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Genuine Apeks OEM cap for Apeks XTX series DIN (aka G 5/8) first stages
Seals with the DIN connector to prevent moisture from entering as well as protecting the threads
Includes spare oxygen compatible small DIN O-ring (size 111)
Both the Apeks branded cap and oxygen compatible spare O-ring are BLACK color

Apeks DIN Protective Cap w/O-ring

Name: Apeks DIN Protective Cap w/O-ring
Brand: Apeks
SKU: APX-RG912127
Price: 12.00 USD
Availability: OutOfStock

$12.00

On Order

SKU

APX-RG912127

This threaded cap for Apeks DIN (aka G 5/8) regulators is designed to seal the connector as well as protecting the threads. The cap also has a spare oxygen compatible small DIN O-ring suitable for use with Apeks first stages.

Details

This threaded dust cap for Apeks DIN (aka G 5/8) regulators is designed to reproduce the sealing surface of a DIN valve. This seals the connector when screwed to the DIN fitting thus debris and moisture is prevented from entering the DIN orifice of the regulator as well as protecting the threads. The cap has a unique method to store an included spare oxygen compatible small DIN O-ring suitable for use with Apeks first stages. This less common size #111 O-ring better fits the slightly smaller o-ring groove of Apeks, Atomic, and Scubapro brand DIN connectors, see the discussion in our TekTip below. Both the Apeks branded cap and oxygen compatible spare O-ring are BLACK color

Best practice when rinsing regulators in fresh water is to do so while the regulator is pressurized. This cap will make a tight seal with the DIN o-ring in the regulator first stage DIN inlet, such that the cap is suitable for sealing the first stage inlet when you wish to gently spray fresh water on the regulator to rinse. Regardless, avoid submerging an entire unpressurized regulator including the second stages in a dunk tank or rinse bucket as in some circumstances that can allow water to enter through the second stages and if not immediately blown out the moisture can travel up the hoses in to the first stage.

More Information

More Information
Product Name	Apeks DIN Protective Cap w/O-ring
Brand	Apeks
SKU	APX-RG912127
Weight	Less than 1 oz
Country of Manufacture	United Kingdom
HS Code	4016.93

Reviews

Tek Tip

SCUBA Regulator DIN Connector O-ring Sizes

The original specification for dimensions of the O-ring groove in the nose of the DIN connector for compressed air has an inside dimension of 12 mm and an outside dimension of 17 mm with a depth of 1.9 mm. The original specification for the sealing O-ring itself is an inside diameter of 11.2 mm with a cross section of 2.65 mm. From what we have been able to determine, the groove and O-ring specifications for the DIN fittings found on first stages seem to vary among the SCUBA regulator manufacturers, perhaps because they have referenced different versions of different standards or to address practical issues that arose during usage by divers.

The sealing O-ring in the nose of the DIN connector groove we find on most SCUBA regulator first stages is typically an SAE AS568 and BS ISO 3601 imperial standard 112 size that is equivalent to 12.37 X 2.62 metric dimensions including our DGX Gears, Dive Rite, and Mares XR brands. In the case of Apeks (plus the Atomic and ScubaPro brands) their groove better accepts the next smaller 111 size O-ring that is equivalent to 10.77 X 2.62 metric dimensions. Both the 112 and 111 size O-rings are available in a variety of choices for material and durometer. The groove in the Poseidon (plus the Cressi brand) regulator DIN connectors measures closest to the original standard, best accepting a BS ISO 3601 metric size O-ring with 11.3 X 2.4 dimensions for which there is no imperial standard equivalent. The M2.4X11.3 size O-ring is uncommon in North America, especially in a material recommended for use with Nitrox. (FYI, the O-ring in standard Yoke K-valves is easy, it is always an 014 size. However, there are some very rarely seen older K-valves that pre-date the CGA-850 standard which might use other o-ring sizes. ) Dive Gear Express does stock a generic fluorocarbon elastomer (aka Viton™, aka FKM, aka FPM) O-rings in all these sizes, and also the OEM Poseidon DIN connector O-Ring as well as the OEM Apeks DIN connector O-Ring.

In the European Union nations, the EN 144-3:2003 standard requires a valve outlet known as M26x2 to be used on dive cylinders containing oxygen or Nitrox mixtures with greater than 22% oxygen. The M26x2 outlet is similar in appearance but slightly larger than the standard DIN outlet, and thus incompatible with the standard DIN connector found on SCUBA regulators. The purpose of this incompatible valve outlet is to force the dedication of cylinders, regulators and fill stations to Nitrox use. The sealing O-ring in the nose of the M26x2 connector is 13.9 X 2.6 metric dimensions, equivalent to the 113 size. The M26x2 outlet and connector for Nitrox and oxygen is very rarely seen outside the EU.

Apeks DIN Protective Cap w/O-ring

Customer Reviews