MS51991D
TABLE III. Fine Internal and Fine External Threads.
DASH NO. |
A INTERNAL THREAD UNJF-3B |
B EXTERNAL THREAD SEE THREAD NOTE |
C |
D ±.015 |
0E +.005 -.004 |
0F +.007 -.002 |
0G |
0H |
J |
K° +2° -1° |
L ±.015 |
T ±.015 |
LOCK RING PART NO. (REF) SEE NOTE 15 |
|||
SIZE |
MINOR DIA (REF) |
SIZE |
PITCH DIA |
MINOR DIA |
||||||||||||
-311 |
.5625-18 |
.5166 .5084 |
.8750-14 |
.8316 .8291 |
.7904 .7786 |
.589 .574 |
.160 |
.783 |
.820 |
.728 |
.768 |
30 |
111° |
.880 |
.620 |
MS51990-111P |
(a) -312 |
.6250-18 |
.5788 .5709 |
1.0000-14 |
.9566 .9541 |
.9154 .9036 |
.685 .675 |
.160 |
.894 |
.932 |
.850 |
.882 |
38 |
102° |
1.000 |
.740 |
MS51990-112P |
-312.1 |
.6250-18 |
.5788 .5709 |
1.0000-12 |
.9491 .9466 |
.9010 .8878 |
.685 .675 |
.160 |
.894 |
.932 |
.850 |
.882 |
38 |
102° |
1.000 |
.740 |
MS51990-112P |
-313 |
.7500-16 |
.6977 .6892 |
1.1250-12 |
1.0741 1.0716 |
1.0260 1.0128 |
.777 .762 |
.160 |
1.029 |
1.074 |
.950 |
1.002 |
36 |
111° |
1.120 |
.800 |
MS51990-113P |
-314 |
.8750-14 |
.8152 .8055 |
1.2500-12 |
1.1991 1.1966 |
1.1510 1.1378 |
.904 .889 |
.190 |
1.169 |
1.214 |
1.127 |
1.127 |
48 |
90° |
1.250 |
.900 |
MS51990-114P |
-315 |
1.0000-12 |
.9298 .9189 |
1.3750-12 |
1.3241 1.3216 |
1.2760 1.2628 |
1.029 1.014 |
.190 |
1.273 |
1.318 |
1.202 |
1.252 |
42 |
111° |
1.380 |
1.020 |
MS51990-115P |
(a) Inactive (not to be used for new design)
TABLE IV. Interchangeability - see note 14
Part Numbers |
|||||
Cancelled (CRES 17-10P) |
New (CRES A-286) |
Cancelled (CRES 17-10P) |
New (CRES A-286) |
Cancelled (CRES 17-10P) |
New (CRES A-286) |
MS51991 C102 C103 C104 C105 C106 C107 C108 C109 C110 |
MS51991 E102 E103 E104 E105 E106 E107 E108 E109 E110 |
MS51991 C202 C203 C204 C205 C206 C207 C208 C209 C210 |
MS51991 E202 E203 E204 E205 E206 E207 E208 E209 E210 |
MS51991 C311 C312 C312.1 C313 C314 C315 |
MS51991 E311 E312 E312.1 E313 E314 E315 |
NOTES:
1. Material: Steel, carbon, composition C117 in accordance with SAE AIR4127.
Steel, corrosion-resistant, Type A286 (UNS S66286) per SAE AMS5731, SAE AMS5732, SAE AMS5734 or SAE AMS5737.
2. Protective coating: Steel, carbon shall be cadmium plated in accordance with SAE AMS-QQ-P-416, Type II, Class 3.
Steel, corrosion-resistant, shall be passivated in accordance with SAE AMS2700.
Steel, corrosion-resistant, with internal thread lock for aerospace applications shall also be solid film lubricant coated per SAE AS5272 Type I1.
Steel, corrosion-resistant, with internal thread lock for non-aerospace applications shall also be solid film
lubricant coated per MIL-PRF-460102.
3. Surface roughness: Machine surfaces shall be 125 microinches in accordance with ASME B46.1 except serrated collar.
4. Threads: The external thread has a special pitch diameter and minor diameter which installs into a national class 3 tapped hole. Threads also shall be in accordance with procurement specification.
1SAE AS5272 Type 1 lubricant is technically equivalent to MIL-L-46010 Type I lubricant which superseded MIL-L-8937 lubricant used in previous revisions.
2MIL-PRF-46010 lubricant is lead (Pb) free and is not technically equivalent to MIL-L-46010 Type I lubricant which superseded MIL-L-8937 lubricant used in previous revisions. Use of MIL-PRF-46010 in aerospace applications must first be validated.
3
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