Overview
EN ISO 9100-7:2005 - "Glass containers - Vacuum lug finishes - Part 7: 58 deep" is a CEN-endorsed ISO standard that specifies the dimensional and design requirements for a 58 mm deep vacuum lug finish used on wide-mouth glass containers (jars and pots). The standard defines the finish geometry, thread construction and key functional requirements needed to ensure reliable vacuum sealing and mechanical compatibility with closures.
Key topics and requirements
- Scope and drawings: Dimensions and profiles are provided in Figures 1–3 and summarized in Table 1. The standard covers the finish geometry (cutter profile), thread construction, and the closure position envelope.
- Nominal size: The standard applies to a vacuum lug finish with a nominal depth of 58 mm for wide-mouth glass containers.
- Thread and closure parameters: Thread form, pitch, leads and threads-per-inch are specified so caps engage and cam off correctly; the theoretical cam-off point must lie on the upper flank of the thread to ensure proper cap removal.
- Sealing surface quality: The sealing area shall be free of defects (no checks, dips, crizzles or other flaws) that could impair vacuum sealing.
- Form tolerances and concentricity: Ovality of finish diameters should be minimized. Diameters identified as E and T are required to be concentric with one another for reliable closure fit and vacuum integrity.
- Optional details and tolerances: Details not explicitly specified may be adapted for the application; general linear and angular tolerances are to follow EN 22768-1 (ISO 2768-1).
- Manufacturing considerations: Cutter inclination (α-angle) and cut-in profiles are defined; the contour below the H dimension and any bead design are optional but must allow necessary clearance for the closure.
Applications and users
- Who uses it: Glass container manufacturers, mould/tool designers, packaging engineers, closure and cap manufacturers, and quality assurance teams in food, beverage and pharmaceutical packaging.
- Practical uses:
- Ensuring interchangeability and correct fit between jars/pots and vacuum lug caps.
- Designing moulds and cutter profiles for blow-and-blow or press-and-blow production of wide-mouth containers.
- Specifying inspection criteria for sealing surfaces, concentricity and thread geometry in quality control.
- Supporting packaging development where vacuum sealing integrity and reliable cap removal are critical (e.g., preserves, baby food, sterilized products).
Related standards
- EN 22768-1 (ISO 2768-1) - general tolerances for dimensions without individual tolerance indications.
- CETIE data sheet GME 20-05:1995 - referenced background data used in development.
Keywords: EN ISO 9100-7:2005, vacuum lug finish, 58 deep, glass containers, wide-mouth jars, thread parameters, sealing surface, cutter profile, packaging standard.