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The SM05CP1 and SM05CP2 are black-anodized aluminum end caps used to seal off a Ø1/2" lens tube. The SM05CP1 has internal SM05 (0.535"-40) threads while the SM05CP2 has external SM05 threads to seal the end of the lens tube with external or internal SM05 threading, respectively. Both caps have a knurled edge to allow them to be securely hand tightened.

The SM05PL lens tube plug has external SM05 (0.535"-40) threads along its entire length and is designed to seal off our Ø1/2" lens tubes. It can be threaded into an SM05 lens tube using an SPW801 spanner wrench that can be adjusted so that the tips of the prongs on the SPW801 fit into the two shallow holes, each of which is located 0.20" from the center dimple. The center dimple of the SM05PL allows it be customized in a machine shop.

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The SM1CP1 and SM1CP2 are black anodized aluminum end caps used to seal off a Ø1" lens tube. The SM1CP1 has internal SM1 (1.035"-40) threads while the SM1CP2 has external SM1 threads to seal the end of the lens tube with external or internal SM1 threading, respectively. Both caps have a knurled edge to allow them to be securely hand tightened. The SM1CP2M and SM1PL have a center drilled dimple located on the optical axis so that they can be machined to make custom SM1 parts.

The SM1CP2M is an end cap with external SM1 threading and a knurled lip while the SM1PL is a plug (no lip) with external SM1 threading. The SM1PL can be threaded into an SM1 lens tube using an SPW801 spanner wrench that can be adjusted so that the tips of the prongs on the SPW801 fit into the two shallow holes located 10 mm out from the center dimple.

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The SM2CP1 and SM2CP2 are black anodized aluminum end caps that allow an Ø2" lens tube to be sealed off. The SM2CP1 has internal SM2 (2.035"-40) threads while the SM2CP2 has external SM2 threads to seal the end of the lens tube with external or internal SM2 threading, respectively. Both caps have a knurled edge to allow them to be securely hand tightened.

The SM2PL is a blank plug with external SM2 threading. It can be threaded into a lens tube using an SPW801 spanner wrench that can be adjusted so that the tips of the prongs on the SPW801 fit into the two shallow holes machined near the edge of the plug. The center of the SM2PL plug is dimpled to allow it to be customized in a machine shop with excellent centration.

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The SM3CP2 is a black anodized aluminum End Cap that allows SM3-Threaded (3.035"-40) lens tubes to be sealed off. The cap, which features a knurled edge for improved grip, has external SM3 threading.