← The evidence ledger
Evidence row 2201634
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://machining-calc.x402tookit.com/bolt-torque
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 34b9a04592c3c1b46bc546e04750056942523d88ed801d461c5e1cc87cc77fb6
- Leaf
- 0x307eb22567030f7fe728aecc790d307dffd9b3344f8beb46f91305c6745c9efc
What was observed
{
"endpoints": [
[
"x402",
"https://machining-calc.x402tookit.com/bolt-torque"
]
],
"name": "Machining & Fasteners Calc",
"owner_address": "0xb531320805c5bed1d46aeadcf4f008fdf172dbda",
"raw": {
"accepts": [
{
"amount": "20000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
"transactionVersions": [
0
]
},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:137",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:42161",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
}
],
"description": "Bolt preload (75 percent of proof) and tightening torque estimate T = K F d for ISO property classes 8.8, 10.9, 12.9.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"diameter": 10,
"propertyClass": "8.8"
},
"type": "http"
},
"output": {
"example": {
"asOf": "2026-10-12T22:56:15.798Z",
"degraded": false,
"diameterMm": 10,
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"notChecked": [
"the real friction of your threads and bearing surfaces (K varies widely)",
"joint stiffness, gasket creep and embedment loss",
"…2 more"
],
"nutFactor": 0.2,
"pitchMm": 1.5,
"preloadFraction": 0.75,
"preloadKN": 25.225,
"proofLoadKN": 33.634,
"proofStressMPa": 580,
"propertyClass": "8.8",
"reasons": [
"Preload = fraction x proof stress x stress area.",
"Torque = K x preload x nominal diameter. K is the biggest uncertainty (+/- 25 percent is normal)."
],
"source": "computed locally: ISO 898-1 proof stress, stress area, preload = fraction x proof stress x As, torque T = K x F x d",
"stressAreaMm2": 57.99,
"summary": "M10x1.5 class 8.8: preload 25.23 kN, torque about 50.5 N m (K 0.2).",
"torqueLbfFt": 37.21,
"torqueNm": 50.45,
"verdict": "COMPUTED"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"diameter": {
"description": "Nominal diameter in mm, 3 to 48",
"type": "number"
},
"nutFactor": {
"description": "Nut factor K, 0.08 to 0.4 (default 0.2: dry steel; about 0.15 lightly oiled)",
"type": "number"
},
"pitch": {
"description": "Pitch in mm; omit for the ISO coarse pitch of M3 to M24",
"type": "number"
},
"preloadFraction": {
"description": "Fraction of proof load to preload to, 0.3 to 0.9 (default 0.75)",
"type": "number"
},
"propertyClass": {
"description": "8.8, 10.9 or 12.9",
"type": "string"
}
},
"required": [
"diameter",
"propertyClass"
],
"type": "object"
},
"type": {
"const": "http",
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},
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"output": {
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},
"degraded": {
"type": [
"boolean",
"null"
]
},
"diameterMm": {
"type": [
"null",
"number"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"nutFactor": {
"type": [
"null",
"number"
]
},
"pitchMm": {
"type": [
"null",
"number"
]
},
"preloadFraction": {
"type": [
"null",
"number"
]
},
"preloadKN": {
"type": [
"null",
"number"
]
},
"proofLoadKN": {
"type": [
"null",
"number"
]
},
"proofStressMPa": {
"type": [
"null",
"number"
]
},
"propertyClass": {
"type": [
"null",
"string"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"source": {
"type": [
"null",
"string"
]
},
"stressAreaMm2": {
"type": [
"null",
"number"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"torqueLbfFt": {
"type": [
"null",
"number"
]
},
"torqueNm": {
"type": [
"null",
"number"
]
},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-01T23:35:17.934Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-11-01T23:35:17.695Z"
},
"resource": "https://machining-calc.x402tookit.com/bolt-torque",
"serviceName": "Machining & Fasteners Calc",
"tags": [
"fasteners",
"torque",
"bolts",
"preload"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Bolt preload (75 percent of proof) and tightening torque estimate T = K F d for ISO property classes 8.8, 10.9, 12.9."
}What the leaf hashes
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Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (444186 rows).
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- 0x372ce86b8fcb89985c2b3857c69bf0a3b4ac4b02c7e528ae13cc27ab0fb42f23
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- 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e
- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af