MS90725 at a glance
Where to buy
Specification
| Item | Value |
|---|---|
| Head | hexagon |
| Drive | external hexagon |
| Thread series | coarse (UNC-2A) |
| Material | Medium carbon steel, Grade 5, per the procurement specification. |
| Heat treatment | Minimum tensile load based on a minimum ultimate tensile strength of 120,000 psi for diameters through 1 in, 105,000 psi for 1-1/8 through 1-1/2 in and 90,000 psi over 1-1/2 in, on the stress areas of Handbook H28. |
| Item | Value |
|---|---|
| Finish | Cadmium plated per the procurement specification. |
| Procurement | FF-S-85 |
| Thread specification | FED-STD-H28/2 |
| Status | Check the current issue before design use. Rev. D (2 Jul 1974) with Amendment 1 (6 Nov 1992). Notice 1 (Feb 2000): cancelled and superseded by NASM90725; the part numbers are identical (MS90725-1 = NASM90725-1). |
Dimensions by size
| Dimension, in | 1/4-20 UNC-2A | 5/16-18 UNC-2A | 3/8-16 UNC-2A | 7/16-14 UNC-2A | 1/2-13 UNC-2A | 9/16-12 UNC-2A | 5/8-11 UNC-2A | 3/4-10 UNC-2A | 7/8-9 UNC-2A | 1-8 UNC-2A | 1-1/8-7 UNC-2A | 1-1/4-7 UNC-2A | 1-3/8-6 UNC-2A | 1-1/2-6 UNC-2A | 1-3/4-5 UNC-2A | 2-4 1/2 UNC-2A | 2-1/4-4 1/2 UNC-2A | 2-1/2-4 UNC-2A |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| D body dia | .2450 – .2500 | .3065 – .3125 | .3690 – .3750 | .4305 – .4375 | .4930 – .5000 | .5545 – .5625 | .6170 – .6250 | .7410 – .7500 | .8660 – .8750 | .9900 – 1.0000 | 1.1140 – 1.1250 | 1.2390 – 1.2500 | 1.3630 – 1.3750 | 1.4880 – 1.5000 | 1.7380 – 1.7500 | 1.9880 – 2.0000 | 2.2380 – 2.2500 | 2.4880 – 2.5000 |
| F width across flats | .4280 – .4375 | .4890 – .5000 | .5510 – .5625 | .6120 – .6250 | .7360 – .7500 | .7980 – .8125 | .9220 – .9375 | 1.1000 – 1.1250 | 1.2850 – 1.3125 | 1.4690 – 1.5000 | 1.6310 – 1.6875 | 1.8120 – 1.8750 | 1.9940 – 2.0625 | 2.1750 – 2.2500 | 2.5380 – 2.6250 | 2.9000 – 3.0000 | 3.2620 – 3.3750 | 3.6250 – 3.7500 |
| G width across corners | .488 – .505 | .557 – .577 | .628 – .650 | .698 – .722 | .840 – .866 | .910 – .938 | 1.051 – 1.083 | 1.254 – 1.299 | 1.465 – 1.516 | 1.675 – 1.732 | 1.859 – 1.949 | 2.066 – 2.165 | 2.273 – 2.382 | 2.480 – 2.598 | 2.893 – 3.031 | 3.306 – 3.464 | 3.719 – 3.897 | 4.133 – 4.330 |
| H head height | .150 – .163 | .195 – .211 | .226 – .243 | .272 – .291 | .302 – .323 | .348 – .371 | .378 – .403 | .455 – .483 | .531 – .563 | .591 – .627 | — | .749 – .813 | .810 – .878 | .902 – .974 | 1.054 – 1.134 | 1.175 – 1.263 | 1.327 – 1.423 | 1.479 – 1.583 |
| R radius | .015 – .025 | .015 – .025 | .015 – .025 | .015 – .025 | .015 – .025 | .020 – .045 | .020 – .045 | .020 – .045 | .040 – .065 | .060 – .095 | .060 – .095 | .060 – .095 | .060 – .095 | .060 – .095 | .060 – .095 | .060 – .095 | .060 – .095 | .060 – .095 |
| min tensile lbf | — | 6300 | 9300 | 12800 | 17000 | 21800 | 27100 | 40100 | 55400 | 72700 | 80100 | 101700 | 121300 | 147500 | 171000 | 225000 | 292500 | 360000 |
Dimensions in inches, as tabulated in Tables I and II of the standard (letters as on its drawing); a dash marks a value not given here.
