ISO 3895:1986 PDF

Name: ISO 3895:1986 — Road vehicles — Screened and waterproof spark-plug and its connection — Type 2
SKU: ISO 3895:1986
Price: 25 EUR
Availability: InStock

Road vehicles — Screened and waterproof spark-plug and its connection — Type 2

Название (английский):

ISO 3895:1986

Road vehicles — Screened and waterproof spark-plug and its connection — Type 2

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 3
Дата публикации:: 20 марта 1986 г.
Издание:: ISO IS 3895 edition 3 version 1
ICS:: 43.060.50

Тип поставки:

Full version45 €Read online 24h10 €Read online 72h15 €

Язык документа:

ruen

Срок поставки:1 раб. дн. (перевод)

Цена:45 €

Описание (английский):

Specifies the essential dimensional characteristics of a spark-plug type used with spark ignition engines. Tabulates major, pitch, and minor diameters for plug thread and connector thread. A figure illustrates shapes and reference quantities of concern. This third edition cancels and replaces the second edition (1979).

Abstract

Overview

Key Topics

Scope and purpose: Defines dimensional requirements for Type 2 screened, waterproof spark-plugs and their connections so they can be mounted reliably in compatible cylinder heads.
Thread dimensions: Tabulates limit dimensions for plug threads (M18 x 1.5) and connector threads (3/4-20 UNEF-3). The standard references ISO 261, ISO 965/1 and ISO 965/3 for metric thread principles and tolerances.
Tolerance classes: Specifies tolerance classes for the M18 x 1.5 plug thread and corresponding tapped holes - e.g. 6e for plugs and 6H for threaded holes in the cylinder head.
Connector features: The connector for the spark-plug is specified with a 3/4-20 UNEF-3B thread and hexagon flats of 22.2 mm (with angle dimension 24.6 mm min). Requirements emphasize good water sealing, reliable electrical contact and effective radio-frequency shielding.
Assembly considerations: The document notes joint thickness requirements after tightening (torque example: 48 N·m) and specifies how joint thickness should correspond to the dimensional table value C. It also details usable thread length minima and surface finish notes shown in the accompanying figure.

Applications

Ensuring interchangeability of spark-plugs across vehicles and engine designs by standardizing thread and connector geometry.
Guiding engine designers and cylinder-head manufacturers to provide compatible tapped holes and prevent thread seizure or leakage.
Helping spark-plug and connector manufacturers meet dimensional and sealing requirements to ensure proper electrical contact and radio-frequency shielding in road vehicles.

Related Standards

ISO 66 - Basic profile for general-purpose ISO threads
ISO 261 - Metric threads - general plan
ISO 965/1 and ISO 965/3 - Metric thread tolerances and classes
ISO 3412 - Road vehicles - screened and waterproof spark-plug - Type 7
ISO 3896 - Road vehicles - screened and waterproof spark-plug - Type 3

For designers and quality engineers, ISO 3895:1986 provides the dimensional baseline needed to guarantee fit, sealing and reliable ignition performance for Type 2 screened, waterproof spark-plugs.

Технические детали

Технический комитет: ISO/TC 22/SC 32 - Electrical and electronic components and general system aspects
SKU: ISO 3895:1986

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ISO 3895:1986 PDF

Abstract

Overview

Похожие стандарты

Key Topics

Applications

Related Standards

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