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Carbon Steel Backing Rings for Fiberglass Pipe

This carbon steel backing ring sits behind molded fiberglass flanges to effectively disperse bolt torque and eliminate cracked flanges.

Showing all 11 results

Item # Size Inside Diameter (I.D.) Outside Diameter (O.D.) Thickness (T) Bolt Circle (B.C.) Number of Holes Holes Diameter (H.D.) Weight Each
357-SFP 1” 2.07” 4-1/4” 9/16” 3-1/8” 4 5/8” 1.5 lb
359-SFP 1-1/2” 2.94” 5” 9/16” 3-7/8” 4 5/8” 2 lb
268-SFP 2” 3.46” 6” 9/16” 4-3/4” 4 3/4” 3 lb
182-SFP 2-1/2” 4.05” 7” 9/16” 5-1/2” 4 3/4” 3.5 lb
172-SFP 3” 4.65” 7-1/2” 9/16” 6” 4 3/4” 4 lb
149-SFP 4” 5.94” 9” 9/16” 7-1/2” 8 3/4” 5 lb
126-SFP 6” 7.82” 11” 9/16” 9-1/2” 8 7/8” 7 lb
144-SFP 8” 10.15” 13-1/2” 9/16” 11-3/4” 8 7/8” 9 lb
150-SFP 10” 12.55” 16” 9/16” 14-1/4” 12 1” 11 lb
152-SFP 12” 14.71” 19” 9/16” 17” 12 1” 16 lb
184-SFP 14” 16.50” 21” 9/16” 18-3/4” 12 1-1/8” 19 lb