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NATIONAL AEROSPACE STANDARD
O COPYRIGHT 2012 AEROSPACE INDUSTRIES A!;SOCIATION OF AMERICA, INC. ALL RIGHTS RESERVED
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-TABLE I DIMENSIONS
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Reproduced By IHS;
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Under Royalty Agreement
CUISTODIAN
NATIONAL AEROSPACI: STANDARDS COMMITTEE
OROCUREMENT
SPECIFICATION
NOTED
'TITLE
scREW, MAC|{INE, PAN HEAD,
MODIFIED, CLOSE TOLERANCE,
SHORT THREAD, OFFSET CRUCIFORM
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NATIO NAL AEROSPACE !'TAN DARD
@ COPYRIGHT 2012 AEROSPACE INDUSTRIES ASSOCIATION OF,AMERICA, INC. ALL RIGHTS RESERVED
NailoNAt nERosp^c( STANDARoS
tASiC
)ART
JMBER
NAS1141
t\ \s1142
t\ \s1143
N \si144
t\ \s1145
NAS1146
t\ \s1147
t\ \s1148
TABLE I _ DIMENSIONS (C(]NTINUED
INSPECTION DATA
FIM VALUES
RECESS GAGE
X z PENETMTION MIN RAISED
Itt tu t2t
t3t TORQUEi METAL
MAX MiN LBF-IN MAX
.005 .0045 ,0040 .0390 ,0285
.005 .0045 .0040 .0470 .0355
,005 .0045 .0040 nq4n ,0415
.006 .0045 ,0030 .0695 .0555
?n
(n
OU
t40
.005
.005
.005
.005
.008 .0060 ,0030 .0860 .0700 220
,005
.009 .0060 .0025 .1030 .08s0 520
.006
.010 ,0060 ,uuz) .1205 1005 750
.007
.010 .0060 .0020 L375 1155 900
.008
TEST VALUES
MIN TENSILE STRENGTH LBF
ALLOY STEEL, TITANIUM, CRES
L6O KST ILTI
1,450
2,240
3.180
5.820
9,200
14,000
18,900
2s.600
MI\TER
ALLOY STEEL - 4140 (UNS G41400) pER M+|-H$!6 AMS634{ ) OR AMS63B2; 4340 (UNS G43400) PER
AMS6415 OR AMS6484; E4340 (UNS G43406) PER M LS-5€0e AMS6415 OR AMS64B4; C R
8740 (UNS G87400) pER MILS€049 AMS|5322, AMS( ;325 0R AMS6327.
CRES - A286 (UNS 566286) pER AM55731, AMS5732, AMS57: 7 0R AMS5B53.
-TTTANTUM 6Al-4V (UNS R56400) pER AMS4928 OR AMS496;
.R
HEAT
TMENT:
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DEVELOP BASIC MATERIAL PROPERTIES AS FOLLOWS, WITH CONTROLS PER AMS2759 FOR ALL )Y
STEEL AND CRES AND AMS-H-81200 OR AMSz8O1 FOR TITAN IUM.
ALLOY STEEL: 160-180 KSI Ftu
CRES: 160-190 KSI Ftu PRECIPITATION HARDENING PER AMSsBs3. /17l
TITANIUM (6AL-4V): 160 KSI Ftu MIN
FII'IISH
ALLOY STEEL - CADMIUM PLATE pER AMS-QQ-P-4:|6, rypE II , CLASS 2; OR
CADMIUM PLATE PER AMS.QQ-P-416, ryPE II, CLAS: ; 2 WITH DULL BLACK CHROMATIC
TREATMENT.
-CRES CLEAN AND PASSIVATE pER AMS2700, METHOD 1, CLASS 4; OR
CADMIUM PLATE pER AMS-QQ-P-416, TypE II, CLAS! ;2,
-TITA,NIUM NONE.