Part numbers and lengths
Part numbers by dash number, with size, length and length tolerance. The standard governs.
1/4-20 UNC-2A26 part numbers
| Part no. | Length, in | Tol. |
|---|---|---|
| MS90725-1 | .375 | +0/-.031 |
| MS90725-2 | .438 | +0/-.031 |
| MS90725-3 | .500 | +0/-.031 |
| MS90725-4 | .562 | +0/-.031 |
| MS90725-5 | .625 | +0/-.031 |
| MS90725-6 | .750 | +0/-.031 |
| MS90725-7 | .875 | +0/-.031 |
| MS90725-8 | 1.000 | +0/-.031 |
| MS90725-9 | 1.125 | +0/-.062 |
| MS90725-10 | 1.250 | +0/-.062 |
| MS90725-11 | 1.375 | +0/-.062 |
| MS90725-12 | 1.500 | +0/-.062 |
| MS90725-13 | 1.750 | +0/-.062 |
| MS90725-14 | 2.000 | +0/-.062 |
| MS90725-15 | 2.250 | +0/-.094 |
| MS90725-16 | 2.500 | +0/-.094 |
| MS90725-17 | 2.750 | +0/-.094 |
| MS90725-18 | 3.000 | +0/-.094 |
| MS90725-19 | 3.250 | +0/-.094 |
| MS90725-20 | 3.500 | +0/-.094 |
| MS90725-21 | 3.750 | +0/-.094 |
| MS90725-22 | 4.000 | +0/-.094 |
| MS90725-23 | 4.250 | +0/-.094 |
| MS90725-24 | 4.500 | +0/-.094 |
| MS90725-25 | 4.750 | +0/-.094 |
| MS90725-26 | 5.000 | +0/-.094 |
5/16-18 UNC-2A26 part numbers
| Part no. | Length, in | Tol. |
|---|---|---|
| MS90725-27 | .375 | +0/-.031 |
| MS90725-28 | .438 | +0/-.031 |
| MS90725-29 | .500 | +0/-.031 |
| MS90725-30 | .562 | +0/-.031 |
| MS90725-31 | .625 | +0/-.031 |
| MS90725-32 | .750 | +0/-.031 |
| MS90725-33 | .875 | +0/-.031 |
| MS90725-34 | 1.000 | +0/-.031 |
| MS90725-35 | 1.125 | +0/-.062 |
| MS90725-36 | 1.250 | +0/-.062 |
| MS90725-37 | 1.375 | +0/-.062 |
| MS90725-38 | 1.500 | +0/-.062 |
| MS90725-39 | 1.750 | +0/-.062 |
| MS90725-40 | 2.000 | +0/-.062 |
| MS90725-41 | 2.250 | +0/-.094 |
| MS90725-42 | 2.500 | +0/-.094 |
| MS90725-43 | 2.750 | +0/-.094 |
| MS90725-44 | 3.000 | +0/-.094 |
| MS90725-45 | 3.250 | +0/-.094 |
| MS90725-46 | 3.500 | +0/-.094 |
| MS90725-47 | 3.750 | +0/-.094 |
| MS90725-48 | 4.000 | +0/-.094 |
| MS90725-49 | 4.250 | +0/-.094 |
| MS90725-50 | 4.500 | +0/-.094 |
| MS90725-51 | 4.750 | +0/-.094 |
| MS90725-52 | 5.000 | +0/-.094 |
3/8-16 UNC-2A26 part numbers
| Part no. | Length, in | Tol. |
|---|---|---|
| MS90725-53 | .375 | +0/-.031 |
| MS90725-54 | .438 | +0/-.031 |
| MS90725-55 | .500 | +0/-.031 |
| MS90725-56 | .562 | +0/-.031 |
| MS90725-57 | .625 | +0/-.031 |
| MS90725-58 | .750 | +0/-.031 |
| MS90725-59 | .875 | +0/-.031 |
| MS90725-60 | 1.000 | +0/-.031 |
| MS90725-61 | 1.125 | +0/-.062 |
| MS90725-62 | 1.250 | +0/-.062 |
| MS90725-63 | 1.375 | +0/-.062 |
| MS90725-64 | 1.500 | +0/-.062 |
| MS90725-65 | 1.750 | +0/-.062 |
| MS90725-66 | 2.000 | +0/-.062 |
| MS90725-67 | 2.250 | +0/-.094 |
| MS90725-68 | 2.500 | +0/-.094 |
| MS90725-69 | 2.750 | +0/-.094 |
| MS90725-70 | 3.000 | +0/-.094 |
| MS90725-71 | 3.250 | +0/-.094 |
| MS90725-72 | 3.500 | +0/-.094 |
