MS51959D
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 Sharp Min Sharp Abs Min |
.172 .156 .147 |
.225 .207 .195 |
.279 .257 .244 |
.332 .306 .292 |
.385 .359 .340 |
.507 .477 .452 |
.635 .600 .568 |
.762 .722 .685 |
|
H Head Height - Full Head Ref |
.051 |
.067 |
.083 |
.100 |
.116 |
.153 |
.191 |
.230 |
|
H1 Head Height Max Min |
.036 .028 |
.047 .038 |
.059 .045 |
.070 .058 |
.081 .068 |
.107 .092 |
.134 .116 |
161 .140 |
|
R Radius-Full Head Min |
.034 |
.045 |
.055 |
.066 |
.076 |
.100 |
.125 |
.150 |
|
R1 Radius - Undercut Head Max |
.013 |
.017 |
.021 |
.025 |
.029 |
.038 |
.047 |
.056 |
|
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 .625 .750 .875 1.000 |
+0 -.031 |
1 |
11 12 |
24 25 |
39 40 41 |
1/ 58 59 60 |
76 77 78 |
92 93 94 |
107 |
2 3 4 5 6 7 8 9 1/ 10 |
|||||||||
13 14 15 16 17 18 19 20 21 221/ 23 |
26 27 28 29 30 31 32 33 34 35 36 37 38 |
||||||||
42 43 44 45 46 47 48 49 50 51 52 53 1/ 54 1/ 55 1/ 56 1/ 57 |
|||||||||
61 62 63 64 65 66 67 68 69 70 71 72 73 1/ 74 1/ 75 |
|||||||||
79 80 81 82 83 84 85 86 87 88 89 1/ 90 1/ 91 |
|||||||||
95 96 97 98 99 100 101 102 103 104 1/ 105 1/ 106 |
108 109 110 111 112 113 114 115 116 117 118 119 |
||||||||
1.250 1.500 1.750 2.000 |
-.062 |
||||||||
2.250 2.500 2.750 3.000 |
+0 -.094 |
||||||||
1/ Indicates manufacturer's non-stock production items
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 (not available 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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