CODE:
DASH NUMBER DESIGNATES GRIP AND LENGTH (SEE TABLE ]
MATERIAL CODE:
DASH DESIGNATES ALLOY STEEL
"E" IN LIEU OF DASH DESIGNATES 4286 CRES
"V" IN LIEU OF DASH DESIGNATES 6AI-4V TITANIUM
FINIISH CODE: FOLLOWS LENGTH DASH NUMBER
ALLOY STEEL:
NO CODE DESIGNATES WPE II PLATING
"8" DESIGNATES TYPE II PLATING WITH DL ILL BLACK CHROMATE
CRES:
NO CODE DESIGNATES CLEAN AND PASSIVI \TE
"P" DESIGNATES TYPE II PLATINIG
Wi
REVISiOI
10
@ corveL :TELY REVIS;ED
NAS1141
THRU NAS1148
USF OF
CONFO
ITEMS I
RELIANCE UPON THIS DOCUMENT OR ANY NATIONAL AEROSPACE STANDARD IS EI\TIRELY VOLUNTARY. AIA DOES NOT QUALIFY SUPPLIERS OR CERNF/
NCE OF ITEMS PRODUCED UNDER NATIONAL AEROSPACE STANDARDS, A]A MAKE!; NO REPRESENTANON OR CLAII4 RESPECNNG (1) THE SUITABILITY OF
ANY PARTICUI-AR APPLICATION OR (2) THE EXISTENCE OF OR APPUCABILITY THERETO OF PATENT OR TMDEMARKS RIGHTS.

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NATT'NAL AERTosPAcE
'TANDARD@ COPYRIGHT 2012 AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA, INC. ALL RIGHTS RESERVED
EMMPLES OF PART NUMBER:
NA.S1144-8
NAS1146E12P
NAS1146V12
NAS1146-12B
.2500-28 BOLT, .5C10 cRIp, ALLOY STEEL, TypE II PLATING
.3750-24 BOLT, ,75;0 cRIp, CRES, TypE II PLATING
.3750-24 BOLT, .750 GRIP, 6At-4V TITANIUM
.3750-24 BOLT, ,75i0 GRIP, ALLOY STEEL, BLACKENED TYPE II PLATING
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NOTES:
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A\
(s)
(6)
(7)
(B)
(s)
(10)
I LLI
(12)
/l 2\
(r4)
/1 q\
(i6)
CoNCENTRICITY: "oD" AND THREAD
WITHIN "X" VAI I IFq FTM Ptr'trCC Tr)
IDITCH DIAMETERS
CIJAII|1 I^'TTUT^I ^I
WITHIN
r rT^,
,'y"
VALUES
FIM.
"oB".-A-.ND^-"gDI .
ABOVE .2500 SIZE.
SHANK STMIGHTNESS: WITHIN "2" VALUES FIM PER INCH oF LENGTH.
RECESS GAGING IN ACCORDANCE WITH NASM33781, EXCEPTAS NOTED.
GRIP LENGTH: FROM
OF THE SHANK.
UNDERSIDE
OF-THE
HEAD
TO
TI-IE
END
OF THE
FULL CYLYNDRICAL
PORTION
REMOVE ALL BURRS AND SHARP EDGE:S.
