# Hardtop top lock screws (NB1)

Canonical URL: https://miatatorque.com/spec/hardtop-top-lock-screws-nb1/

Applicability: NB 1999–2000 (BP-4W) — 2000 applicability inferred from 1999 factory evidence within the owner-approved NB1 year group.

Confidence: fsm

37–55 in·lb / 4.3–6.2 N·m

Always confirm against your factory manual. Match every restriction and follow all stages and procedure notes. Disputed claims must not be automatically resolved. The complete record below preserves every printed unit, source claim and procedure.

```json
{
  "id": "hardtop-top-lock-screws-nb1",
  "name": "Hardtop top lock screws (NB1)",
  "aliases": [],
  "applies_to": [
    {
      "gen": "NB",
      "years": [
        1999,
        2000
      ],
      "engines": [
        "BP-4W"
      ],
      "note": "2000 applicability inferred from 1999 factory evidence within the owner-approved NB1 year group."
    }
  ],
  "kind": "torque",
  "torque": {
    "nm": [
      4.3,
      6.2
    ],
    "kgfcm": [
      43,
      63
    ],
    "inlb": [
      37,
      55
    ]
  },
  "confidence": "fsm",
  "sources": [
    {
      "source": "fsm-1999",
      "page": "09–16–18",
      "as_printed": "4.3—6.2 N·m {43—63 kgf·cm, 37—55 in·lbf}",
      "verified_years": [
        1999,
        1999
      ],
      "torque": {
        "nm": [
          4.3,
          6.2
        ],
        "kgfcm": [
          43,
          63
        ],
        "inlb": [
          37,
          55
        ]
      },
      "document": {
        "id": "fsm-1999",
        "tier": 1,
        "title": "1999 Mazda MX-5 Miata Workshop Manual",
        "covers": [
          {
            "gen": "NB",
            "years": [
              1999,
              2000
            ],
            "engines": [
              "BP-4W"
            ]
          }
        ],
        "url": "https://www.mellens.net/mazda/Mazda-Miata-1999-2001.pdf"
      }
    }
  ],
  "jobs": [],
  "system": "body",
  "component": "reaudit-1999",
  "componentName": "Additional 1999 factory specifications",
  "sequence_diagrams": [],
  "url": "https://miatatorque.com/spec/hardtop-top-lock-screws-nb1/"
}
```