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FA-3961
U.S. Seal MFG. FA-3961 Head Assembly. Size: 3.375", Type K- Equal to John Crane 21 Double. Carbon Primary Ring, Viton Secondary Seals, Stainless Steel Metal Parts & Stainless Steel Springs. See pdf for full OEM Pump Compatibility.
$3,081.02
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FA-3961
U.S. Seal MFG. FA-3961 Head Assembly. Size: 3.375", Type K- Equal to John Crane 21 Double. Carbon Primary Ring, Viton Secondary Seals, Stainless Steel Metal Parts & Stainless Steel Springs. See pdf for full OEM Pump Compatibility.
| Elastomer | Viton |
| Head / Fittings | Type K- Equal to John Crane 21 Double |
| LIQUIFRAM™ Size | 0 |
| Metal Parts | Stainless Steel |
| Part Type | Head Assembly |
| Quick Specs | Head Assembly |
| Rotary | Carbon |
| Seal Code | VCF-F |
| Size | 3.375" |
| Spring | Stainless Steel |
| Type | Sullair [250014-770] |
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