Brass Unions
Brass unions for tube and pipe: compression, flare, push-to-connect, bulkhead and threaded sleeve unions.
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MAF/USA LF COMP Union — MAF/USA Brass Fittings
Regular price From $4.10 USDRegular priceUnit price / perSale price From $4.10 USDSold out -
MAF/USA Lead Free Union — MAF/USA Brass Fittings
Regular price From $24.16 USDRegular priceUnit price / perSale price From $24.16 USDSold out -
MAF/USA INV Unions — MAF/USA Brass Fittings
Regular price From $2.27 USDRegular priceUnit price / perSale price From $2.27 USD -
MAF/USA COMP Union — MAF/USA Brass Fittings
Regular price From $0.97 USDRegular priceUnit price / perSale price From $0.97 USD -
MAF/USA Flare Unions — MAF/USA Brass Fittings
Regular price From $1.89 USDRegular priceUnit price / perSale price From $1.89 USD -
NAB Bulkhead Unions — MAF/USA Brass Fittings
Regular price From $9.57 USDRegular priceUnit price / perSale price From $9.57 USD -
MAF/USA Precision Grip Fittings - Double End Unions — MAF/USA Brass Fittings
Regular price From $6.86 USDRegular priceUnit price / perSale price From $6.86 USD -
Hose End - Menders — MAF/USA Brass Fittings
Regular price From $7.25 USDRegular priceUnit price / perSale price From $7.25 USD -
Sold outNAB Unions — MAF/USA Brass Fittings
Regular price $17.96 USDRegular priceUnit price / perSale price $17.96 USDSold out -
FIP X FIP Union — Lead Free Fittings
Regular price From $3.45 USDRegular priceUnit price / perSale price From $3.45 USD -
Flare Union — Lead Free Fittings
Regular price From $0.35 USDRegular priceUnit price / perSale price From $0.35 USD -
Unions & Reducers — Lead Free Fittings
Regular price From $0.84 USDRegular priceUnit price / perSale price From $0.84 USD -
Bulkhead Tube Union — Brass Fittings
Regular price From $44.03 USDRegular priceUnit price / perSale price From $44.03 USD -
Straight Tube Union — Brass Fittings
Regular price From $7.49 USDRegular priceUnit price / perSale price From $7.49 USD -
Inverted Unions — Brass Fittings
Regular price From $0.62 USDRegular priceUnit price / perSale price From $0.62 USD -
Hyd Union for Imported Vehicles — Brass Fittings
Regular price From $4.68 USDRegular priceUnit price / perSale price From $4.68 USD -
Ballseat Union — Brass Fittings
Regular price From $3.01 USDRegular priceUnit price / perSale price From $3.01 USD -
Compression Union — Brass Fittings
Regular price From $0.53 USDRegular priceUnit price / perSale price From $0.53 USD -
Reducing Union — Brass Fittings
Regular price From $2.31 USDRegular priceUnit price / perSale price From $2.31 USD -
Captive Sleeve Compression Unions — Brass Fittings
Regular price From $2.41 USDRegular priceUnit price / perSale price From $2.41 USD -
Tank Unions, Drilled Thru — Brass Fittings
Regular price From $3.76 USDRegular priceUnit price / perSale price From $3.76 USD -
Compression — Bulkhead Union
Regular price From $6.48 USDRegular priceUnit price / perSale price From $6.48 USD -
Flareless — Bulkhead Union
Regular price From $1.15 USDRegular priceUnit price / perSale price From $1.15 USD -
C/P Union — Nipples and Fittings
Regular price From $8.44 USDRegular priceUnit price / perSale price From $8.44 USD
Brass unions for tube and pipe connections: compression unions, reducing flare unions, MAF/USA barstock and flare unions, push-to-connect unions in DOT, nickel-plated and metric versions, bulkhead unions, and self-align and threaded sleeve unions.
Each listing groups the stocked part numbers for one style. Choose size and thread on the product page.
Lead-free unions and reducers are listed separately from the standard brass unions.
Compression unions are the largest style, with 29 stocked part numbers, followed by DOT push-to-connect unions and lead-free unions and reducers with 22 each.












