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Note: Metric equivalents exist under different standards (e.g., NAS1829M), but the original NAS1829 is inch-based. Because NAS1829 is a certified aerospace part, you cannot buy them at a local hardware store or even from general electronics suppliers like Digi-Key (unless specially stocked).
| Feature | Commercial Standoff | NAS1829 Standoff | | :--- | :--- | :--- | | | Requires threadlocker or lock washer. | Built-in prevailing torque (self-locking). | | Stacking accuracy | Variable height tolerance (±0.010" typical). | Tight military tolerance (±0.005" or better). | | Material | Brass, nylon, or low-grade steel. | Corrosion-resistant steel (CRES) or stainless steel passivated. | | Certification | No traceability. | Full material lot traceability & certification. | nas1829 male-female standoffs
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