Replacement Nut SKU: 50B143 Category: SOLDERING IRONS Description DescriptionReplacement Nut for 50B125 & 50B140Related productsSKU #: 50B142 Read moreSOLDERING IRONSReplacement Tip SKU #: 50B125 Read moreSOLDERING IRONS25W Professional Soldering Iron SKU #: 50B140 Read moreSOLDERING IRONS40W Professional Soldering Iron