nut
Enable an agent to recognise a climbing nut, record its geometry and condition, and assess evidence for its compatibility with a proposed rock placement.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
Researched by: Codex
Bundle → Layer → Finding → Questions Filled
6 bundles · 11 layers · 19 findings · 33 questions
Nut identity and geometry Identify the climbing nut and describe the head that engages the rock.
Kind and variant
Separate the registered kind from named products and inspected pieces.
Climbing nut identification
Record evidence that the object is a passive climbing nut and identify its product variant where possible.
- What features establish that this is a climbing nut rather than a threaded nut, cam or nut tool? definition
- Which markings or records identify its manufacturer, product family and size? provenance
Head shape and size
Describe the dimensions and profiles relevant to crack engagement.
Orientation-specific geometry
Record usable orientations and their dimensions independently; some products explicitly support multiple orientations. [DMM Wallnuts](https://dmmwales.com/products/wallnuts).
- What are the head dimensions and taper profiles in each documented placement orientation? measurement
- Which orientations does the manufacturer describe, and which remain unsupported? boundary
Head-to-connector load path Describe how force passes between the attachment and the nut head.
Head and attachment construction
Record material and assembly details that affect inspection and identification.
Assembly evidence
Distinguish observed construction from manufacturer-confirmed materials and termination details.
- What materials and construction are documented for the head, attachment and termination? provenance
- Which attachment components are integral, and are any replacements explicitly permitted? boundary
Connection interface
Describe the usable attachment opening and its relationship to the connecting equipment.
Attachment compatibility
Record connector fit and attachment routing as properties of a particular configuration.
- What are the attachment opening dimensions and any documented connector restrictions? measurement
- Does the proposed connection introduce interference, edge contact or bending requiring further assessment? action
Crack fit and retention Represent the relationship between a nut, a rock constriction and anticipated loading.
Rock contact
Record the constriction and actual head contact without assuming a nominal size proves fit.
Constriction and bearing
Capture observed fit, contact regions and uncertainties about the supporting rock.
- What constriction, crack dimensions and contact regions are documented for this orientation? measurement
- What observations establish or leave uncertain the condition of the rock supporting the head? provenance
Directional retention
Record how anticipated pulls and movement relate to the observed placement.
Loading and displacement assessment
Keep intended loading, possible displacement and assessment status explicit.
- Which pull directions were considered, and how do they relate to the constriction and extraction path? boundary
- Could anticipated rope or connector movement alter the orientation or dislodge the nut? action
- Who assessed this placement, and what limitations remain in that assessment? provenance
Strength and use evidence Link nut-specific ratings and permitted uses to their supporting documents.
Declared strength
Record ratings at the product-size level.
Size-specific rating
Preserve the rating for the exact size: DMM lists different strengths across its Wallnut range. [DMM Wallnuts](https://dmmwales.com/products/wallnuts).
- What strength in kN is declared for this exact size and configuration? measurement
- What document defines the rating and its test conditions? provenance
- What prevents this declared equipment strength from being treated as a measured capacity of the placement? boundary
Conformity and use limits
Associate instructions, standard editions and use restrictions with the applicable variant.
Documented applicability
Capture applicable standards rather than assigning them universally; DMM lists EN 12270:2013 and UIAA 124 for Wallnuts. [DMM Wallnuts](https://dmmwales.com/products/wallnuts).
- Which standard, issuing body, edition and conformity document apply to this variant? provenance
- What restrictions do its instructions impose on intended use, loading and placement? boundary
Inspection, retrieval and retirement Track the condition of the head and attachment through use and removal.
Head and attachment inspection
Record component-specific observations against documented inspection criteria.
Damage and history review
Record head deformation, wear, corrosion and attachment damage as observations requiring interpretation under the applicable instructions.
- What deformation, cracking, corrosion, wire damage or textile damage is visible, and where? measurement
- What loading, exposure and previous inspection history is known or missing? provenance
- Which manufacturer criteria determine acceptance, quarantine or retirement? action
Retrieval and return to service
Record removal consequences and the evidence supporting subsequent reuse.
Post-retrieval disposition
Treat successful removal and acceptance for reuse as separate recorded outcomes.
- Did retrieval leave the head, wire, textile or termination damaged or uncertain? measurement
- What permitted cleaning, inspection or retirement action follows from the observed condition? action
- Who recorded the return-to-service decision, and which instructions supported it? provenance
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these check these first hold for the sense of nut this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these kinds and varieties hold for the sense of nut this model covers, and on what evidence? provenance
Identifiers and schemes
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these identifiers and schemes hold for the sense of nut this model covers, and on what evidence? provenance
Standards and regulation
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these standards and regulation hold for the sense of nut this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these real-world use hold for the sense of nut this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these typical measurements hold for the sense of nut this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these failure modes and hazards hold for the sense of nut this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these regional variation hold for the sense of nut this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of nut this model covers, and on what evidence? provenance
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.OBJ
What it is Filled
A nut is a fastener with an internal screw thread that engages a mating external thread, commonly on a bolt, stud or threaded rod, to clamp, retain or adjust components.
