<h2>Overview</h2>
<p>The Foster 210-3103 automatic socket is a quick-disconnect fitting designed for pneumatic and hydraulic systems requiring secure, reusable connections. Part of the Foster 210 series, this 1/4″ MPT (male pipe thread) socket delivers reliable one-way shut-off performance and interchanges directly with ARO 210 series plugs. This lot includes four units, providing multiple connection points or spare inventory for mission-critical applications.</p>
<h2>Key Features</h2>
<ul>
<li>Automatic push-to-connect and retract-to-disconnect operation</li>
<li>One-way shut-off valve prevents fluid loss on disconnect</li>
<li>ARO 210 series plug compatibility for standard industrial interchange</li>
<li>Brass and steel construction for durability in demanding environments</li>
<li>Stainless steel locking pins for long service life</li>
<li>Rated 300 psig operating pressure with temperature range -40° to +250°F</li>
</ul>
<h2>Technical Specifications</h2>
<ul>
<li><strong>Part Number:</strong> 210-3103</li>
<li><strong>Manufacturer:</strong> Foster Manufacturing (ZSi-Foster)</li>
<li><strong>Series:</strong> 210</li>
<li><strong>Body Size:</strong> 1/4″ (socket)</li>
<li><strong>Thread Connection:</strong> 1/4″ MPT (male pipe thread)</li>
<li><strong>Materials:</strong> Brass body, steel valve, stainless steel pins</li>
<li><strong>Operation:</strong> Automatic (push-to-connect, retract sleeve to disconnect)</li>
<li><strong>Rated Pressure:</strong> 300 psig</li>
<li><strong>Operating Temperature Range:</strong> -40°F to +250°F</li>
<li><strong>Valve Function:</strong> One-way shut-off</li>
<li><strong>Locking Device:</strong> Stainless steel pins</li>
<li><strong>Quantity:</strong> 4 units per lot</li>
<li><strong>Country of Origin:</strong> United States</li>
</ul>
<h2>Typical Applications</h2>
<ul>
<li>Pneumatic tool and equipment coupling in manufacturing and assembly lines</li>
<li>Hydraulic system connections in mobile and stationary equipment</li>
<li>Compressed air distribution and control systems</li>
<li>Pump and compressor inlet/outlet connections</li>
<li>Multi-station rapid connect/disconnect applications</li>
<li>Maintenance, retrofit, and replacement installations requiring ARO interchange compatibility</li>
</ul>
<h2>Compatibility & Replacements</h2>
<h3>Compatible With</h3>
<ul>
<li>ARO 210 series plugs and couplers</li>
<li>Pneumatic systems rated 300 psig and below</li>
<li>Hydraulic systems rated 300 psig and below</li>
<li>Standard 1/4″ MPT male threaded ports</li>
<li>Industrial quick-disconnect ecosystems requiring 1/4″ body size sockets</li>
</ul>
<h3>Replaces / Drop-In Replacement For</h3>
<ul>
<li>ARO 210-3103 (direct interchange)</li>
<li>Original Foster 210-3103 units requiring refurbishment or stock replenishment</li>
</ul>
<h3>Works With</h3>
<ul>
<li>Foster 210 series plugs (210-10, 210-12, 210-16, 210-17, etc.)</li>
<li>ARO 210 series plugs and couplers</li>
<li>Standard industrial pneumatic hose and tube fittings</li>
<li>Manual and automatic coupling systems</li>
<li>Both rigid and flexible line applications</li>
</ul>
