It is easy to put a 2-inch long piece of conduit that is less than half an inch in any cross-sectional measure into a half-inch conduit.
Tobias dahlgren
Meant to say "half inch Proof Coil vs half inch size BBB" anchor chain.
A threaded hole with a minor diameter of approximately 2.61 inches and a thread pitch of 11 threads per inch (TPI) indicates it is likely a 2.5-inch nominal size with a coarse thread. The actual major diameter can be calculated based on the TPI and the thread profile. In this case, the major diameter would be around 2.75 inches, consistent with standard measurements for 11 TPI threads.
2750 Pounds fro 1/2 inch gravel is a good estimate. Actual size of the aggregate and water content.
Actual hole size for 1 inch conduit is 1.362"
A trade size hole for a 2-1/2" EMT conduit connector, the hole needs to be 2-7/8" in diameter. A 3" rigid conduit can also use this size hole without the lock nuts falling into the hole.
4 inch rigid conduit
It is easy to put a 2-inch long piece of conduit that is less than half an inch in any cross-sectional measure into a half-inch conduit.
The recommended conduit size for accommodating 6 gauge wire is 1 inch.
For new 200 amp services the conduit size should be 3 inch PVC.
The recommended PVC conduit size for accommodating a 6-3 wire is 1 inch.
For accommodating 4/3 wire, a 1-inch conduit size should be used.
The appropriate conduit size for accommodating 6/3 wire is typically 1 inch in diameter.
The recommended conduit size for accommodating 6/3 wire is typically 1 inch in diameter.
For 10/2 wire, a 3/4 inch conduit should be used.
For 12/2 wire, a 1/2 inch conduit should be used.