SIST EN 26157-1:1996 PDF

Name: SIST EN 26157-1:1996 — Fasteners - Surface discontinuities - Part 1: Bolts, screws and studs for general requirements (ISO 6157-1:1988)
SKU: SIST EN 26157-1:1996
Price: 60.09 EUR
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Fasteners - Surface discontinuities - Part 1: Bolts, screws and studs for general requirements (ISO 6157-1:1988)

Название (английский):

SIST EN 26157-1:1996

Fasteners - Surface discontinuities - Part 1: Bolts, screws and studs for general requirements (ISO 6157-1:1988)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 13
Дата публикации:: 1 апреля 1996 г.
ICS:: 21.060.10
Технический комитет:: ISEL - Mechanical elements

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Описание (английский):

Establishes limits for various types of products and applies also to these products with: nominal thread diameters of 5 mm and larger, product grades A und B, property classes up to and including 10.9; the annex contains a sampling plan.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

EN 26157-1:1991 - Fasteners - Surface discontinuities - Part 1: Bolts, screws and studs for general requirements (ISO 6157-1:1988) is a CEN standard that establishes limits and acceptance criteria for surface discontinuities on common threaded fasteners. The standard applies to bolts, screws and studs with nominal thread diameters of 5 mm and larger, for product grades A and B, and for property classes up to and including 10.9. An annex provides a sampling plan for inspection.

This standard is identical to ISO 6157-1:1988 and has been adopted in national implementations (for example SIST EN 26157-1).

Key topics and technical requirements

Scope and applicability: Defines which fasteners are covered (diameter ≥ 5 mm, grades A/B, property classes ≤ 10.9).

Types of surface discontinuities: Describes categories of surface defects that can affect performance and appearance (e.g., laps, cracks, seams, tears) - the standard sets limits for such discontinuities.

Acceptance criteria: Establishes limits and criteria for when a fastener is acceptable, conditionally acceptable, or rejected due to surface discontinuities.

Sampling plan: Annex includes a sampling procedure to determine lot conformity without inspecting every item, enabling statistically based quality control.

Reference to ISO series: Aligned with ISO 6157-1:1988, enabling harmonized inspection and procurement across international markets.

(Note: EN 26157-1 sets the framework and acceptance limits rather than prescriptive manufacturing steps. For detailed inspection techniques or measurement procedures, refer to complementary documents or inspection standards.)

Applications

Quality control and acceptance testing in fastener manufacturing lines.

Incoming inspection criteria for suppliers and procurement teams in automotive, construction, machinery and general engineering.

Defining contractual acceptance criteria in purchase orders and specifications to ensure consistent product quality.

Guiding inspection plans for third-party auditors and certification bodies.

Useful for design engineers and maintenance teams who need assurance that fasteners meet surface integrity requirements to avoid fatigue or corrosion initiation.

Related standards

ISO 6157-1:1988 (identical content)

Other parts of the ISO 6157 series and national adoptions (for full series context and related defect classification)

Keywords: EN 26157-1:1991, fasteners, surface discontinuities, bolts screws studs, ISO 6157-1, sampling plan, nominal thread diameter 5 mm, product grades A B, property class 10.9, CEN.

SIST EN 26157-1:1996 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications

Who uses this standard

Related standards

Технические детали

EN 26157-1:1991

Fasteners - Surface discontinuities - Part 1: Bolts, screws and studs for general requirements (ISO 6157-1:19…

ISO 6157-1:1988

Fasteners — Surface discontinuities — Part 1: Bolts, screws and studs for general requirements

SIST EN ISO 6157-2:2004

Fasteners - Surface discontinuities - Part 2: Nuts (ISO 6157-2:1995)