MS14182B
Table I. Dash Numbers and Dimensions.
Dash Number |
Nominal Size |
Thread |
MS33787 Element Number |
A Max. |
B (a) Min. |
ID (a) |
H Max. |
v Min. |
J Min. |
x |
Ultimate Axial Strength Lb.Min.(b) |
Approx. Weight Lb/100 |
|
Max. |
Min. |
||||||||||||
03 |
No.10 |
.1900-32UNJF-3B |
8 |
.362 |
.322 |
.220 |
. 190 |
.220 |
.023 |
.089 |
.003 |
4,970 |
.26 |
04 |
.250 |
.2500-28UNJF-3B |
10 |
.460 |
.420 |
.280 |
.250 |
.290 |
.033 |
.110 |
.003 |
8,870 |
.51 |
05 |
.312 |
.3125-24UNJF-3B |
12 |
.563 |
.522 |
.342 |
.312 |
.360 |
.038 |
.147 |
.003 |
14,100 |
.88 |
06 |
.375 |
.3750-24UNJF-3B |
14 |
.669 |
.629 |
.405 |
.375 |
.430 |
.045 |
.176 |
.003 |
20,900 |
1.40 |
07 |
.437 |
.4375-20UNJF-3B |
18 |
.773 |
.733 |
.473 |
.438 |
.500 |
.053 |
.206 |
.003 |
28,300 |
2.40 |
08 |
.500 |
.5000-20UNJF-3B |
20 |
.879 |
.839 |
.535 |
.500 |
.575 |
.060 |
.235 |
.003 |
37,800 |
3.50 |
09 |
.562 |
.5625-18UNJF-3B |
22 |
.982 |
.942 |
. 597 |
.562 |
.650 |
.068 |
.264 |
.004 |
47,900 |
4.80 |
10 |
.625 |
.6250-18UNJF-3B |
24 |
1.088 |
1.048 |
.660 |
.625 |
.720 |
.075 |
.294 |
.004 |
59,900 |
6.30 |
12 |
.750 |
.7500-16UNJF-3B |
30 |
1.296 |
1.256 |
.785 |
.750 |
.860 |
.090 |
.353 |
.004 |
86,900 |
8.00 |
14 |
.875 |
.8750-14UNJF-3B |
34 |
1.505 |
1.465 |
.910 |
.875 |
1.000 |
.105 |
.411 |
.005 |
119,000 |
9.90 |
16 |
1.000 |
1.0000-12UNJF-3B |
38 |
1.720 |
1.670 |
1.035 |
1.000 |
1.150 |
.120 |
.470 |
.006 |
155,000 |
12.00 |
(a) Minimum bearing area based on a bearing stress of 115 KSI.
(b) Axial strength determined from formula Wa=ftuA where A is the cross sectional area, in square inches, based on the maximum pitch diameter of bolt thread, Ftu is 220 KSI and Wa is the axial strength in pounds.
Requirements:
1. Material: nickel alloy 718 per AMS 5662, AMS 5663 (UNS N07718); capable of meeting strength requirements specified
2. Surface texture: bearing surface 125 in accordance with ANSI/ASME B46.1.
3. Finish: Nickel strike;coat with dry film lubricant per Mil-l-46010 Yype I.
Cadmium plate per QQ-P-416; Type I, class 2.
Silver Plate per AMS 2410 (0.0003-0.0005 thickness-threads only)
4. Threads: MIL-S-8879 before lubrication.
5. Wrenching element: ( spline drive) per MS33787; drivers per MIL-W-8982.
6. Performance per MIL-N-85730 except for:
(a) Test bolts for axial strength, stress durability, torque effectively, locking torque, stress corrosion, accelerated vibration shall be nickel alloy 718, 220 KSI minimum ultimate tensile strength, dry film lubricated.
(b) For torque effectively, reusability of dry film lubricated nuts shall be limited to five (5) cycles
(c) For wrenching torque, bolts shall be 260,000 psi minimum
(d) Baking temperature for torque effectively, vibration, and stress Durability shall be 800 F except dry film lubricated nuts and cadmium plated nuts shall be 450 F.
7. Part number: Part number shall consist of the ms designation plus finish Code and dash number.
Add "P" after ms number to designate cadmium plate. Add "S" after ms number to designate silver plate.
Add "L" after MS number to designate nickel strike/dry film lubricant.
Example: MS14182 S 14
.875 inch Dia. size
silver plate finish
MS number
2
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