MS21025F
Table I. Dimensions and Dash Numbers.
DASH NO |
THREAD T |
B |
C |
D |
E |
F REF |
H |
R RAD |
S RAD |
||
SIZE DESI0NATION UN-3B |
PITCH DIA |
||||||||||
15 |
.9375-16 |
.8969 |
+.0049 -.0000 |
1.250 |
.531 |
.219 |
.156 |
1.448 |
.250 |
.062 |
.094 |
16 |
1.0000-16 |
.9594 |
+.0049 -.0000 |
1.250 |
.500 |
.250 |
.156 |
1.448 |
.250 |
.062 |
.125 |
20 |
1.2500-16 |
1.2094 |
+.0050 -.0000 |
1.500 |
.562 |
.250 |
.156 |
1.732 |
.250 |
.062 |
.125 |
23 |
1.4375-16 |
1.3969 |
+.0051 -.0000 |
1.688 |
.562 |
.312 |
.156 |
1.948 |
.250 |
.062 |
.125 |
24 |
1.5000-16 |
1.4594 |
+.0051 -.0000 |
1.750 |
.562 |
.312 |
.156 |
2.021 |
.250 |
.062 |
.125 |
28 |
1.7500-16 |
1.7094 |
+.0052 -.0000 |
2.125 |
.562 |
.312 |
.172 |
2.454 |
.250 |
.062 |
.125 |
31 |
1.9375-16 |
1.8969 |
+.0052 -.0000 |
2.250 |
.594 |
.312 |
.172 |
2.596 |
.250 |
.062 |
.125 |
32 |
2.0000-16 |
1.9594 |
+.0052 -.0000 |
2.250 |
.656 |
.312 |
.172 |
2.596 |
.250 |
.062 |
.125 |
39 |
2.4375-16 |
2.3969 |
+.0054 -.0000 |
2.875 |
.812 |
.406 |
.203 |
3.319 |
.250 |
.125 |
.188 |
47 |
2.9375-16 |
2.8969 |
+.0054 -.0000 |
3.500 |
.812 |
.375 |
.203 |
4.060 |
.250 |
.125 |
.188 |
55 |
3.4375-16 |
3.3969 |
+.0056 -.0000 |
4.000 |
1.000 |
.438 |
.203 |
4.619 |
.250 |
.125 |
.188 |
71 |
4.4375-16 |
4.3969 |
+.0059 -.0000 |
5.000 |
1.500 |
.625 |
.203 |
5.774 |
.375 |
.125 |
.250 |
REQUIREMENT;
1. Material: Alloy Steel grades 4140 (UNS 041400) or 8740 (UNS 087400) in accordance with
ASTM A29, AMS 6382, AMS 6322, AMS 6325, AMS 6327, or MIL-S-5626.
2. Plating: Cadmium plate in accordance with QQ-P-416 type II, class 2 or zinc plate in accordance with ASTM B633 type III, Fe/Zn 8 or 12.
3. Heat treatment: Shall be in accordance with MIL-H-6875 to Rockwell hardness Rc 30-34.
4. Surface texture: Shall be Ra 125 microinches in accordance with ANSI/ASME B46.1.
5. Thread: Shall be 16 thread series constant pitch (16-UN) class 3B in accordance with ASME B1.1 unless otherwise specified. Thread acceptability shall be in accordance with ASME B1.3M system 21.
6. EXAMPLE OF PART NUMBER:
MS21025-16 - 1.000-16UN-3B ALLOY STEEL, CADMIUM PLATE NUT MS21025-16Z - 1.000-16UN-3B ALLOY STEEL, ZINC PLATE NUT
2
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