Bolt Torque

{
  "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"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://machining-calc.x402tookit.com/bolt-torque?diameter=10&propertyClass=8.8'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - 'https://machining-calc.x402tookit.com/bolt-torque?diameter=10&propertyClass=8.8' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fmachining-calc.x402tookit.com%2Fbolt-torque
const res = await pay("https://machining-calc.x402tookit.com/bolt-torque?diameter=10&propertyClass=8.8");
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://machining-calc.x402tookit.com/bolt-torque?diameter=10&propertyClass=8.8")
    print(res.status_code, res.text)