In scope
- Passive nut heads that lodge in rock constrictions
- Head geometry, size, material and contact surfaces
- Integral wire or textile attachment and its connection to the head
- Placement orientation, retention and intended load direction
- Declared strength, inspection evidence and retirement decisions
Out of scope
- Threaded fastening nuts, edible nuts and musical-instrument nuts
- Spring-loaded camming devices and their trigger mechanisms
- Rock bolts, pitons and permanently installed anchors
- Nut-removal tools as independently modelled equipment
- Complete belay systems, ropes, carabiners and anchor arrangements
- Route descriptions and rock formations except as placement context
Why it exists Filled
Enable an agent to recognise a climbing nut, record its geometry and condition, and assess evidence for its compatibility with a proposed rock placement.
Distinguishing features Filled
- The intended function is removable climbing protection in rock, rather than threaded fastening.
- Retention relies on the head interacting with rock geometry without a spring-loaded cam mechanism.
- A load-bearing attachment connects the lodged head to the climbing protection system.
- The head is placed as a chock rather than installed as a drilled bolt or driven piton.
- The nut is one protection component; identifying it does not establish the adequacy of an entire anchor.
What robots and AI may and may not do Filled
Must not
- Use a nut of lower strength class or wrong thread on a load-bearing joint.
- Reuse locking nuts where the maker says they must be replaced.
- Leave nuts loose or missing on vehicles, machines or structures.
- Mix metals that cause corrosion in critical joints without approval.
Only with a human decision
- Signing off fastenings on structural, lifting or vehicle-critical joints.
May
- Select nuts that match the bolt thread, size and strength class required.
- Tighten nuts to the specified torque and check for loosening on equipment it maintains.
Moral aspects Filled
- A loose or wrong nut can cause a wheel, load or structure to fail.
- Counterfeit fasteners put people at risk.
Who is affected
- Vehicle occupants
- Workers near machines
- Users of structures
Owners Filled
Steward
The owner of the equipment; the maintainer answers for its fastening.
Links to other meta-models Filled
parent
- Q125876332 - registry parent class
- Q2639207 - registry parent class
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.nut-q1774102
- Wikidata: Q1774102 (https://www.wikidata.org/wiki/Q1774102)
Direct properties required Filled
- Head profile: Straight taper, curved taper, offset taper, other documented profile
- Head dimensions by orientation: mm; width, depth and height with orientation identified
- Manufacturer size designation: Brand, product family, size code and colour
- Head and attachment materials: Documented head alloy, wire material or textile composition; unknown
- Declared strength: kN, accompanied by size, configuration and source
- Mass: g per nut
- Attachment construction: Wire loop, textile loop or other documented construction
- Placement relationship: Nut linked to crack, head orientation, contact regions and anticipated pull direction
- Inspection disposition: Unassessed, accepted under documented criteria, quarantined, retired
- Conformity evidence: Product linked to declaration, standard edition, markings and applicable size
Recognition required Filled
- A small block, usually hexagonal, with a threaded hole through the centre.
- Markings for strength class or a nylon insert or flange in locking types.
Capabilities and actions required Filled
- Compare nut geometries and sizes against recorded crack dimensions.
- Retrieve the instructions and strength declaration for an identified variant.
- Document a proposed placement and request competent assessment of its retention.
- Record inspection observations and apply documented quarantine or retirement criteria.
- Compare rack coverage using dimensions, profile, mass and declared strength.
- Record retrieval, subsequent inspection and return-to-service decisions.
Hazards and failure modes required Filled
- Loosening under vibration.
- Thread stripping from wrong size or overtightening.
- Counterfeit or substandard nuts failing under load.
Standards and interfaces required Filled
- ISO 898-2, Mechanical properties of fasteners made of carbon steel and alloy steel, Nuts, issued by the International Organization for Standardization.
Context of use required Filled
- Climbing nuts are passive protection devices used in rock climbing and mountaineering where suitable cracks can support an anchor placement.
- They form part of a protection or anchor system by transferring loads through a shaped metal body into the surrounding rock.
- Their suitability depends on the device geometry, rock condition, placement configuration, and expected direction of loading.
Sources Filled
- Wikidata item Q1774102: nut - identity and sense of the item
- Wikipedia: Nut (climbing) - general description of the item
Open questions
- Does the registry intend this entry to include hexagonal chocks and passive camming forms, or only conventional tapered nuts?
- Which existing Vercy world model, if any, already owns this climbing-protection concept?
- Which manufacturer documents establish the intended-use restrictions and inspection criteria for micro-nuts and other specialised variants?
- How should dimensions and usable orientations be compared across manufacturers whose size codes and published ranges differ?
- What evidence and assessor qualifications are required before a recorded placement assessment can support an operational decision?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q1774102/spec.json