GOST 427-75 PDF

Full title and description

GOST 427-75 — "Measuring metal rules. Basic parameters and dimensions. Technical requirements" (Russian: «Линейки измерительные металлические. Технические условия»). The standard defines basic parameters, constructional features and mandatory technical requirements for portable metal measuring rules (steel rules) used for linear measurement, marking and control.

Abstract

GOST 427-75 sets dimensional, marking and accuracy requirements for metallic measuring rules with a 1 mm scale division and measurement limits up to 3000 mm. It specifies scale start conditions, end-face and hanging-hole details, marking width and allowable deviations, and distinguishes mandatory clauses from recommended ones. The document has been amended several times and remains the reference technical specification for production and verification of standard metal rules.

General information

• Status: Active / in force (document действует / действует на момент публикации сведений).
• Publication date: Adopted/introduced 01 January 1977 (designated -75 reflecting development year 1975).
• Publisher: Standards Publishing (Gosstandart / Издательство стандартов, USSR).
• ICS / categories: OKС/ICS classification indicated for metrology/length measuring instruments (catalog listings show ОКС 17.040.30).
• Edition / version: Original designation GOST 427-75; document in force since 01.01.1977 with later republications/reissues and recorded amendments (amendments noted: 4/82, 2/86, 12/92; reissue information in 2007 catalog entries).
• Number of pages: 7 pages (standard text / typical commercial PDF length).

Scope

Applies to metallic measuring rules (portable steel rules and similar flat metal linear measures) with a scale division of 1 mm and measurement limits up to 3000 mm. The standard does not apply to specially purposed or non‑standard measuring rules; selected clauses are obligatory while others are recommended, and the standard covers mechanical and marking requirements, dimensional tolerances and certain acceptance/inspection provisions.

Key topics and requirements

• Designation of the scale start: the scale must start from a transverse end face perpendicular to the longitudinal edge of the rule.
• Scale division and range: 1 mm division, available limits typically 150, 300, 500, 1000 mm and up to 3000 mm; minimum additional millimetre graduations beyond the last centimetre mark for shorter rulers.
• Dimensional tolerances: allowable deviations for nominal lengths and distances between graduations are specified (accuracy/tolerance classes and permissible errors).
• Constructional details: requirements for end-face perpendicularity, hole diameter for hanging (minimum sizes by length ranges), presence of a second end face for two‑scale long rules, and recommendations for rounded ends.
• Marking and scale geometry: recommended stroke widths, engraving/printing methods, and contrast/corrosion protection (materials and coatings commonly used are noted in application examples).
• Verification and metrological control: provisions for initial factory verification and subsequent calibration/verification intervals (commercial and national metrology practices reference the standard).

Typical use and users

Manufacturers of precision hand tools and measuring instruments, calibration and verification laboratories, workshop quality-control departments, tool and instrument suppliers, and educational labs use GOST 427-75 as the technical reference when producing, checking or buying metal measuring rules. It is referenced by product catalogs and procurement specifications for steel rules and rulers across industry and trade.

Related standards

GOST 427-75 replaces or supersedes earlier national documents for metal rules (e.g., ГОСТ 427-56 was listed as a predecessor) and is cited by other GOSTs and technical specifications where length-measuring elements or rule references are required. It is listed among normative references in related standards and technical specifications for measuring devices and metalworking tooling.

Keywords

GOST 427-75, metallic measuring rule, steel rule, measuring ruler, linear measure, scale division 1 mm, dimensional tolerances, technical requirements, calibration, ГОСТ.

FAQ

Q: What is this standard?

A: GOST 427-75 is the Soviet / interstate standard that specifies technical requirements, dimensions and basic parameters for metal measuring rules (steel rules) with 1 mm divisions, used for measurement, marking and control.

Q: What does it cover?

A: It covers constructional features (scale start, end faces, hanging-hole sizes), scale divisions and ranges (up to 3000 mm), allowable dimensional deviations, marking requirements and provisions for verification; some clauses are mandatory while others are recommended.

Q: Who typically uses it?

A: Instrument manufacturers, metrology and calibration labs, workshop quality departments, procurement/specification writers and suppliers of measuring tools consult this standard when producing, verifying or purchasing metal rules.

Q: Is it current or superseded?

A: Listings in standards catalogs and commercial libraries indicate GOST 427-75 remains in force (document introduced 01.01.1977) with recorded amendments and republications; catalogs note reissues and removal of time limits in later administrative acts. For formal legal/administrative status always check the national standards registry or official standards publisher for the absolute current status.

Q: Is it part of a series?

A: It belongs to the metrology and measuring instruments family of standards and is cross-referenced by other GOSTs and technical specifications concerning measuring tools and dimensional control; it also replaced an earlier GOST for metal rules.

Q: What are the key keywords?

A: Metal measuring rule, steel rule, ruler, scale 1 mm, dimensional tolerance, calibration, ГОСТ 427-75, technical requirements.