Commodity2005200620072008200920102011
Coach screws of iron/steel$6,411$4,597$4,041$815$890$63,355$702
Wood screws other than coach screws, of iron/steel$40 $9,940$31,742$1$3 
Screw hooks & screw rings, of iron/steel  $324$265$1,866$1,605$650
Self-tapping screws of iron/steel$2,976$4,176$3,261 $595$69,962$1,837
Screws & bolts (excl. of 7318.11-7318.14), whether or not with their nuts/w ...$386,127$529,870$899,765$1,293,774$1,143,248$5,740,651$1,474,000
Nuts of iron/steel$76,253$116,426$137,263$231,708$191,433$121,054$147,019
Threaded arts. of iron/steel (excl. of 73.07, 7318.11-7318.16)$66,713$96,670$88,478$46,191$31,580$118,930$75,007
Spring washers & oth. lock washers, of iron/steel$13,734$13,150$9,793$22,906$22,117$23,298$113,449
Washers (excl. of 7318.21) of iron/steel$56,773$90,604$38,650$174,981$228,319$239,293$399,673
Rivets of iron/steel$505$991$4,139$2,830$10,088$8,627$15,041
Cotters & cotter-pins, of iron/steel$85,020$80,703$108,435$218,868$468,705$120,929$200,907
Non-threaded arts. sim. to rivets, cotters and the like, of iron/steel (exc ...$72,186$146,308$150,604$91,595$126,589$141,111$304,098
Total$766,738$1,083,495$1,454,693$2,115,675$2,225,431$6,648,818$2,732,383