Malleable cast iron backnut (Recessed)
- Certificate: UL Listed / FM Approved
- Standard: ISO 49 / EN 10242, symbol C
- Material: BS EN 1562, EN-GJMB-350-10
- Type: Recessed
- Thread: BSPP (G) as ISO 228-1
- W. pressure: 20 ~ 25 bar, ≤PN25
- Surface: Black iron / hot dip galvanized
Malleable cast iron backnut (Recessed) is hexagonal nuts with female threaded connection, and it is used to tighten nipple or other pipe joint, so to avoid slippage.