Pack beans into hot jars, trimming to fit 1/2 inch from top. Add 1 pepper, 1 garlic clove (quartered), 1/2 teaspoon mustard seeds, and 1/2 teaspoon dill seeds to each jar.
Bring vinegar, 5 cups water, and pickling salt to a boil; pour into each jar, filling to 1/2 inch from top. Remove air bubbles; wipe jar rims. Cover at once with metal lids; screw on bands.
Process in a boiling-water bath 10 minutes. 1 3/4 teaspoons dried crushed red pepper may be substituted for hot red peppers. Add 1/4 teaspoon per jar.