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- Economical one-piece design in cast iron or aluminum
- Lockable Hasp Type with Brass cover
 
One Piece Fill
Caps
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- Economical one-piece design
- Available in cast iron or aluminum
- 2" female NPT
- Opens with pass key (sold separately)
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Lockable Hasp Type
Fill Cap
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- Solid cast iron construction, with malleable iron hasp
- Brass cover with gasket provides a waterproof seal
- Available in 2" and 3" female NPT sizes
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Fill Cap
Keys
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- Two-Way Key fits Fill Caps: 4181, 4182, 4183, 4184,
4185, 4307, 4308, 4309, 4316, 4317
- Six-Way Key fits 90% of all caps
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