D Ring  
Description:
Material: Acetal(POM) Nylon/(NY)
Size:     
3/8" (10mm)  1-50004  
1/2" (12mm)  1-20351 2-25488 
5/8" (15mm)  1-15488 2-05488 
3/4'' (inter.)  2-05047  
20mm  2-04757 2-05357 
7/8'' (22mm)  4993* 5283* 
1" (25mm)  2-04274 2-05283 
1" (thick) (25mm)  2-14274 2-25283 
1-1/2" (40mm)   2-14275 2-04275 
*4993,5528 from USA only.