MS21042

NATIONAL AEROSPACE STAN DARD
O COPYRIGH'I'2013 AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA, INC, ALL RIGHTS RESERVED
DESJGN OF WRENCHING PAD FACES BETWEEN WRENCHING CORNERS IS
OPTIONAL IF THE WRENCH]NG CORNERS ARE WITHIN THE L]MiTS OF E, W
AND C BEFORE LUBRICATION AND THE UMIT OF THE AREA BETWEEN THE
CORNERS IS WITFIIN THE MAXIMUM LIM]T OF W FOR THE E LENGTH OF
WRENCHING CORI{ERS, BEFORE LUBRICATION
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DISTORTION
PERMISSiBLE IN
LOCKING AREA
TABLE I
SIZE THREAD
DASF
NO,
/3t
QIA
QD
@B
E
MAX MIN MIN
02
04
06
F
08
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UNJC-38
.LL20-40
UNJC-38
.1380-32
UNJC.3B
.L640-32
UNJC-38
.1900-32
.t6i
UNJF-38
.3750 24
UNJF.3B
t6t t7t
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DIMENSIONS OD & G
DIMENSIONS
H
J
W
X
/VRENCHINC
MIN
tst
t4t
TORQUE
IN-LBF MIN
MAX MIN \4AX MIN
\4A) MIN
.LJ/ .138 .106 .086 .04s ,01s .02L ,004 .100 ,080
.Lzi .L22 ,002s
.L4I 1i5
244 .2Lz .207 .16€ .138 .055 039
.29C ,26( .244 .L94
29C .277
?RF
.220
't
,19C .181
.
or 065 .043
.22L .2r
LZJ
.003
.34i .280 .250 .090 .057 .03€ 00, .2t9 .204 .UI:' .316 .304
.575 .49L .405 .375 .L25 089
5
660
.020
10
1,1 1o
,0s0
20
L,670
.080
30
2Ael
.150
OU
3,470
.180
f,
1s0
6,20Q
.350
i:i
330
9,820
.600
530
15,200
.800
E
.252 .24
.266 .251 .023 ,378 .367
.042 ,00€
.OZU
t9l
.01
.t54
,520 .482 .4L9 .342 .3L2 .LaC 077
WT
O
N
.t64 .060 .04L .031 .006
.188
,33C
AXIAL
STRENGTH LBSi 10C
LBF MIN
MAX
tB/
20( .L76 .L7L .L42 .TL2 05c n)9 .027 .005 .L2s .103 .010 .15t .150
UNJF-3B
.2500- 28
42C
UNJF-38
.3125-24
-
U
MIN MIN
MIN
.0860-56
F
COUNTERSINK,
COUNTERBORE, OR
MDIUS RELIEF TO
THREAD WITHIN THE
LIMITS OF
.004
,282 .267 .030 .440 .430
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THE INITIAL REL.EASE OF THIS DOCUMENT SUPERSEDES MS2IO42, REVISION
PROCUREMENT
SPECIFICATION
NASM25O27
M.
PART NUMBERS REMAIN M527042.
CUSTODIAN
REVISION
NATIONAL AEROSPACE STANDARDS COMMITTEE
1
TITLE
CLASSIFICATION
PART STANDARD
NtuT, SELF-LOCKING,450o F, REDUCED HEXAGON,
REDUCED HEIGHT, RING BASE, NON-CORROSTON
RESISTANT STEEL
NASM21042
SHEET 1 OF 4
USE OF OR RELIANCE UPON THIS DOCUMENT OR ANY NATIONAL AEROSPACE STANDARD IS ENTIRELY VOLUNTARY. AIA DOES NOT
QUALIFY SUPPLIERS OR CERTiFY
CoNFoRNIANCE OF ITEMS PRODUCED UNDER NATIONAL AEROSPACE STANDARDS. ALA MAKES NO REPRESENTATION OR CLArM RESPECTING (1) THE SUITABILITY
OF
]TEIVIS FOR ANY PARTICULAR APPLICATION OR (2) THE EXISTENCE OF OR APPLICABILITY THERETO OF PATENT OR TMDEMARKS RIGHTS.
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NATIONAL AEROSPACE STANDAR.D
@ COPYRIGHT 2013 AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA, INC. ALL RIGHTS RESERVED
MATERIAL:
STEEL: UNS G10350 (AISI C103s) PERAMS5080, AMS-QQ-S-700
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UNS
UNS
UNS
UNS
UNS
UNS
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:
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E
rAN
G10420
G10500
G40270
G40370
G86300
G87400
(ArSr C1042)
(AISI 1050)
(AISI
(AISI
(AISI
(AISI
4027)
4037)
8630)
8740)
PER
pER
pER
pER
pER
AMS5085
ASTM A322
ASTM 4322, 4108 A33+, 4519, A547, AMS6300
AMS62B0, AMS6350 6355, AMS6360 653g, A|N4S6550
AMS6322, AMS6323, AMS6325, AM56327, AI\456358
HEAT TREATMENT:
gER
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HH<
DEVELOP BASIC MATERIAL PROPERTIES WITH CONTROLS PER AMS2759, HARDNEISS TO 49 HRC
MAX.
