack – Compatible with Delco 10SI 12SI 21SI 22SI 27SI IR/EF Alternators – Replaces Delco 1987869, J&N 180-12115 – 1 Wire Regulator Block-Off Caps in Kuwait

41-1307 Rubber Port Plug – 5 Pack – Compatible with Delco 10SI 12SI 21SI 22SI 27SI IR/EF Alternators – Replaces Delco 1987869, J&N 180-12115 – 1 Wire Regulator Block-Off Caps

KWD 6.500
Brand
STS Parts
Weight
57 g
– 1 +

Special Features

  • 🔵 Premium Rubber Cap Set (5 Pack) – Includes five 41-1307 port plugs designed to seal the regulator opening on 1-wire Delco alternators. Durable, flexible rubber ensures a secure weather-tight fit.
  • 🟢 Compatible With Delco 10SI, 12SI, 21SI, 22SI, 27SI Alternators – Works with Type 200 and Type 202 Series IR/EF alternators across many applications including Agco, Case, Caterpillar, CNH, Ford, Hino, and more.
  • 🟡 Replaces OEM Part Numbers – Interchanges with Delco 1987869 and J&N 180-12115; fits many factory and aftermarket alternators used in heavy-duty, agricultural, and industrial equipment.
  • 🔴 Easy Installation – Simply press into the regulator port opening to protect internal components from dust, oil, and moisture intrusion. No tools or adhesives required.
  • 🟣 High-Quality Aftermarket Product – 100% new, precision-molded rubber plugs manufactured to meet or exceed OEM sealing performance.

Description

The STS Parts 41-1307 Rubber Port Plug (5-Pack) is designed for blocking or sealing the regulator port on 1-wire alternators, preventing dust, oil, or debris from entering the housing. These are direct-fit rubber caps made to OEM standards, providing a snug and long-lasting seal. This 5-piece pack replaces Delco 1987869 and J&N 180-12115, and fits Delco 10SI, 12SI, 21SI, 22SI, and 27SI / Type 200–202 IR/EF alternators. Perfect for rebuilders, electrical shops, and mechanics converting 3-wire alternators to 1-wire operation. Specifications Part Type: Rubber Port Plug Item Number: 41-1307 Material: Rubber Fits: Delco 10SI / 12SI / 21SI / 22SI / 27SI IR/EF Alternators Replaces: Delco 1987869, J&N 180-12115 Quantity: 5-Pack Condition: New Aftermarket Used On: 1-Wire Regulator Applications Note: Designed for regulators with webbed terminals Cross References (Partial List) Delco 1987869 J&N 180-12115 Agco 71370306 Case 104256A1 Caterpillar 107-7977 Cummins 3603851RX Ford 4C4O-10300-CA Hino 27040-2530 AT142246 Komatsu 1307203H1 and others

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