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'TANDARD ffijBI
*ArroNAL AEROSPACE
NATIONAL
AERospAcE STANDARD
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O COPYRIGHT 2009 AEROSPACE INDUSTRIES ASSOCIATION
OF AMERICA,
INC, ALL RIGHTS
RESERVED
N#ros6L afBltsF{c€ siaNFnxes
FED. SUPPLY CLASS
5305
WHEN SELF-LOCKING ELEMENT IS SPECIFIED:
HEAD MARKING OF A MINIMUM OF SIX (6)
DOTS, MISED OR DEPRESSED,IS REQUIRED.
TOP OR SIDE LOCATION OPTIONAL.
(scREW SrZES 04 AND LARGER)
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E
300
L
SHAPE OF SOCKET
To 450
(f)
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MIN,
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IDENTIFICATION
*=6
AZ
t
SEE NOTE (e)
v9r
EEE
@B
FOR NUMBER OF HOLES,
sEE NOTE (d)
TABLE
NOMINAL
stzE
DASH
THREAD
SIZE
NO.
F
au
OI
UF
MAX,
01
02
03
04
06
.0730-64
.0860-s6
.0990'48
OB
.L640-32
.1900-24
120-40
.1380-32
.1
oq
Sx
=E
oo
6Z
d<
<E
dF
4
.2500-20
5
.3125-18
6
.3750-16
L
PLAIN OR KNURLED HEADS OPTIONAL
I
H
S
J
T
HEAD
HEAD
WALL
CHAMFER
HEIGHT
SOCKET
SIZE
KEY
DIAMETER
HEAD
SIDE
HEIGHT
:NGAGEMEN.l
THICKNESS
OR MDIUS
MIN.
MIN.
MAX.
NOMINAL
.062
.031
.025
.078
.038
.029
.003
.003
.003
.005
,005
.005
.00s
.008
.008
.008
.010
.010
.010
.010
MAX.
MIN.
.1 1B
r72
.073
.070
.140
1?4
.086
.099
.083
.095
MIN.
.066
.077
.089
.2435
N
n?4
.f/o
7L2
.1UU
.IUL
.078
.094
.o44
.-tdJ
.051
N?R
.226
.218
-t 5aJ
. -t
5rt
.t24
.109
.064
n47
.270
.262
.164
.148
.IAI
.JIZ
.19U
.077
.090
.065
.250
.244
.3053
.3678
.375
.469
.562
.303
.365
.457
.s50
.159
.185
.312
.375
.120
.ttl
119
1|lz
t43
.4294
.655
.642
.750
72F
.213
.245
166
.625
.4979
,6163
.937
1.125
.500
.307
I.IO7
r.3L2
r.295
.370
.432
.238
.285
.333
1.500
1,87s
L.479
1.852
.625
. /5tJ
.750
.875
2.250
2.224
.L64
.190
.250
.312s
.375
.4375
4375-L4
.500
L2
.750
.7406
L4
.8750-9
.875
IO
1.0000-B
L.2500-7
1.5000-6
1.000
1.250
1.500
.8647
.9886
1.2336
1.4818
20
24
K
MiN,
.5000-13
,6250-1 1
.7500-10
10
s+
MAX.
7
z6
UF
t'l
zYl
<ii
naa
.086
.099
.LL2
.138
M (a)
FILLET (9)
MIN,
.0695
.0822
.0949
.1075
.L329
.1585
.1840
B
Za
ffi
9s
D
BODY
DIAMETER
l* * ,0,
THREAD SIZE
W
.IOI
154
.L77
.22s
.188
.281
.ZJU
4?7
.306
.368
.430
.500
.492
.616
.450
.562
.740
.67s
.854
.988
./a
.92I
.750
.875
1.000
1.250
1.500
L.236
1,485
15b
Lt
.375
.375
-5
.394
.900
1.125
1.350
1.000
-
.495
.ozu
-
/+5
190
.UI5
.015
.015
"380
.475
.570
.U15
o=
oi#
o
N
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Reproduced By IHS
With The Permission Of AIAJNAS
Under Royalty Agreement
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THIRD
CUSTODIAN
ANGLE
PROJECTION
11
PROCUREMENT
TITLE
SPECiFICATION
SCREW, CAP, SOCKET HEAD, UNDRILLED AND DRILLED, PLAIN AND
SELF-LOCKTNG, ALLOY STEEL, CORROSION-RESISTANT STEEL AND
HEAT-RESISTANT STEEL, UNRC-3A AND UNRC-2A
CLASSIF]CATION
PART STANDARD
E
d
REVISION
NATIONAL AEROSPACE STANDARDS COMMITTEE
NOTED
INAS1352
SHEET 1 OF 5
USE OF OR REUANCE UPON THIS DOCUN4ENT OR ANY NATIONAL AEROSPACE STANDARD I5 ENTIRELY VOLUNTARY. AIA DOES NOT QUAUFY SUPPUERS OR CERTIFY
CONFORT4ANCE OF ITEMS PRODUCED UNDER NATIONAL AEROSPACE STANDARDS, AIA [4AKE5 NO REPRESENTATION OR CLAI[4 RESPECNNG (1) THE SUITABIUTY OF
1TEMS FOR ANY PARTICULAR APPUCATTON OR (2) THE EXISTENCE OF OR APPUCABILITY THERETO OF PATENT OR TMDEMARKS RIGHTS.
