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Selected SPI Neck Finish Specifications for Standard Closures

MM T E 400H 410H 415H S I THDS/
IN.
Max Min Max Min Max Min Max Min Max Min Max Min Min
13 .514 .502 .454 .442         .467 .437 .052 .022 .218 12
15 .581 .569 .521 .509         .572 .542 .052 .022 .258 12
18 .704 .688 .620 .604 .386 .356 .538 .508 .632 .602 .052 .022 .325 8
20 .783 .767 .699 .683 .386 .356 .569 .539 .757 .727 .052 .022 .404 8
22 .862 .846 .778 .762 .386 .356 .600 .570 .852 .822 .052 .022 .483 8
24 .940 .924 .856 .840 .415 .385 .661 .631 .972 .942 .061 .031 .516 8
28 1.088 1.068 .994 .974 .415 .385 .723 .693 1.097 1.067 .061 .031 .614 6
30 1.127 1.107 1.033 1.013 .418 .388         .061 .031 .653 6
33 1.265 1.241 1.171 1.147 .418 .388     1.289 1.259 .061 .031 .791 6
35 1.364 1.340 1.270 1.246 .418 .388         .061 .031 .875 6
38 1.476 1.452 1.382 1.358 .418 .388         .061 .031 .987 6
40 1.580 1.550 1.486 1.456 .418 .388         .061 .031 1.091 6
43 1.654 1.624 1.560 1.530 .418 .388         .061 .031 1.165 6
45 1.740 1.710 1.646 1.616 .418 .388         .061 .031 1.251 6
48 1.870 1.840 1.776 1.746 .418 .388         .061 .031 1.381 6
51 1.968 1.933 1.874 1.839 .423 .393         .061 .031 1.479 6
53 2.067 2.032 1.973 1.938 .423 .393         .061 .031 1.578 6
58 2.224 2.189 2.130 2.095 .423 .393         .061 .031 1.735 6
60 2.342 2.307 2.248 2.213 .423 .393         .061 .031 1.853 6
63 2.461 2.426 2.367 2.332 .423 .393         .061 .031 1.972 6
66 2.579 2.544 2.485 2.450 .423 .393         .061 .031 2.090 6
70 2.736 21.701 2.642 2.607 .423 .393         .061 .031 2.247 6
75 2.913 2.878 2.819 2.784 .423 .393         .061 .031 2.424 6
77 3.035 3.000 2.941 2.906 .502 .472         .075 .045 2.546 6
83 3.268 3.233 3.148 3.113 .502 .472         .075 .045 2.753 5
89 3.511 3.476 3.391 3.356 .550 .520         .075 .045 2.918 5
100 3.937 3.902 3.817 3.782 .612 .582         .075 .045 3.344 5
110 4.331 4.296 4.211 4.176 .612 .582         .075 .045 3.737 5
120 4.724 4.689 4.604 4.569 .700 .670         .075 .045 4.131 5

 

Neck drawing for caps and closures on plastic bottles from Plastic Bottle Corporation
 

“H” Dimension: The height of the neck finish. Measured from the top of the neck to the point where the diameter, “T”, extends down and intersects the shoulder.

“S” Dimension: Measured from the top of the finish to the top edge of the first thread. The “S” dimension is the key factor in determining the orientation of the closure to the bottle and the amount of thread engagement between the bottle and cap.

“I” Dimension: The inner diameter of the bottle neck. Specifications require a minimum “I” to allow sufficient clearance for filling tubes. Linerless closures, with a plug or land seal, and dispensing plugs and fitments require a controlled “I” for a proper fit.

“T” Dimension: The outside diameter of the thread. The tolerance of the “T” dimension determines the mate between bottle and closure.

“E” Dimension: The minor diameter measured across the root of the threads.

 

 

Technical Article: The Necessity of Obtaining Closure Samples and Information Prior to a Plastic Bottle Production Run

Child Resistant Closure Specifications

Material Codes/Recycling Symbols

Freight Classifications

Properties of Resins

SPI Neck Finish Specifications

Technical Article: The Blow Molding
Process
Closures & Containers Magazine

Technical Article: The Market Share
Closures & Containers Magazine

Third Party Packaging Certification Agencies

Torque Guidelines for Closures