| MS90725-73 | 3.750 | +0/-.094 |
| MS90725-74 | 4.000 | +0/-.094 |
| MS90725-75 | 4.250 | +0/-.094 |
| MS90725-76 | 4.500 | +0/-.094 |
| MS90725-77 | 4.750 | +0/-.094 |
| MS90725-78 | 5.000 | +0/-.094 |
7/16-14 UNC-2A25 part numbers
| Part no. | Length, in | Tol. |
|---|---|---|
| MS90725-79 | .438 | +0/-.031 |
| MS90725-80 | .500 | +0/-.031 |
| MS90725-81 | .562 | +0/-.031 |
| MS90725-82 | .625 | +0/-.031 |
| MS90725-83 | .750 | +0/-.031 |
| MS90725-84 | .875 | +0/-.031 |
| MS90725-85 | 1.000 | +0/-.031 |
| MS90725-86 | 1.125 | +0/-.062 |
| MS90725-87 | 1.250 | +0/-.062 |
| MS90725-88 | 1.375 | +0/-.062 |
| MS90725-89 | 1.500 | +0/-.062 |
| MS90725-90 | 1.750 | +0/-.062 |
| MS90725-91 | 2.000 | +0/-.062 |
| MS90725-92 | 2.250 | +0/-.094 |
| MS90725-93 | 2.500 | +0/-.094 |
| MS90725-94 | 2.750 | +0/-.094 |
| MS90725-95 | 3.000 | +0/-.094 |
| MS90725-96 | 3.250 | +0/-.094 |
| MS90725-97 | 3.500 | +0/-.094 |
| MS90725-98 | 3.750 | +0/-.094 |
| MS90725-99 | 4.000 | +0/-.094 |
| MS90725-100 | 4.250 | +0/-.094 |
| MS90725-101 | 4.500 | +0/-.094 |
| MS90725-102 | 4.750 | +0/-.094 |
| MS90725-103 | 5.000 | +0/-.094 |
1/2-13 UNC-2A28 part numbers
| Part no. | Length, in | Tol. |
|---|---|---|
| MS90725-104 | .500 | +0/-.031 |
| MS90725-105 | .562 | +0/-.031 |
| MS90725-106 | .625 | +0/-.031 |
| MS90725-107 | .750 | +0/-.031 |
| MS90725-108 | .875 | +0/-.031 |
| MS90725-109 | 1.000 | +0/-.031 |
| MS90725-110 | 1.125 | +0/-.062 |
| MS90725-111 | 1.250 | +0/-.062 |
| MS90725-112 | 1.375 | +0/-.062 |
| MS90725-113 | 1.500 | +0/-.062 |
| MS90725-114 | 1.750 | +0/-.062 |
| MS90725-115 | 2.000 | +0/-.062 |
| MS90725-116 | 2.250 | +0/-.094 |
| MS90725-117 | 2.500 | +0/-.094 |
| MS90725-118 | 2.750 | +0/-.094 |
| MS90725-119 | 3.000 | +0/-.094 |
| MS90725-120 | 3.250 | +0/-.094 |
| MS90725-121 | 3.500 | +0/-.094 |
| MS90725-122 | 3.750 | +0/-.094 |
| MS90725-123 | 4.000 | +0/-.094 |
| MS90725-124 | 4.250 | +0/-.094 |
| MS90725-125 | 4.500 | +0/-.094 |
| MS90725-126 | 4.750 | +0/-.094 |
| MS90725-127 | 5.000 | +0/-.094 |
| MS90725-128 | 5.500 | +0/-.094 |
| MS90725-129 | 6.000 | +0/-.094 |
| MS90725-400 | 7.000 | |
| MS90725-401 | 8.000 |
9/16-12 UNC-2A25 part numbers
| Part no. | Length, in | Tol. |
|---|---|---|
| MS90725-130 | .562 | +0/-.031 |
| MS90725-131 | .625 | +0/-.031 |
| MS90725-132 | .750 | +0/-.031 |
| MS90725-133 | .875 | +0/-.031 |
| MS90725-134 | 1.000 | +0/-.031 |
| MS90725-135 | 1.125 | +0/-.062 |
| MS90725-136 | 1.250 | +0/-.062 |
| MS90725-137 | 1.375 | +0/-.062 |
| MS90725-138 | 1.500 | +0/-.062 |
| MS90725-139 | 1.750 | +0/-.062 |
| MS90725-140 | 2.000 | +0/-.062 |
| MS90725-141 | 2.250 | +0/-.094 |
| MS90725-142 | 2.500 | +0/-.094 |
| MS90725-143 | 2.750 | +0/-.094 |
