Replacement Nut SKU: 50B143 Category: SOLDERING IRONS Description Description Replacement Nut for 50B125 & 50B140 Related products SKU #: 50B040 Read moreSOLDERING IRONS40W Soldering Iron SKU #: 50B140 Read moreSOLDERING IRONS40W Professional Soldering Iron SKU #: 50B142 Read moreSOLDERING IRONSReplacement Tip