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Classic Stacking Chairs
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Threaded Adapters and Metal Grater Clips to insert inside square tubing.

Square metal grater clip
Square Metal Grater Clips 16,18 Guage
Barbed and flexible for fastening. Heat treated and plated to resist rusting (steel w/.060 thickness).
OD Thread Price Qty  
1" 1/4-20 $1.58
1" 5/16-18 1.22
1" 3/8-16 2.24
1-1/4" 1/4-20 2.10
1-1/4" 5/16-18 2.18
1-1/4" 3/8-16 2.72
1-1/2" 3/8-16 2.98
Square Star Type Metal Grater Clips
Square Star Type Metal Grater Clips Barbed and flexible for fastening. Heat treated and plated to resist rusting (steel w/.060 thickness).
Tube Outside Thread Price Qty  
3/4" 1/4-20 $2.37
3/4" 5/16-18 3.27
1" 1/4-20 2.94
1" 5/16-18 3.72 
1" 3/8-16 4.89
1-1/4" 1/4-20   5.31
1-1/4" 5/16-18   5.31
1-1/2" 3/8-16 5.79
2" 5/16-18 6.06
2" 3/8-16 6.33
Round Star Type Metal Grater Clips
Round Star Type Metal Grater Clips Barbed and flexible for fastening. Heat treated and plated to resist rusting (steel w/.060 thickness).
Tube Outside Thread Price Qty  
7/8" 1/4-20 $2.37
7/8" 5/16-18 3.03
1" 1/4-20   2.67
1" 5/16-18   3.45
1" 3/8-16   4.32
1-1/4" 1/4-20   2.64
1-1/4" 5/16-18   3.87
1-1/2" 5/16-18   4.89
1-1/2" 3/8-16   5.43
2" 1/4-20   5.07
2" 5/16-18   5.97