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NATIONAL AEROSPACE STANDARD
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@ COPYRIGHT 2OO9 AEROSPACE
INDUSTRIES ASSOCIATION OF AMERICA, INC, ALL RIGHTS RESERVED
TABLE
II
SAFEry WIRE HOLE WHEN SPECIFIED
MINIMUM BREAKING STRENGTH (POUNDS)
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(A)
MIN. (5 THREAD PITCHES) = REGION OF MINIMUM ENGAGEMENT WITH FULL FEMALE THREAD REQUIRED TO
M EET MIL-DTL-18240 REQUIREM ENTS,
LOCKING ELEMENT WITHIN ''M'' REGION MUST DEVELOP REQUIRED TORQUE WHEN TESTED IN ACCORDANCE
WITH MIL-DTL-18240,
LENGTH OR DIAMETER OF LOCKING ELEMENT MAY BE MORE OR LESS THAN ''M'' PROVIDING ALL OTHER
''MU
REQUIREMENTS ARE MET.
(b)
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SCRHWS WHICH HAVE A LENGTH LESS THAN THE MINIMUM BASICTHREAD LENGTH, SHALL BE THREADED AS
CLOSE TO HEAD AS PMCTICABLE, FOR SCREWS WHICH HAVE A LENGTH GREATER THAN THE IVIINIMUM BASIC
THRI-JD LENGTH, THE BODY AND GRIP LENGTH SHALL BE IN ACCORDANCE WITH ASME 818.3.
DRILLED HOLE DATA IN ACCORDANCE WITH PROCUREMENT SPEC FF-S-86.
PARTS SHALL HAVE DRILLED HEADS IF SPECIFIED BY CODE H.
scREW SrZES 04 AND 06 SHALL HAVE TWO (2) DRTLLED HOLES SPACED 180o.
scREW SIZES 08 THRU 16 SHALL HAVE SrX (6) DRILLED HOLES SPACED 600.
(DRTLLED HOLES NOT APPLICABLE TO SCREW SIZES BELOW 04 AND ABOVE 16).
IDENTIFICATION LETTER ''N" IMPRESSED ON THE TOP OR SIDE OF THE HEAD, FOR SCREW SIZES 04 AND LARGER
ONLY, TO DENOTE HEAT-RESISTANT STEEL.
(f)
(S)
<FZ
"N" = ONE (1) COMPLETE THREAD PLUS UNTHREADED PORTION OF END. FOR EASE OF STARTING, LOCKING
ELEMENT SHALL NOT BE EFFECTIVE WITHIN THIS AREA.
(h)
THE INTERSECTION OF THE TOP AND SIDE OF THE HEAD MAY BE CHAMFERED OR MDIUSED AT THE
MANUFACTURER'S OPTION PER ASME 818.3,
THE FILLET SHALL BE IN AcCoRDANcE WITH ASME 818.3.
MINIMUM BREAKING STRENGTH VALUESARE BASED ON 180 KSI HEATTREATMENT. LINED THROUGH STRENGTH
VALUES WERE BASED ON 170 KSI.
o
z
P
USE OF OR REUANCE UPON THIS DOCUN1ENT OR ANY NATIONAL AEROSPACE STANDARD IS ENTIRELY VOLUNTARY. AIA DOES NOT
QUAUF/ SUPPLIERS OR CERTIFY
CONFORIV]ANCE OF ITEMS PRODUCED UNDER NATIONAL AEROSPACE STANDARDS. AIA II4AKES NO REPRESENTATION ON CIAIU NESPECNruG (1) THE SUITABILITY
OF
TTEIYS FOR ANY PARTICULAR APPLICATION OR (2) THE EXISTENCE OF OR APPLICABIUTY THERETO OF PATENT OR TMDEI4ARKS RIGHTS,
ffir
NATT'NAL AERosPAcE
@ COPYRIGHT 2OO9 AEROSPACE
TABLE
L
SCREW
01
n?
