The cap covers mounting holes. Cap threads are 1-1/4"-11-1/2 NPSM-Straight. Gas, Diesel and Water caps include attachment cable. The cap threads for 351400, 351480 and 351481 are 1-1/2"-11-1/2 NPSM-Straight. Gas and Diesel caps include attachment cable.
California Residents: 
WARNING
Cancer and Reproductive Harm -
P65Warnings.ca.gov
Replacement Cap for gas, diesel and water hose deck fills. For 1-1/4" straight pipe threads. Highly polished finish. Flush cap is slotted for separate key and features an O-ring that seals the cap...
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Waste Deck Fill Keyless. Investment Cast 316 Stainless
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Sea Dog Replacement Deck Fill Cap Replacement 316 Stainless Steel Gas Cap for Sea Dog 351320-351323 Gas Fills. Threads 1-1/4" - 11-1/2" NPSM
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Whitecap Stainless Steel 1-1/2" Angled Gas Deck Fill w/ Key The Whitecap Stainless Steel 1-1/2" Angled Gas Deck Fill w/ Key is imprinted and color coded with the international standard symbols...
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Sea Dog Cast Stainless Fuel Deck Fill with Deck Key Features: Comes with Deck Plate Key Fits 1-1/2" Fuel Hose Labeled for Gas only The cap threads are 1-1/4" - 11-1/2 NPSM -...
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Locking Gas Cap. Black plastic cap with cover for key hole. Includes 2 keys. Fits 1313 and 1399 models. Cap outside thread diameter: 1 15/32 inches
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Gas Cap with O-Ring and Retainer for Perko 1270 Gas Fill Necks.
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Replacement Cap 351350 - 351353. Cap threads are 1-1/2" - 12 NPSM - Straight. Gas, diesel and water caps include attachment chains.
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Fuel System Locking Cap for 1-1/2" Non-Vented Fills. Black Plastic with Gasket Built in Lock Cylinder Fits PERKO Fills 0520, 0527, 0528, 0557, 0599 and 1270
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