Heavy Hex Nut ASTM A563 DH / Gr.2H

Heavy hex nuts to ASME B18.2.2 in ASTM A563 Grade DH carbon steel, with ASTM A194 2H available for high-temperature service. UNC threads 1/4-20 to 1-1/2-6; hot-dip galvanized nuts are re-tapped after galvanizing for clean bolt run-down.

Standard	ASME B18.2.2 / ASTM A563 DH
Option	ASTM A194 2H heavy hex
Size	1/4-20 – 1-1/2-6 UNC
Finish	Plain, HDG (re-tapped)
Packing	25 kg carton / bulk

• Grade DH for full A325/A490 bolt-strength matching
• Proof-load tested per A563 on production lots
• DH head stamping for inspection traceability

MOQ y plazo según medida y acabado — lote típico 15–30 días tras confirmación. Certificado de material 3.1 disponible.