04
03
06
OB
STANDARD ffiltl
INDUSTRIES ASSOCIATION OF AMERICA. INC, ALL RIGHTS RESERVED
III
SCREW SIZE
q
7
6
3
4
-3-6
-4-6
ti$?t6l"lAt A{BOS8A{E st}.t'r8A8s6
IZ
10
B
L4
20
IO
24
-ENGTI.
(1)
U
.Izs -0r-2
=
,1BB
8.
.250
-02-4 -03-4
.500
-01-6 -02-6 -03-6
-02-[ -03-B
D
E
6
z
-04-4 -06-4
-08-4
-04-6 -06-6
-0tJ-6
-04-8 -06-B
-OB-B
-03-10 -04-10 -06-10 -08-10
-04-12 -06-12 -08-12
-06-14 -08-14
-06-16 -08-16
-08-20
-08-24
.62s
.750
.875
tr
o
o
q-in
2;S
l1
-01-3 -02-3
6t<
x=E
7_Z
f,= v
1.000
1.250
1.500
1.750
2.000
-5-6
-3-B
-4-B -5-B -6-B
-3-10 -4-10 -5-10 -b-1u
-3-12
-J-fa
-J-t o
-3-20
-3-24
-3-28
-3-32
2.250
2.500
2.750
3.000
-5-12
'a'tL
-4-14 -tr-fa
-+- I t) -5-16
-4-20 -5-20
-4-24 -5-24
-4-28 -5-28
-4-32 -5-32
-4-36 -5-36
-5-40
-rl-
rz -7-1) -B-12
-o-fq -7-I4 -8-14
-o-rb -/-ro -d-rb -IU-IO
-7-20
-6-24 -7-24
-6-28 -7-28
-6-32 -7-32
-6-36 -7-36
-6-40 -7-40
-6-44 -7-44
-6-48 -7-48
-6- ll
-B-20 -10-20
-8-24 -to-24 -L2-24
-8-28 'I O-78 -12-24
-6-5t .TIJ-32 -r2-32
-at-Jr,
1O-3f1
-8-40
'I
O-4n
-B-44 -LO-44
-B-48 -10-48
3.250
3.s00
4.000
4.500
s.000
1
rn-52
,)-36 -14-36
-12-40 -t4-+0
16-40
4-44
-16-44
-
Ll-++
-1
-L2-48 -"t 4-4t4
-L2-52 - r+-5t
-12-56 -ta-f,o
-14-64
-r+-tz
1
fr-4tl
-20-48
'I
fi-\7
-
)r)-\ )
-20-56
t6-64 -20-64
IE-/Z -20-72
16-80 -20-80
16-s6
-24-56
-24-64
-24-72
-24-80
-24-88
-20-96 -24-96
5.500
6.000
-20-BB
NOTE:
SEE CODE FOR ADDITIONAL LENGTHS.
NOMINAL LENGTH
(1) LENGTH TOLEMNCE SHALL BE AS FOLLOWS:
O
THRU .375
SIZE
OVER .375 THRU .750
OVER .750'IHRU
1.500
F
TOLERANCES
u<
+.000
UP TO AND INCL. 1.OOO
OI
-.030
UF
ovER 1.000 & rNcL. 2.500
+.000
ovER 2.500 & INCL. 6.000
+.000
-.040
oL
z<
Sx
=E
56
-.UbU
+.000
-.030
+.000
-.060
+.000
- oRo
+.000
-
ncn
+,000
-.100
+.000
-.140
OZ
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Z*
gtr
THREADS:
IN ACCORDANCE WITH PROCUREMENT SPECIFICATION. UNRC-3A FOR NOMINAL DIAMETERS 1.OOO INCH
AND SN4ALLER. UNRC.2A FOR NOMINAL DIAMETERS GREATERTHAN 1.OOO INCH.
9<
MATERIAL:
ALLOY STEEL IN ACCORDANCE WITH PROCUREMENT SPEC FF.S-86.
CORROSION.RESISTANT STEEL IN ACCORDANCE WITH PROCUREMENT SPEC FF-S-86.
HEAT-RESISTANT STEEL CONFORMING TO CHEMTSTRY OF AMS5731 (UNS 566286) OR AMS5737 (UNS
566286) COLD WORKED AND AGE HARDENED TO MEET THE FASTENER REQUIREMENTS OF FF-S-86 AND
THIS STANDARD.
