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boeray 4pcs 1/4" NPT Male Thread to 1/4" NPT Male Thread Brass Pipe Hose Fitting Straight Hex Nipple Fast Coupler Adapter - Amazon.com
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Parker - Industrial Pipe Adapter: 1/4″ Female Thread, 7/8-14 Male Thread, Male Straight Thread O-Ring x Female NPTF - 09107947 - MSC Industrial Supply
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4HMK4S Parker | Parker Hydraulic Straight Threaded Adaptor G 1/4 Male to G 1 /4 Male, 4HMK4S | 807-564 | RS Components
![Amazon.com: KOOTANS Forged Brass Reducing Hex Nipple, 1/4'' NPT Male x 1/8'' NPT Male Thread Adapter Brass Pipe Fitting Connector Couplings (Pack of 4) : Industrial & Scientific Amazon.com: KOOTANS Forged Brass Reducing Hex Nipple, 1/4'' NPT Male x 1/8'' NPT Male Thread Adapter Brass Pipe Fitting Connector Couplings (Pack of 4) : Industrial & Scientific](https://m.media-amazon.com/images/I/7174j45bu-L.jpg)
Amazon.com: KOOTANS Forged Brass Reducing Hex Nipple, 1/4'' NPT Male x 1/8'' NPT Male Thread Adapter Brass Pipe Fitting Connector Couplings (Pack of 4) : Industrial & Scientific
![Milwaukee SHOCKWAVE Impact Duty 1/4 in. x 1/4 in. Alloy Steel Square Socket Adapter 48-32-5030 - The Home Depot Milwaukee SHOCKWAVE Impact Duty 1/4 in. x 1/4 in. Alloy Steel Square Socket Adapter 48-32-5030 - The Home Depot](https://images.thdstatic.com/productImages/43f76e9a-1ddc-4943-acd5-0fc671502a1f/svn/milwaukee-bit-holders-extensions-48-32-5030-64_1000.jpg)