RECESS TORQUE TEST: BOLT RECESS SHALL BE TORQUE TESTED IN BOTH INSTALLATIO*S
TtiREMOVAL DIRECTIONS WITH NASM33ZB1 DRIVER. APPLY TABULATED TORQUE IN CLOCKWISC
DIRECTION WITH MAXIMUM END LOAD OF 20 POUNDS. PARTS ARE ACCEPTABLE
AT EDGE OF RECESS DOES NOT EXCEE:D TABULATED VALUES. APPLY TABULATED
IF MISED METAL
ToRQUE IN
COUNTER-CLOCKWISE DIRECTION WTTH MAXIMUM END LoAD oF 40 PoUNDS. PARI.S ARE
METAL.ACCEPTABLE IF TORQUE IS ATTAINED WITHOUT RESTRICTION ON MISED
I
BEARING SURFACE SQUARENESS: WITHIN .OO3 FIM oF SHANK DIAMETER. I
FoR .RES, MAGNETIC
.;HALL BE LESS rHAN 2.0 (ArR
H = 200 OERSTEDS US'IENRGMAEMAABGILNITE'TIC PERMEABILIry INDICAToR
3. | - -METHOD
= r.ol r[n A FrELD
ern nsr{ n: +itm'- +'-'T'irR',''tE,'N'iGrlTrH
I
FED-STD-H28. I iTENSILE STRESS AREA USED FOR CALCULATIoN oF ULTIMATE TENSILE STREilGTH
oN
VALUES II
BflsED
I
UNPLATED SHANK ''@D" SHALL BE THE SAME AS THE AFTER PLATE DIMENSION.
THREADS IN ACCORDANCE WITH AS8879,
DIMENSIONS IN INCHES AND APPLY AFTER FINISH UNLESS OTHERWISE SPECIFIED.
FOR DESCRIPTION OF STATUS NOTES:JEE NAS38O,
SURFACE ROUGHNESS: "9D", UNDERSIDE OF HEAD, SIDES AND ROOT oF I
MICROINCHES Ra; ALL OTHER SURFACES: 125 MICROINCHES Ra PER ASME
+TPHT*-FING
DIMENSION]NG AND TOLEMNCING PER ANSI Y14,5M-1982.
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NATIONAL AE ROSPACE !sTAN DARD
O COPYRIGHT 2012 AEROSPACE INDUSTRIES ASSOCIATION OF AMERICAV INC' ALL RIGHTS RESERVED
NAT'ONAI A;RO5PACE SIANDAT.DS
THE EFFECT OF COLD WORK AND AGING INDUCED DURING THE MANUFACTURING CYCLE MAY
INCREASE THE ULTIMATE TENSILE VALUE OF THE FINISHED PART. BUT THIS SHALL NOT EXCEED 1.3
TIMES THE SPECIFIED MINIMUM TENSILE VALUE.
FAS'IENERS MANUFACTURED PRIOR TO (INSERT DATE) WHICH MET THE REQUIREMENTS FOR
RECESS TORQUE VALUES AT THE TIME OF MANUFACTURE MAY BE SUPPLIED TO DEPLETION.
END SHALL BE FLAT AND CHAMFERED, CHAMFER DIMENSION PLUS INCOMPLETE THREADS SHALL
NOT EXCEED TWO PITCHES.
HEAD MARKING: BASIC PART NUMBER, APPLICABI-E DASH NUMBER, MANUFACTURER,S TMDE MARK,
AND THE MATERIAL CODE WHERE APPLICABLE TO INDICATE CRES OR TITANIUM. MISED OR
DEPRESSED ,O1O MMIMUM, LOCATION OPTIONAT-. SIZES .1380 AND .1640 ONLY MAY BE MARKED 1
AND 2, AS APPLICABLE, PLUS DASH NUMBERS (AND MATERIAL CODE, IF APPLICABLE),
r) THIS STANDARD TAKES PRECEDENCE OVER DOCLIMENTS REFERENCED HEREIN.
2) UNLESS OTHERWISE SPECIFIED, PART INVENTORY MANUFACTURED TO PREVIOUS REVISIONS OF
THE APPLICABLE DRAWING OR SPECIFICATION MAY BE PROCURED AND USED UNTIL STOCK IS
DEPLETED.
UNLESS OTHERWISE SPECIFIED HEREIN, REFEREI'ICED DOCUMENTS SHALL BE THE ISSUE IN EFFECT
ON DATE OF MANUFACTURE. HOWEVER, EXISTIN(3 MATERIAL INVENTORY CERTIFIED TO A PREVIOUS
REVISION OF THE APPLICABLE MATERIAL SPECIF]CATION(S) IS ACCEPTABLE FOR USE UNTIL
DEPLETION.
