MS51957D
Table I. Dimensions and Dash Numbers.
D Nominal Size |
.0860 |
.1120 |
.1380 |
.1640 |
.1900 |
.2500 |
.3125 |
.3750 |
|
Threads Per Inch UNC-2A |
56 |
40 |
32 |
32 |
24 |
20 |
18 |
16 |
|
D1 Body Diameter Max Min |
.0860 .0717 |
.1120 .0925 |
.1380 .1141 |
.1640 .1399 |
.1900 .1586 |
.2500 .2127 |
.3125 .2712 |
.3750 .3287 |
|
A Head Diameter Max Min |
.1670 .1550 |
.2190 .2050 |
.2700 .2560 |
.3220 .3060 |
.3730 .3570 |
.4920 .4730 |
.6150 .5940 |
.7400 .7160 |
|
H Head Height Max Min |
.0620 .0530 |
.0800 .0700 |
.0970 .0870 |
.1150 .1050 |
.1330 .1220 |
.1750 .1620 |
.2180 .2030 |
.2610 .2440 |
|
P Head Radius Ref |
.0100 |
.0100 |
.0150 |
.0150 |
.0200 |
.0350 |
.0400 |
.0400 |
|
R Fillet Radius Max |
.0130 |
.0170 |
.0210 |
.0250 |
.0290 |
.0380 |
.0470 |
.0560 |
|
Driver Size |
1 |
1 |
2 |
2 |
2 |
3 |
4 |
4 |
|
Tensile Strength Lbs-Min |
300 |
480 |
730 |
1,120 |
1,400 |
2,540 |
4,190 |
6,200 |
|
L Length |
Tolerance |
Dash No. |
Dash No. |
Dash No. |
Dash No. |
Dash No. |
Dash No. |
Dash No. |
Dash No. |
.125 .188 .250 .312 .375 .438 .500 .562 .625 .750 .875 1.000 |
+0 -.031 |
1 2 3 4 5 6 7 1412/ 8 9 10 1422/ |
11 12 13 14 15 16 17 1202/ 18 19 20 21 1212/ 221/ 1222/ 23 |
24 25 26 27 28 29 30 1232/ 31 32 33 34 1242/ 35 1252/ 36 37 38 |
39 40 41 42 43 44 45 1262/ 46 47 48 49 1272/ 50 1282/ 51 52 53 54 55 56 57 |
1/ 58 59 60 61 62 63 1292/ 64 65 66 67 1302/ 68 1312/ 69 70 71 72 73 741/ 751/ |
76 77 78 79 1322/ 80 81 82 83 1332/ 84 1342/ 85 86 87 88 89 901/ 911/ |
92 93 94 1352/ 95 96 97 98 1362/ 99 1372/ 100 101 102 103 104 1051/ 1061/ |
107 1382/ 108 109 110 111 1392/ 112 1402/ 113 114 115 116 117 118 119 |
1.125 1.250 1.375 1.500 1.750 2.000 |
+0 -.062 |
||||||||
2.250 2.500 2.750 3.000 |
+0 -.094 |
||||||||
1/ Indicates manufacturer's non-stock production items
2/ Inactive for new design after 18 July 1986
REQUIREMENTS:
1. MATERIAL: Austenitic Corrosion-Resistant Steel screws shall be manufactured from Type 302 (UNS S30200), Type 304 (UNS S30400), Type 304L (UNS S30403), Type 305 (UNS S30500), Type 316 (UNS S31600), Type 316L (UNS S31603), Type 384 (UNS S38400), or Type XM-7 (UNS S30430) in accordance with chemical composition specified in QQ-S-763. (See Material Identification Marking and Material Code).
2. FINISH: Passivate in accordance with QQ-P-35 or Black Oxide coating (except for Type 316 or Type 316L)
in accordance with MIL-C-13924, Class 4. (See Finish Code).
3. MECHANICAL PROPERTIES: The minimum tensile strength in load pounds, indicated for each size in Table I, is based on 80,000 PSI Minimum Tensile Strength. Load pounds are calculated by the stress areas indicated in FED-STD-H28/2. The yield strength, based on .2 percent offset, shall be 30,000 psi minimum.
2
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