Sta-Kon RG2-38 INS NYL RING TERM 2 BOLT 3/8IN RED

The RG2-38 is built for 2 AWG conductor. It's a single-size barrel, so smaller wire won't crimp reliably in it and larger won't enter. If your conductor is anything other than 2 AWG, you need a different terminal, not a different crimp die.

Yes. The RG2-38 ring tongue is sized for 3/8 inch bolt or stud hardware, and it's a two-bolt (two-hole) tongue, so it lands on a pair of 3/8 inch studs rather than a single post. That matters on busbar and large breaker lugs where a two-hole pattern is required to keep the lug from rotating.

Rated 600 V, and it carries UL file E9809. That covers the usual 120/208, 277/480 V commercial power work, so it's acceptable for panel, switchgear and motor terminations inside that range. Don't use it above 600 V.

The barrel is copper, so it's intended for copper conductor. Aluminum wire needs an AL-rated or AL9CU dual-rated connector; crimping aluminum into a copper-only terminal risks a dissimilar-metal connection that loosens and heats over time.

Use a two-hole tongue when the landing pad has a two-bolt pattern or when the connection must resist twisting, which is common on ground bars, busbars, and larger panel terminations. A single-hole lug is the right choice on a single stud or breaker post. The RG2-38 is the two-bolt, 3/8 inch version for 2 AWG copper, so it only works where both 3/8 inch holes line up with your pad spacing.

No. A 2 AWG copper barrel needs a heavy-duty crimper with the correct die for that size, typically a hydraulic or long-arm ratchet tool. Standard insulated-terminal pliers top out well below this gauge and will leave an under-compressed joint that heats under load. The RG2-38 does not include a tool.

Order Sta-Kon RG2-38. That's the manufacturer part number for the nylon insulated two-bolt ring terminal with a 3/8 inch hole pattern on 2 AWG copper, in red. Parts are made in Mexico.

The nylon insulation on the RG2-38 is red. On heavy-gauge Sta-Kon terminals the color is a quick field identifier for the wire size the barrel accepts, so a crew pulling parts can sort 2 AWG terminals from adjacent sizes on sight. It is not a voltage or polarity code, and it does not change the 600 V rating.

The RG2-38 is a nylon insulated ring terminal, so the barrel and the transition to the conductor are already sleeved and no extra tape or boot is needed for basic insulation at 600 V. Nylon is tougher and more abrasion resistant than vinyl, which is why it's specified in panels and junction boxes where terminals get pushed around during dress-in. Heat shrink is still worth adding in wet or high-vibration locations, but it is not required to make the terminal rated.