| MS90725-144 | 3.000 | +0/-.094 |
| MS90725-145 | 3.250 | +0/-.094 |
| MS90725-146 | 3.500 | +0/-.094 |
| MS90725-147 | 3.750 | +0/-.094 |
| MS90725-148 | 4.000 | +0/-.094 |
| MS90725-149 | 4.250 | +0/-.094 |
| MS90725-150 | 4.500 | +0/-.094 |
| MS90725-151 | 4.750 | +0/-.094 |
| MS90725-152 | 5.000 | +0/-.094 |
| MS90725-153 | 5.500 | +0/-.094 |
| MS90725-154 | 6.000 | +0/-.094 |
5/8-11 UNC-2A24 part numbers
| Part no. | Length, in | Tol. |
|---|---|---|
| MS90725-155 | .625 | +0/-.031 |
| MS90725-156 | .750 | +0/-.031 |
| MS90725-157 | .875 | +0/-.031 |
| MS90725-158 | 1.000 | +0/-.031 |
| MS90725-159 | 1.125 | +0/-.062 |
| MS90725-160 | 1.250 | +0/-.062 |
| MS90725-161 | 1.375 | +0/-.062 |
| MS90725-162 | 1.500 | +0/-.062 |
| MS90725-163 | 1.750 | +0/-.062 |
| MS90725-164 | 2.000 | +0/-.062 |
| MS90725-165 | 2.250 | +0/-.094 |
| MS90725-166 | 2.500 | +0/-.094 |
| MS90725-167 | 2.750 | +0/-.094 |
| MS90725-168 | 3.000 | +0/-.094 |
| MS90725-169 | 3.250 | +0/-.094 |
| MS90725-170 | 3.500 | +0/-.094 |
| MS90725-171 | 3.750 | +0/-.094 |
| MS90725-172 | 4.000 | +0/-.094 |
| MS90725-173 | 4.250 | +0/-.094 |
| MS90725-174 | 4.500 | +0/-.094 |
| MS90725-175 | 4.750 | +0/-.094 |
| MS90725-176 | 5.000 | +0/-.094 |
| MS90725-177 | 5.500 | +0/-.094 |
| MS90725-178 | 6.000 | +0/-.094 |
3/4-10 UNC-2A23 part numbers
| Part no. | Length, in | Tol. |
|---|---|---|
| MS90725-179 | .750 | +0/-.031 |
| MS90725-180 | .875 | +0/-.031 |
| MS90725-181 | 1.000 | +0/-.031 |
| MS90725-182 | 1.125 | +0/-.062 |
| MS90725-183 | 1.250 | +0/-.062 |
| MS90725-184 | 1.375 | +0/-.062 |
| MS90725-185 | 1.500 | +0/-.062 |
| MS90725-186 | 1.750 | +0/-.062 |
| MS90725-187 | 2.000 | +0/-.062 |
| MS90725-188 | 2.250 | +0/-.094 |
| MS90725-189 | 2.500 | +0/-.094 |
| MS90725-190 | 2.750 | +0/-.094 |
| MS90725-191 | 3.000 | +0/-.094 |
| MS90725-192 | 3.250 | +0/-.094 |
| MS90725-193 | 3.500 | +0/-.094 |
| MS90725-194 | 3.750 | +0/-.094 |
| MS90725-195 | 4.000 | +0/-.094 |
| MS90725-196 | 4.250 | +0/-.094 |
| MS90725-197 | 4.500 | +0/-.094 |
| MS90725-198 | 4.750 | +0/-.094 |
| MS90725-199 | 5.000 | +0/-.094 |
| MS90725-200 | 5.500 | +0/-.094 |
| MS90725-201 | 6.000 | +0/-.094 |
7/8-9 UNC-2A22 part numbers
| Part no. | Length, in | Tol. |
|---|---|---|
| MS90725-202 | .875 | +0/-.062 |
| MS90725-203 | 1.000 | +0/-.062 |
| MS90725-204 | 1.125 | +0/-.125 |
| MS90725-205 | 1.250 | +0/-.125 |
| MS90725-206 | 1.375 | +0/-.125 |
| MS90725-207 | 1.500 | +0/-.125 |
| MS90725-208 | 1.750 | +0/-.125 |
| MS90725-209 | 2.000 | +0/-.125 |
| MS90725-210 | 2.250 | |
| MS90725-211 | 2.500 | |
| MS90725-212 | 2.750 | |
| MS90725-213 | 3.000 | |
| MS90725-214 | 3.250 | |
| MS90725-215 | 3.500 | |
| MS90725-216 | 3.750 | |
| MS90725-217 | 4.000 | |
| MS90725-218 | 4.250 | |
