1.1 This standard specifies the acceptance inspection procedure that the purchaser of fastener must follow in order to determine whether a lot of fasteners will be accepted or rejected in cases where no other such procedure was agreed with the supplier at the time the fasteners were ordered. Additional requirements for acceptance may be included in a specific product standard (for example, one on prevailing torque-type nuts). The same procedure is also to be applied in cases where conformance to specification is disputed.
1.2 This standard is applicable to bolts, screws, studs, nuts, pins, washers, blind rivets and other related fasteners not intended for high volume machine assembly, special-purpose applications or specially engineered applications requiring greater in-process control and lot traceability (see the note in the ISO introduction). The procedure for these products shall be agreed upon by the supplier and the purchaser prior to the confirmation of the order.
1.3 This standard is applicable only to fully manufactured products; it neither implies nor includes any particular in-process control procedure or inspection during production.
1.4 The production of accessories, services and partially fabricated parts (for example, washers, nuts, plating, heat treatment and blanks) for use in the manufacture of fasteners may be subcontracted to other suppliers by the fastener supplier. Nevertheless, the supplier of the final, finished product shall be solely responsible for the fastener’s quality.
The requirements of this standard apply only to the condition of fasteners at the time of delivery. Any process carried out after receipt (for example, plating) will invalidate the requirements of this standard.
1.5 Annex B (informative) offers ISO/TC 2 Technical Committee’s guidance to, and an explanation of, the principles upon which this standard is based.
2 Normative references
The following standards contain provision which, through reference in this text, constitute provisions of this standard. At the time of publication, all the editions listed are valid. All standards are subject to revision, and all parties using this standard are encouraged to investigate the possibility of applying the latest editions of the following standards.
GB/T 2828-1987 Sampling procedures and tables for lot-by-lot inspection by attributes (Apply to inspection of successive lots or batches)
GB/T 3098.1-2000 Mechanical properties of fasteners - Bolts, screws and studs (idt ISO 898-1: 1999)
GB/T 3098.2-2000 Mechanical properties of fasteners - Nuts - Coarse thread (idt ISO 898-2: 1992)
GB/T 3098.3-2000 Mechanical properties of fasteners - Set screws (idt ISO 898-5: 1998)
GB/T 3098.4-2000 Mechanical properties of fasteners - Nuts - Coarse thread (idt ISO 898-6: 1994)
GB/T 3098.5-2000 Mechanical properties of fasteners - Tapping screws (idt ISO 2702: 1992)
GB/T 3098.6-2000 Mechanical properties of fasteners - Stainless steel bolts, screws and studs (idt ISO 3506-1: 1997)
GB/T 3098.7-2000 Mechanical properties of fasteners - Thread rolling screws (idt ISO 7085: 1999)
GB/T 3098.9-2002 Mechanical properties of fasteners - Prevailing torque type steel hexagon nuts (idt ISO 2320: 1997)
GB/T 3098.10-1993 Mechanical properties of fasteners - Bolts, screws, studs and nuts made of non-ferrous metals (eqv ISO 8839: 1986)
GB/T 3098.15-2000 Mechanical properties of fasteners - Nuts made of stainless steel (idt ISO 3506-2: 1997)
GB/T 3098.16-2000 Mechanical properties of fasteners - Set screws made of stainless steel (idt ISO 3506-3: 1997)
GB/T 3103.1-2002 Tolerances for fasteners - Bolts, screws and nuts (idt ISO 4759-1: 2000)
GB/T 3103.3-2000 Tolerances for fasteners - Plain washers (idt ISO 4759-3: 2000)
GB/T 3934-1983 Gauges for general purpose screw threads (neq ISO 1502: 1978)
GB/T 5267.1-2002 Fasteners - Electroplated coatings (ISO 4042: 1999, IDT)
GB/T 5267.2-2002 Fasteners - Non-electrolytically applied zinc flake coatings (ISO 10683: 2000, IDT)
GB/T 5280-2002 Tapping screws thread (idt ISO 1478: 1999)
GB/T 5779.1-2000 Fasteners - Surface discontinuities - Bolts, screws and studs for general requirements (idt ISO 6157-1: 1988)
GB/T 5779.2-2000 Fasteners - Surface discontinuities - Nuts (idt ISO 6157-2: 1995)
GB/T 5779.3-2000 Fasteners - Surface discontinuities - Bolts, screws and studs for special requirements (idt ISO 6157-3: 1988)
ISO 3534-2: 1993 Statistics - Vocabulary and symbols - Part 2: Statistical quality control
ISO 8402: 1994 Quality management and quality assurance - Vocabulary
3 Terms and definitions
For the purposes of this standard, the following terms and definitions apply. They are based on the terms and definitions given in ISO 3534-2 and ISO 8402.
3.1
acceptance inspection
procedures such as sampling, gauging, measuring, comparing and testing to determine acceptance or rejection of a lot of fasteners
3.2
supplier
manufacturer, dealer or representative who supplies fasteners
3.3
purchaser
recipient or recipient’s representative who receives fasteners
Note: The purchaser is not necessarily the user of the fasteners.
3.4
inspection lot
definite quantity of fasteners of the same designation, received from the same supplier at the one time
