Malleable cast iron backnut (Recessed)

Category BS / EN standard Malleable cast iron pipe fittings

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

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Product Details

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.

Available size

Size	A (mm)	Ref. No.
1/2″ / DN15 / 21.3mm	7.9	M3303 (UL/FM)
3/4″ / DN20 / 26.9mm	8.6	M3304 (UL/FM)
1″ / DN25 / 33.7mm	9.7	M3305 (UL/FM)
1-1/4″ / DN32 / 42.4mm	10.7	M3306 (UL/FM)
1-1/2″ / DN40 / 48.3mm	11.9	M3307 (UL/FM)
2″ / DN50 / 60.3mm	13.5	M3308 (UL/FM)
4″ / DN100 / 114.3mm	20.3	M3311 (UL/FM)