| MS90725-219 | 4.500 | |
| MS90725-220 | 4.750 | |
| MS90725-221 | 5.000 | |
| MS90725-222 | 5.500 | |
| MS90725-223 | 6.000 |
1-8 UNC-2A21 part numbers
| Part no. | Length, in | Tol. |
|---|---|---|
| MS90725-224 | 1.000 | +0/-.062 |
| MS90725-225 | 1.125 | +0/-.125 |
| MS90725-226 | 1.250 | +0/-.125 |
| MS90725-227 | 1.375 | +0/-.125 |
| MS90725-228 | 1.500 | +0/-.125 |
| MS90725-229 | 1.750 | +0/-.125 |
| MS90725-230 | 2.000 | +0/-.125 |
| MS90725-231 | 2.250 | +0/-.188 |
| MS90725-232 | 2.500 | +0/-.188 |
| MS90725-233 | 2.750 | +0/-.188 |
| MS90725-234 | 3.000 | +0/-.188 |
| MS90725-235 | 3.250 | +0/-.188 |
| MS90725-236 | 3.500 | +0/-.188 |
| MS90725-237 | 3.750 | +0/-.188 |
| MS90725-238 | 4.000 | +0/-.188 |
| MS90725-239 | 4.250 | +0/-.188 |
| MS90725-240 | 4.500 | +0/-.188 |
| MS90725-241 | 4.750 | +0/-.188 |
| MS90725-242 | 5.000 | +0/-.188 |
| MS90725-243 | 5.500 | +0/-.188 |
| MS90725-244 | 6.000 | +0/-.188 |
1-1/8-7 UNC-2A20 part numbers
| Part no. | Length, in | Tol. |
|---|---|---|
| MS90725-245 | 1.125 | +0/-.125 |
| MS90725-246 | 1.250 | +0/-.125 |
| MS90725-247 | 1.375 | +0/-.125 |
| MS90725-248 | 1.500 | +0/-.125 |
| MS90725-249 | 1.750 | +0/-.125 |
| MS90725-250 | 2.000 | +0/-.125 |
| MS90725-251 | 2.250 | +0/-.188 |
| MS90725-252 | 2.500 | +0/-.188 |
| MS90725-253 | 2.750 | +0/-.188 |
| MS90725-254 | 3.000 | +0/-.188 |
| MS90725-255 | 3.250 | +0/-.188 |
| MS90725-256 | 3.500 | +0/-.188 |
| MS90725-257 | 3.750 | +0/-.188 |
| MS90725-258 | 4.000 | +0/-.188 |
| MS90725-259 | 4.250 | +0/-.188 |
| MS90725-260 | 4.500 | +0/-.188 |
| MS90725-261 | 4.750 | +0/-.188 |
| MS90725-262 | 5.000 | +0/-.188 |
| MS90725-263 | 5.500 | +0/-.188 |
| MS90725-264 | 6.000 | +0/-.188 |
1-1/4-7 UNC-2A19 part numbers
| Part no. | Length, in | Tol. |
|---|---|---|
| MS90725-265 | 1.250 | +0/-.125 |
| MS90725-266 | 1.375 | +0/-.125 |
| MS90725-267 | 1.500 | +0/-.125 |
| MS90725-268 | 1.750 | +0/-.125 |
| MS90725-269 | 2.000 | +0/-.125 |
| MS90725-270 | 2.250 | +0/-.188 |
| MS90725-271 | 2.500 | +0/-.188 |
| MS90725-272 | 2.750 | +0/-.188 |
| MS90725-273 | 3.000 | +0/-.188 |
| MS90725-274 | 3.250 | +0/-.188 |
| MS90725-275 | 3.500 | +0/-.188 |
| MS90725-276 | 3.750 | +0/-.188 |
| MS90725-277 | 4.000 | +0/-.188 |
| MS90725-278 | 4.250 | +0/-.188 |
| MS90725-279 | 4.500 | +0/-.188 |
| MS90725-280 | 4.750 | +0/-.188 |
| MS90725-281 | 5.000 | +0/-.188 |
| MS90725-282 | 5.500 | +0/-.188 |
| MS90725-283 | 6.000 | +0/-.188 |
1-3/8-6 UNC-2A18 part numbers
| Part no. | Length, in | Tol. |
|---|---|---|
| MS90725-284 | 1.375 | +0/-.125 |
| MS90725-285 | 1.500 | +0/-.125 |
| MS90725-286 | 1.750 | +0/-.125 |
| MS90725-287 | 2.000 | +0/-.125 |
| MS90725-288 | 2.250 | +0/-.188 |
| MS90725-289 | 2.500 | +0/-.188 |
