ISO 3269-2019 pdf free.Fasteners – Acceptance inspection.
This document specifies an inspection procedure to be used by the purchaser where no prior agreement exists.
It also specifies a reference acceptance procedure for acceptance or rejection of an inspection lot, when no agreement can be reached between the purchaser and the supplier, or where conformance to specification is disputed.
It applies to inspection lots of bolts. screws, studs, nuts, pins, washers, rivets and other related fasteners.
This document applies to fasteners not intended for high volume machine assembly, special-purpose applications or specially engineered applications requiring more advanced in-process control and lot traceability.
For in-process control or final inspection by the manufacture and sorting, see ISO 16426.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (Including any amendments) applies.
ISO 1891-4, Fasteners — Vocabulary — Part 4: Control, inspection, delivery, acceptance and quality
ISO 2859-1:1999, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
ISO 3534-2, Statistics — Vocabulary and symbols — Part 2: Applied statistics
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 1891-4, ISO 2859-1 and
ISO 3534-2 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.orgJobp
— I EC Electropedia: available at
3.1 inspection lot quantity of fasteners of the same designation received from the same supplier at the same time and, if available, of the same manufacturing lot number
3.2 characteristic dimensional element, mechanical, physical or functional property or other recognizable product feature for which limits are specified
4 Symbols
For the purposes of this document, the following symbols apply.
Ac acceptance number
Re rejection number
LQ10 limiting quality at 10 % probability of acceptance, in per cent
AQLS acceptance quality limit at 95 % probability of acceptance, in per cent
N lot size
probability of acceptance. in per cent
5 Incoming acceptance inspection procedures for fasteners
5.1 General requirements
The requirements of this document shall apply to fasteners as delivered by the supplier. i.e. without alteration from the as-delivered condition. In case of alteration or further processing performed by the purchaser, the purchaser shall assume responsibility for conformance of all characteristics altered by such processing.
This document applies after receiving the fasteners, before releasing the lot to any subsequent processing.
Inspections according to this document shall be performed in accordance with Tables 1 and 2. In case of non-conformity found during inspection. 2 and/or 6.3 shall apply.
The purchaser shall give the supplier the opportunity to verify any alleged non-conformity prior to any disposition.ISO 3269 pdf free download.