MS16995H
TABLE I. DIMENSIONS AND DASH NUMBERS - continued
Nominal Size |
5/16(.3125) |
3/8 (.375) |
1/2 (.500) |
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Threads Per Inch |
18 UNC-3A |
16 UNC-3A |
13 UNC-3A |
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D Body Max Min A Head Max Min H Head Height Max Min S Head Side Height Min J Socket Width Max Across Flats Min T Key Engagement Min G Wall Thickness Min K Chamfer or Radius Max F Fillet Extension Max Min M Basic Thread Length 1_/ Ref |
.3125 .3053 .469 .457 .313 .306 .281 .2530 .2500 .151 .119 .008 .017 .012 1.125 |
.3750 .3678 .563 .550 .375 .368 .337 .3160 .3125 .182 .143 .008 .020 .015 1.250 |
.5000 .4919 .750 .735 .500 .492 .450 .3790 .3750 .245 .190 .010 .026 .020 1.500 |
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Min Tensile Strength Load Lbs |
4,190 |
6,200 |
11,300 |
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L Length |
Tolerance |
Dash No |
Grip Length Max |
Body Length Min |
Dash No |
Grip Length Max |
Body Length Min |
Dash No |
Grip Length Max |
Body Length Min |
|
Size 5/16 (.3125) and 3/8 (.375) |
Size 1/2 (.500) |
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.375 .500 .625 .750 .875 1.000 |
+.000 -.030 |
+.000 -.030 |
61 62 63 64 65 66 67 68
69 70 71 72 |
.625 1.125 1.125 |
.347 .847 .847 |
77 78 79 80 81 82 83
84 85 86 87 |
.500 .500 1.000 1.000 |
.187 .187 .687 .687 |
92 93 94 95 96 97 98
99 100 101 102 |
.750 .750 .750 1.500 |
.365 .365 .365 1.115 |
1.250 1.500 1.750 2.000 2.250 2.500 |
+.000 -.040 |
+.000 -.060 |
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2.750 3.000 |
+.000 -.060 |
+.000 -.080 |
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1_/ See note 2
4
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