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MS21042 Datasheet

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MS21042 / NAS1291 Series Specications
Nuts, Self-locking, 450°, Reduced Hexagon, Reduced
Height, Ring Base, Non-Corrosion Resistant Steel
35
Size
Dash
No.
Thread a
ABC
D Ed Fe
Max Min Min Max Min Min Min
02 2-56 UNC-3B .167 .137 .138 .106 .086 .045 .019
04 4-40 UNC-3B .206 .176 .171 .142 .112 .050 .028
06 6-32 UNC-3B .244 .214 .207 .168 .138 .055 .039
08 8-32 UNC-3B .290 .260 .244 .194 .164 .060 .041
3 10-32 UNF-3B .330 .290 .277 .220 .190 .065 .043
4 1/4-28 UNF-3B .420 .386 .347 .280 .250 .090 .057
5 5/16-24 UNF-3B .520 .482 .419 .342 .312 .120 .077
6 3/8-24 UNF-3B .620 .575 .491 .405 .375 .125 .089
7 7/16-20 UNF-3B .708 .680 .562 .467 .437 .160 -
8 1/2-20 UNF-3B .814 .786 .633 .530 .500 .225 -
9 9/16-18 UNF-3B .912 .874 .775 .592 .562 .320 -
10 5/8-18 UNF-3B 1.014 .976 .846 .655 .625 .365 -
G
Max Min
.021 .004
.027 .005
.031 .006
.031 .006
.031 .006
.036 .007
.042 .008
.042 .008
--
--
--
--
H
Max Min
.100 .080
.125 .103
.141 .115
.188 .125
.188 .154
.219 .204
.266 .251
.282 .267
.328 .313
.410 .350
.480 .420
.550 .490
J Wc
Min Max Min
Xb
Axial f
Strength
Min, lb
Weight
lb/100
Max
.010 .127 .122 .0025
.010 .158 .150 .003
.010 .190 .181 .003
.015 .221 .213 .003
.015 .252 .243 .003
.019 .316 .304 .003
.023 .378 .367 .004
.030 .440 .430 .004
.035 .504 .494 .004
.040 .566 .556 .004
.045 .692 .680 .004
.050 .755 .743 .004
660
1110
1670
2490
3470
6200
9820
15200
20600
27500
34800
43600
.020
.050
.080
.150
.180
.350
.600
.800
1.30
2.10
3.60
4.50
Wrenching
Torque Test f
Value, in-lb
5
10
20
30
60
150
330
530
825
1125
1550
2000
All dimensions in inches; nuts dash size 7 and larger use NAS1291 prex, stainless steel nuts use NAS1291C designation.
(a) Threads in accordance with MIL-S-7742 before lubrication
(b) Bearing surface shall be square with pitch diameter within X when measured in accordance with MIL-N-25027
(c) Dimension across ats includes deformation of locking device
(d) Minimum length of each wrenching corner
(e) Minimum distance from the washer face of the nut to the beginning of the minimum length E of each wrenching corner
(f) For alloy steel nuts. For A286 nuts multiply these values by .694
Material: Alloy steel or A286 corrosion resistant steel (NAS1291C designation)
Plating: Plain cadmium-plated nuts in accordance with QQ-P-416, Type II, Class 3. Dry lm lubricated nuts in accordance with QQ-P-416. NAS1291C designation
nuts: silver plate per AMS2410
Lubricant: Dry lm lubricant approved in accordance with MIL-N-25027. Other lubricants soluble in the cleaner specied in procurement specication. For USAF ap-
plications, nuts treated with dry lm lubricants shall not be utilized in integral fuel tanks.
Hardness: Rockwell C49 maximum (alloy steel nuts)
Break all sharp edges and remove all hanging burrs and slivers which might become dislodged under usage. Surface roughness in accordance with MIL-STD-10.
Unless otherwise specied the surface roughness shall not exceed 125 uin. These nuts shall be used in accordance with the limitations of MS33588.
Coast Fabrication, Inc. Ph: (714) 842-2603 Fax: (714)847-1824 info@coastfab.com
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Part Number MS21042
Description Nuts
Maker Coast Fabrication
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MS21042 Datasheet PDF






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