| MS90725-290 | 2.750 | +0/-.188 |
| MS90725-291 | 3.000 | +0/-.188 |
| MS90725-292 | 3.250 | +0/-.188 |
| MS90725-293 | 3.500 | +0/-.188 |
| MS90725-294 | 3.750 | +0/-.188 |
| MS90725-295 | 4.000 | +0/-.188 |
| MS90725-296 | 4.250 | +0/-.188 |
| MS90725-297 | 4.500 | +0/-.188 |
| MS90725-298 | 4.750 | +0/-.188 |
| MS90725-299 | 5.000 | +0/-.188 |
| MS90725-300 | 5.500 | +0/-.188 |
| MS90725-301 | 6.000 | +0/-.188 |
1-1/2-6 UNC-2A17 part numbers
| Part no. | Length, in | Tol. |
|---|---|---|
| MS90725-302 | 1.500 | +0/-.125 |
| MS90725-303 | 1.750 | +0/-.125 |
| MS90725-304 | 2.000 | +0/-.125 |
| MS90725-305 | 2.250 | +0/-.188 |
| MS90725-306 | 2.500 | +0/-.188 |
| MS90725-307 | 2.750 | +0/-.188 |
| MS90725-308 | 3.000 | +0/-.188 |
| MS90725-309 | 3.250 | +0/-.188 |
| MS90725-310 | 3.500 | +0/-.188 |
| MS90725-311 | 3.750 | +0/-.188 |
| MS90725-312 | 4.000 | +0/-.188 |
| MS90725-313 | 4.250 | +0/-.188 |
| MS90725-314 | 4.500 | +0/-.188 |
| MS90725-315 | 4.750 | +0/-.188 |
| MS90725-316 | 5.000 | +0/-.188 |
| MS90725-317 | 5.500 | +0/-.188 |
| MS90725-318 | 6.000 | +0/-.188 |
1-3/4-5 UNC-2A16 part numbers
| Part no. | Length, in | Tol. |
|---|---|---|
| MS90725-319 | 1.750 | +0/-.125 |
| MS90725-320 | 2.000 | +0/-.125 |
| MS90725-321 | 2.250 | +0/-.188 |
| MS90725-322 | 2.500 | +0/-.188 |
| MS90725-323 | 2.750 | +0/-.188 |
| MS90725-324 | 3.000 | +0/-.188 |
| MS90725-325 | 3.250 | +0/-.188 |
| MS90725-326 | 3.500 | +0/-.188 |
| MS90725-327 | 3.750 | +0/-.188 |
| MS90725-328 | 4.000 | +0/-.188 |
| MS90725-329 | 4.250 | +0/-.188 |
| MS90725-330 | 4.500 | +0/-.188 |
| MS90725-331 | 4.750 | +0/-.188 |
| MS90725-332 | 5.000 | +0/-.188 |
| MS90725-333 | 5.500 | +0/-.188 |
| MS90725-334 | 6.000 | +0/-.188 |
2-4 1/2 UNC-2A14 part numbers · tolerance +0/-.188
| Part no. | Length, in |
|---|---|
| MS90725-335 | 2.250 |
| MS90725-336 | 2.500 |
| MS90725-337 | 2.750 |
| MS90725-338 | 3.000 |
| MS90725-339 | 3.250 |
| MS90725-340 | 3.500 |
| MS90725-341 | 3.750 |
| MS90725-342 | 4.000 |
| MS90725-343 | 4.250 |
| MS90725-344 | 4.500 |
| MS90725-345 | 4.750 |
| MS90725-346 | 5.000 |
| MS90725-347 | 5.500 |
| MS90725-348 | 6.000 |
2-1/4-4 1/2 UNC-2A12 part numbers · tolerance +0/-.188
| Part no. | Length, in |
|---|---|
| MS90725-349 | 2.750 |
| MS90725-350 | 3.000 |
| MS90725-351 | 3.250 |
| MS90725-352 | 3.500 |
| MS90725-353 | 3.750 |
| MS90725-354 | 4.000 |
| MS90725-355 | 4.250 |
| MS90725-356 | 4.500 |
| MS90725-357 | 4.750 |
| MS90725-358 | 5.000 |
| MS90725-359 | 5.500 |
| MS90725-360 | 6.000 |
2-1/2-4 UNC-2A12 part numbers · tolerance +0/-.188
| Part no. | Length, in |
|---|---|
| MS90725-361 | 2.750 |
| MS90725-362 | 3.000 |
| MS90725-363 | 3.250 |
| MS90725-364 | 3.500 |
| MS90725-365 | 3.750 |
