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Fasteners
All Containers›Shop by use case›Fasteners›The floor›Four conditionsShop all fasteners →
The floor

Four conditions

By Dwight Davis, Founder

On this page15
All four, or the definition does not reach the article.

One, the article type

A metallic screw, nut, bolt or stud having internal or external threads, or a load-indicating washer. Five named kinds and nothing else.

Which excludes the unthreaded

Cotter pins, rivets, staples, brads and finish nails have no thread, and four of them are named articles in this group.

And excludes ordinary washers

Because the definition names a load-indicating washer specifically, which implies the others are out.

Two, the diameter

6 millimetres or greater in metric terms, or a quarter inch or greater in English terms. Nominal diameter, not length.

Three, through-hardening

That is through-hardened, or represented as meeting a consensus standard that calls for through-hardening.

Which has an or in it

So a representation about a standard counts, not only the physical fact. An article represented as meeting such a standard is caught.

Four, grade identification marking

That is grade identification marked, or represented as meeting a consensus standard that requires grade identification marking.

Which has the same or structure

Marked, or represented as meeting a standard that requires marking. Two routes into the condition.

So two of the four conditions can be met by representation

Which means what is said about an article can bring it inside the definition, independently of what it is.

That is the same shape as several spines in this library

The adjacent botanicals property finds a label as an element of a definition, and the cannabis topicals property finds claims deciding which labeling scheme applies.

Here a representation is a route into two conditions

Which makes the catalogue copy part of the analysis, not just the hardware.

And none of it is determined on these pages

Whether any article is a fastener within the definition is a question about that article and what is said about it.

And the marking condition is circular in a useful way

A fastener is one that is grade identification marked, and a grade identification marking is defined separately in the same section. The two definitions depend on each other.

Four conditions, two of them reachable by words

Which is the most useful summary of the definition.

References

15 U.S.C. 5402(6) defines a fastener as "a metallic screw, nut, bolt, or stud having internal or external threads, with a nominal diameter of 6 millimeters or greater, in the case of such items described in metric terms, or 1/4 inch or greater, in the case of such items described in terms of the English system of measurement, or a load-indicating washer, that is through-hardened or represented as meeting a consensus standard that calls for through-hardening, and that is grade identification marked or represented as meeting a consensus standard that requires grade identification marking". These are definitions from the Fastener Quality Act; nothing on these pages describes what the Act requires of anyone or determines whether any article falls within the definition. law.cornell.edu
15 U.S.C. 5402(8) defines a grade identification marking as "any grade-mark or property class symbol appearing on a fastener purporting to indicate that the lot of fasteners conforms to a specific consensus standard, but such term does not include a manufacturer's insignia or part number". law.cornell.edu
Written from 15 U.S.C. 5402 and from the catalog as it stood on 19 October 2026. These are definitions from the Fastener Quality Act and nothing here describes what the Act requires of anyone, the inspection or certification scheme, the exemptions, or which consensus standards are involved. Nothing determines whether any article is a fastener within the definition or whether any quantity is a lot. We publish no lot number, heat number, coil reference or production date anywhere in our data. This shelf is shared identically by nine groups and the sewing notions property enumerates the inventory.