DASH NUMBER iNDICATES GRIP LENGTH IN .0625 INCREMENTS. INTERMEDIATE OR LONGER
LENGTHS MAY BE SPECIFIED BY USE OF WHOLE DASH NUMBERS ONLY.
ENT SPECIFICATION:
NAS4002, NAS4003 AND NAS4004, EXCEPT AS NO'IED:
RECESS STRENGTH AND TENSILE LOAD VALUES AS TABULATED HEREIN. COLD WORKING HEAD TO
SHANK AND FATIGUE REQUIREMENTS ARiE NOT APPLICABLE FOR ALLOY STEEL AND CRES
SCREWS. FOR TITA}JIUM SCREWS, FATIGUE AND FILLET ROLLING REQUIREMENTS ARE
APPLICABLE PER NAS621,
NAS1141
-TABLE II GRIP DASH NUI4BERS
NOMINAL LENGI-H FOR SIZES LISTED
NAS1142
NAS1147
.2s0
.312
.375
o
@E& cou
LY REVI:JED
REVISION
10
NAS1141
THRU NAS1148
OR RELIANCE UPON THIS DOCUMENT OR ANY NAT1ONAL AEROSPACE STANDARD IS E|NTIRELY VOLUNTARY. AIA DOES NOT QUALIFY SUPPLIERS OR CERTIFY
NCE OF ITEMS PRODUCED UNDER NATIONAL AEROSPACE STANDARDS, AIA MAKES NO REPRESENTATION OR CLAIM RESPECTING (1) THE SUITABiLITY OF
ANY PARTICULAR APPLICANON OR (2) THE EXISTENCE OF OR APPLICABILITY THERETO OF PATENT OR TMDEMARKS RIGHTS.

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TABLE II _ GRIP DDAASSI-III NUMBERS ]ONTINUEt
DASH NOMINAL
NOt\IINAL LENGTI- FOR SIZES LISTED
NO. L]KIT I\45I1+I NAS1142 NAS1143 NAS1144 NAS1145 NAS1146 NAS1147 NASl 148
IJ
.B12
1.088
1.088
1.OBB
Lr28 L,!6/
1,203
1.265
L.265
t4
.875
r.L5r
I.IJI
1.151
1.191
1,250
t.266 1.328
1.328
IJ
.938
T.2T4 t.214 1.2t4 t.254 I.JIJ
t.329 1,391
1.391
IO
1,000
t.276
r,z/o
r.276
I.JIO
t.375 1.391
1,453
7.453
17 1.062
1,338
1,338
1.338
1 ?7R
L.437
1.453
1.515
18 r. LZJ
1.401
1.401
1.401
t.447 1.500
l.J l_o
1.578
1.578
19 1.188
1.464
7.464
t.464
1.504
1.563
L.579
I.64L
7.64r
2U 1.250
1.526
L.526 1.526
1,566
r.625
1.641
r.703
L.703
oo
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z>
6Z
27 L.3T2 1,s88 1.58B 1.588 t.628 1.687 L,/U3 1.765 L.765
22 ]-375 1.651 1.651 T.Of,I
1.691
L./JU
t.766
1.828
1,828
23
1.438
]-714 L,7T4 t.7I'4
1.754
1.813
1.829
1,891
1.891
24 1.500
L./ /O
L,/ /O
1 -7-78
1.816
1.875 1.891
1.953
1.953
a=<6
;i<
z5 I. JOZ
1,838
1.838
i.83i8
1.878
L.Y5 /
2.015
2.015
26 1.625 1.901 1.901 1.901 1.947 2.000 2.016 2.078 2.078
27 1,688
1.964
t.964
7.96'+
2.004 2.063
2.079 2.I4L
2.147
28 I,/7U
2.026
2.026
2.0213
2.066
z, Lz)
2.74L
2.203
2.203
29
1.812
2,088
2.088
2.0813
2.t28
2.187
2.203 2.265
2.165
30 L.875 2,T5L Z.IJI
2.151 2.t91 2.250 Ltoo 2.328 2.328
JI
1.938
2.214 2.214
z,zr.+
2.254 2,5 L5
2.329 2.391 2.397
32 2.000
2.276
2.276
2.271)
2.375
2,59 r
2.4s3
2.453
34
2.r25
2.401
2.401
2.40'.1
2.441 2.500
Z.J IO
2.578 2.578
36 2.250 2.526 2.526 z,Jzl) 2.566 z,o25 2.64t 2.703 2.703
JO
2.651 z,o5r
2.69r 2.750 2.766 2.828 2.828
40
2,s00
z./ /o
2.776
2.776
2.816
2.875 2,891
2.953
2.953
+z 2.bt5
2.901
2.901
2.90ri
2.941 3.000
3.016
3.078
3.078
b
:l
44
46
48
Z./JU
2.cc75
3.000
3.026
J.IfI
-? )-7A
J.UZO
3.276
3.026
J, 15l.