| MS90725-366 | 4.000 |
| MS90725-367 | 4.250 |
| MS90725-368 | 4.500 |
| MS90725-369 | 4.750 |
| MS90725-370 | 5.000 |
| MS90725-371 | 5.500 |
| MS90725-372 | 6.000 |
Part number
What each code means
| Part | Meaning |
|---|---|
| Format | MS90725-<dash number> |
| Example | MS90725-1: 1/4-20 UNC-2A, .375 long |
| Length tolerance, Table I, size 3/4 and under | +0/-.031 to 1.000; +0/-.062 over 1.000 to 2.000; +0/-.094 over 2.000 to 6.000 |
| Length tolerance, Table I, size 7/8 | +0/-.062 to 1.000; +0/-.125 over 1.000 to 2.000 |
| Length tolerance, Table II, sizes 1 to 2-1/2 | +0/-.062 at 1.000; +0/-.125 over 1.000 to 2.000; +0/-.188 over 2.000 to 6.000 |
| Dash | Dash number from Tables I and II selects thread size and length (1 to 372, plus 400 and 401) |
Notes from the standard
- Thread length: minimum twice the diameter plus 1/4 in, tolerance plus 3/16 in or 2-1/2 threads, whichever is greater. On screws too short for the minimum thread length, the distance from the bearing surface of the head to the first complete thread does not exceed 2-1/2 threads for sizes up to and including 1 in, and 3-1/2 threads for larger sizes.
- Threads per FED-STD-H28/2; acceptability per FED-STD-H28/20, System 21.
- Screws less than three diameters long meet the minimum and maximum hardness of the procurement specification, which is their only mechanical property requirement for acceptance.
- Heads are marked; raised markings are preferred, stampings are acceptable.
- Cross reference: the screws of the cancelled standards, including MS35291, MS35293, MS35295 and MS35297, have the same dash numbers in MS90725, so no interchangeability table is needed. The cancelled screws cannot always replace MS90725 screws and should be used until existing stocks are depleted; use only MS90725 screws for design and replacement.
- Approved data governs. Use the screw the SRM, drawing or IPC calls for.
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Sources
- MS90725 Rev. D, 2 Jul 1974 — Screw, Cap, Hexagon Head (Finished Hexagon Bolt), Steel, Grade 5, Cadmium Plated, UNC-2A — dimensions, part numbers and notes. Public domain, distribution unlimited. Notices: 6 Nov 1992 Amendment 1: threads per FED-STD-H28/2, acceptability per FED-STD-H28/20, System 21; note 12 added: screws less than three diameters long meet the minimum and maximum hardness of the procurement specification, which is their only mechanical property requirement for acceptance.; 1 Feb 2000 MS90725D is cancelled and superseded by NASM90725. The part identification number for MS90725D and the part number for NASM90725 are identical.
Educational reference only. not approved data. Always consult the applicable SRM, AMM, or AC 43.13-1B and your certifying authority.