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a=6
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FINISH:
PLATING, CADMIUM PLATE IN ACCORDANCE WITH AMS-QQ-P-416, TYPE II, CLASS 2,
FOR DRY FILM LUBRICATED NUTS, TYPE AND CLASS ARE OPTIONAL IF THE NUTS I\4EET THE SALT
SPMY REQUIREMENTS OF AMS-QQ-P-416, TYPE II.
LUBRICATION:
DRY FILM OR NON-DRY FILM IN ACCORDANCE WITH NASM25O27. OTHER LUBRICA,NTS SHALL BE
SOLUBLE IN THE CLEANER SPECIFIED IN PROCUREMENT SPE:CIFICATION.
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CODE:
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THE PART NUMBER SHALL CONSIST OF THE BASIC MS NUMBER FOLLOWED BY A DIASH NUMBER
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LETTER"L" BEFORE FIRST DASH NUMBER DESIGNATES DRY FILM LUBRICATED NUTS,
FROM TABLE
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EXAMPLES OF PART NUMBER:
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M52I042L4.2500-28 NUT, CADMIUM PLATED, DRy FILM LUBRICATED.
MS2IO42-4.2500-28 NUT, CADMIUM PLATED, NOT DRY FILM LUBRICATED.
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(1)
DIMENSIONS IN INCHES AND APPLY AFTER FINISH UNLESS OTHERW]:SE SPECIFIED.
(2)
DTMENSTONS AND TOLERANCTNG pER ASME y14.5M-1982.
/3/
THREADS BEFORE LUBRTCATION pER ASBB79.
I4I
BEARING SURFACE SHALL BE SQUARE WITH PITCH DIAMETER WITHII\ "X" WHEN ]VIEASURED IN
ACCORDANCE WITH NASM25O27.
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NASl"l21042
REVTsED
usE oF oR RELIANCE UPON THIS DOCUMENT OR ANY NATTONAL AEROSPACE STANDARD IS ENTTRELY VOLUNTARY.
CONFORMANCE OF ITEMS PRODUCED UNDER NATIONAL AEROSPACE STANDARDS. AIA MAKES NO REPRESENTATION
AIA DOES NOT QUALIF/ S;UPPLIERS OR CERTTFY
OR CLAIM RESPECTING
ITEMS FOR ANY PARTICUI.AR APPLICATION OR (2) THE EXISTENCE OF OR APPLICABIL]TY THERETO OF PATENT OR TMDEMARKS RIGHTS.
(
1) THE SUITABILITY OF
NATIONAL AEROSPACE STAN DARD
O COPYRIGHT 20I3 AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA" INC, ALL RIGHTS RESERVED
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DIMENSIONIS APPLY PRIOR TO DEFORMATION OF LOCKING FEATURE.
/61
MINIMUM LENGTH OF EACH WRENCHING CORNER.
17I
MINIMUM D]ISTANCE FROM THE WASHER FACE OF THE NUT TO THE BEGINNING OF THE MINIMUM
O
LENGTH
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NUT SHALL I]E TESTED FOR WRENCHING TORQUE BY THE USE OF A BOX OR SOCKET WRENCH.
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TEST BOLTS SHALL BE 180,000 pSI MrN.
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EACH WRENCHING CORNER.
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(10)
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116'=
*E'OF
SURFACE TEXTURE: SURFACE TEXTURE IN ACCORDANCE WITH ASME 846.1 UNLESS oTHERWISE
SPECIFIED THE SURFACE TEXTURE SHALL NOT EXCEED 125 MICROINCHES,
(11)
REMOVE ALt. SHARP EDGES AND BURRS.
(12)
THESE NUTS SHALL BE USED IN ACCORDANCE WITH THE LIMITATIONS OF NASM3358B,
(13)
(14)
(15)
(16)
NASM21042 SUPERSEDES: AN363, AN364, AN365, MS20364, MS20365, MS21040, NAS679 IN pART,
NAS1O21 IN PART, NAS1O22 IN PART, NAS1291 IN PART.
THIS STANDARD TAKES PRECEDENCE OVER DOCUMENTS REFERENCED HEREIN.
UNLESS OTHERWISE SPECIFIED, ISSUES OF R.EFERENCED DOCUMENTS ARE THOSE IN EFFECT AT
THE TIME OF SOLICITATION.