3.276
3,066
3.191
J,JIO
5.LZJ
3.250
3.37s
3.I4I
3.266
3.391
3.203
3.328
3,453
3,203
3.328
3.453
50
3.r2s
3.40L 3,401
3.401.
3.44L
3.500
3.516
3.578
3.578
;!t-
oE
52
3,250
3.526
3.526
3,526
3.566
3.62s
3.641 3.703
3.703
54
3.375
3.651
5.b51
J.05L
3.691
3.750
3.766
3.828
*?.828
56 J.5UU
5,/ /O
3.776
3.77e)
3.816
3,875
3.891
3.953
3.9s3
zIF
E
X
58
5,625
3.901
3.901
3.901
3.94r
4.000
4.016 4.078
4.078
60 3.750
4.026
4.026
4.02e;
4.066
.+, LZ5
4.t41
4.203
4.203
62 3.875
4.L51
4.151
4.I51
4.191
4.250
4.266
4.328
4 ?)R
z
64 4.000
4.276
4.276
4.276,
4.316
4.375
4.391
4.453
4.453
IF
tduFi
z
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F
u
gu
66 4.L25 4.40L 4.401 4.407 4.44L 4.500 4.516 4 q7R 4.578
68 4.250 4.526 4.526 4.526 4.566 4.625 4.641 4.703 4.703
4.375
4.65L 4.65t 4.651
4.69r 4.750 4.766 4.828 4.828
72
74
76
4.500
4.625
4]50
4.776
4.901
5.026
4.776
4.901
J.UZO
4.776
4,901
5,026
4.816
4.94r
5.066
4.875
s.000
5.125
4.891
5.016
5.141
4.953
5,078
5.203
't,vJJ
5.078
5,203
u
oIUE
@
J
78
4.875
5.151
J, 15I
5.151
f,, IYI
s.250
5.266 5.328 5.328
80
82
5.000
5.t25
5.276
5.401
5.276
5.401
5.276
5.401
5,316
5.44t
5.375
5.500
5.391
5,516
J..t)J
5.578
5,4s3
5.578
I
",U
z3
84
5.s26
5.526
5,526
5,566
5,625
5.641 5.703
5.703
B6
5.375
5.651
5,651
5,6s1
5.691
5.7s0
5.766
5.828
5.828
88 5,500
5.776
5.776
5.776
5,816
s.875
5.891
).v5J
5.9s3
odu>
90 J.OZJ
5,901
5.901
s.901
5.94r 6.000
6.016
6.078 6.078
92
5.750
6.026
6.026
6.026
6.066
6.125
6.14I
6 )n1,
6,203
94 5.875
O.15I
o.15r
6.191
6.250
6.266
6.328
6.328
96 6.000
o,z/o 6.276 o,z/o 6.316
6.391 6.453 6.453
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