EXTSW .443” ID x 1.740" OD x 3/8” Thick 316 Stainless Washer 1/2" ID 316 stainless spacer 708” Thick 316 alloy Stainless

708” Thick 316 alloy Stainless Shaft Spacer

EXTSW 3/8 -16 Tapped / threaded ID x 1 1/4” OD x 1/2 inch long 316 alloy stainless spacer

EXTSW 3/8” ID x 3/4” x 2" long 304 Alloy Stainless Steel  Spacers

Grade 316 is the standard molybdenum-bearing grade The molybdenum gives 316 better overall corrosion resistant properties than Grade 304

Some other websites will list their spacers as "18-8" or just "stainless steel"

EXTSW .443” ID x 1.740" OD x 3/8” Thick 316 Stainless Washer 1/2" ID 316 stainless spacer 708” Thick 316 alloy StainlessEXTSW 7 16 ID x 1 3 4 OD x 3 8 Thick 316 Stainless Washer Actual size . 443" ID x . 1. 740" OD x . 375" Thick (+ . 003" on all dimensions) (. 030 inch Radius OD) Slightly countersunk ID (no sharp edges) Made in USA. 316 Stainless has the ULTIMATE corrosion resistance.