UNLESS OTHERWISE SPECIFIED HEREIN, REFERENCED DOCUMENTS SHALL BE THE ISSUE IN EFFECT
ON DATE OF MANUFACTURE. HOWEVER, EXISTING MATERIAL INVENTORY CERTIFIED TO A PREVIOUS
REVISION OF THE APPLICABLE MATERIAL SPECIFICATION(S) IS ACCEPTABLE FOR USE UNTIL
DEPLETION.
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ILTI
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MARKING: MANUFACTURER'S IDENTIFICATION REQUIRED FOR SIZES .T640-32 AND LARGER. SIZES
.1380-32 AND SMALLER AT MANUFACTURER'S OPTION (POSITION OPTIONAL).
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NASM21042
USE OF OR RELIANCE UPON THIS DOCUMENT OR ANY NATIONAL AEROSPACE STANDARD IS ENTIRELY VOLUNTARY. AIA DOES NOT
QUAUFY SUPPUERS OR CERTIFY
CoNFoRMANCE OF ITEMS PRODUCED UNDER NATIONAL AEROSPACE STANDARDS. AIA MAKES NO REPRESENTATION OR CLAIM RESPECTING (1) THE SUTTABILmY
OF
ITEMS FOR ANY PARTICULAR APPLICA IION OR (2) THE EXiSTENCE OF OR APPLiCABILITY THERETO OF PATENT OR TMDEMARKS RIGHTS.
*ee
&55*{:t4rtQE
NATIONAL AEROSPACE STANDARD
@
COPYRIGHT 2013 AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA, INC, ALL RIGHTIS RESERVED
TABLE
II -
INTERCHANGEABILITY TABLE
CANCELLED AND INACTIVATED PART NUMBERS
AN363 AN364 AN365
MS20364 MS20365 MS21040
NAS679
NAS
021
NAS1022
a
z
o
-440C
e
u
-440C
-04
104
E
z
-632
tr
o
-632C
-448C
-632C
-640C
-640C
-832C
-6321
-06
=Aa
A6'=,
*=6
-832C
-836C
<=<
-428
-428C
-518
-524
-616
-624
XO6W, XO6 AXO6
AXO6
-832C
-832C
-08
A06
A06
XOBW. XOB AXOB
A06
AXOS
A08
AOB
A08
-524C
-428C
-518C
-524C
-06
MS21042106
XOB
M521042-08
-08
MS21042108
-1032C
-3
X3W, X3
L3
A3
AX3
AX3
X3
MS21042-3
-3
MS2104213
NONE
-428C
-428C
A3
-4
X4W. X4
L4
A4
-5
AX5
L5
X5
A5
-6
X6
AX6
L6
A6
AX4
A3
AX4
A4
A4
x4
MS2t042-4
-4
MS2L042L4
X5
M521042-5
-5
MS2104215
X6
MS2L042-6
M52104216
NONE
-524C
-624C
-624C
-524C
AX5
A5
A5
NONE
-624C
-624(
AX6
A6
A6
-720C
-820C
AX7
A7
-B20C
AXB
AB
-918C
-918C
AX9
A9
-101BC
-1018C
-L2L6C
-t2t6c
uEE
.L4I4C
-t4L4C
-1614C
o!
-1614C
-1812C
-20r2c
-2072C
>=
EY
5x
M521042-06
-616C
-720C
*H
x06
ttts2t042-04
NONE
-1032C
L7
u<o
tv1s2r042L04
NONE
-7
ts
x04
-04
-420C
-420
n:t=4
MSZLO42LO2
-836C
-7024
-t024c
-7032 -1032C -1032C
9.
A04
MS2r042-02
-02
NONE
108
hein
5lN
oo<
-832C
A04
SUBSTITUTIVE
PART NUMBERS
NONE
-632C
106
Ua
x04w. x04 AX04
NAS129i
x02
-1B12C
AXlO 410
AX12 ALz
AX14 A14
AX18 A1B
AX2O A20
-6
NAS679X7
NAS679A7
SEE NASM21245
SEE NASM21245
SEE NASM21245
SEE NASM21245
SEE NASM21245
SEE NASM21245
NAS1O22A17
SEE NASM21245
SEE NASM21245
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REVISION
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REVTsED
|NASfrl21042
SHEET 4
USE OF OR RELIANCE UPON THIS DOCUMENT OR ANY NATIONAL AEROSPACE STANDARD IS ENTIRELY VOLUNTARY. AIA DOES NOT QUALIFY SiUPPUERS OR CERTIFY
CoNFoRMANCE OF ITEMS PRODUCED UNDER NATIONAL AEROSPACE STANDARDS. ALA MAKES NO REPRESENTATION OR CLAIM RESPECTING (1) THE SUITABILITY OF
ITEMS FOR ANY PARTICULAR APPLICAT]ON OR (2) THE EXISTENCE OF OR APPLIOqBTLITY THERE-TO OF PATENT OR TMDEIYARKS RIGHTS.