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FINISH:
ALLOY
YOF
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;69
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IdD
coRRosIoN RESISTANT
STEEL
- CADMIUM PLATE IN ACCORDANCE WITH AMS-QQ-P-4\6, TYPE II, CLASS 2.
- BLACK OXIDE IN ACCORDANCE WITH MIL-DTL-T3924, CLASS I.
STEEL -
-
CADMIUM PLATE IN ACCORDANCE WrrH AMS-QQ-P-416,
rypl: r,
CLASS 2.
SILVER FLASH IN ACCORDANCE WiTH AMS2411.
PASSIVATE IN ACCORDANCE WITH AMSz7OO, METHOD 1, TYPE 6 ORTYPE 7,
CLASS 1.
REVISION
11
E
d
o
iNAslBs2
DNEtrI J
USE OF OR REUANCE UPON THIS DOCUN4ENT OR ANY NANONAL AEROSPACE STANDARD IS ENTIRELY VOLUNTARY. AIA DOES NOT QUAUFY SUPPLIERS OR CERNFY
CONFORI4ANCE OF ITEMS PRODUCED UNDER NATIONAL AEROSPACE STANDARDS, AIA N4AKES NO REPRESENTAT]ON OR CLAIM RESPECTING (1) THE SUITABIUTY OF
lTEMS FOR ANY PARTICULAR APPUCATION OR (2) THE EXISTENCE OF OR APPUCABIUTY THERETO OF PATENT OR TMDEMARKS RIGHTS.
ffi
HEAT-RESISTANT
NATIONAL AEROSPACE STANDARD
@ COPYRIGHT 2OO9 AEROSPACE INDUSTRIES
STEEL
=
.
-
ASSOCIATION OF AMERICA, INC, ALL RIGHTS RESERVED
SILVER FLASH IN ACCORDANCE WITH AMS2411.
PASSIVATE IN ACCORDANCE WITH AMS27OO, METHOD 1, TYPE 2 OR TYPE 8, CLASS 1.
BLACK OXIDE IN ACCORDANCE WITH MIL-DTL-13924, CLASS 3.
CADMIUM PLATE IN ACCORDANCE WITH AMS-QQ.P-416, ryPE II, CLASS 2,
I
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E
CODE: MATERIAL CODE AFTER BASIC
L
o
NUMBER.
z
"-" =
ALLOY STEEL.
"C" = CORROSION-RESISTANT STEEL.
"N" = HEAT-RESISTANT STEEL.
F
6
o
FIRST DASH NUMBER DESIGNATES SCREW THREAD STZE AS TABULATED.
l': o li
3-N
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ryPE CODE AFTER FIRST DASH NUMBER:
"H" =
,'LE,'
DRILLED HEAD.
= SELF-LOCKING MALE THREADED
FASTENER.
(oPTIONAL TYPE LOCKING ELEMENT rN ACCORDANCE WrTH NAS1283),
"LL" = SELF-LOCKING MALE THREADED FASTENER.
(LONGITUDINAL STRIP LOCKING ELEMENT IN ACCORDANCE WITH NAS1283, TYPE L).
''LN'' = SELF-LOCKING MALE THREADED FASTENER.
(PELLET LOCKING ELEMENT IN ACCORDANCE WITH NAS1283, TYPE N),
"LB" = SELF-LOCKING MALE THREADED FASTENER.
(PATCH TYPE LOCKTNG ELEMENT IN ACCORDANCE WITH NASL283, TYPE P),
SECOND DASH NUMBER DESIGNATES NOMINAL LENGTH
IN SIXTEENTHS OF AN INCH AS TABULATED.
TABU LATED CODING IN DICATES PREFERRED LENGTHS.
ADDITIONAL LENGTHS AVAILABLE ON SPECIAL ORDER. MINIMUM RUN BASIS.
FOR SUCH LENGTHS ADDITIONAL CODING MAY BE ASSIGNED TO LENGTHS IN .0625 INCH INCREMENTS UP TO 3.500
INCHES. AND IN .125 INCH INCREMENTS FROM 3.500 INCHES UP TO AND INCLUDING 6.000 INCHES,
F
u{
FINISH CODE AFTER SECOND DASH
NUMBER:
ALLOY
STEEL,
SH
uF
EE
FO
oq
-tg
NO SUFFIX FOR BLACK OXIDE,
CORROSION-RESISTANT
Zd
<tr
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7_o
STEEL. "P" = CADMIUM
PLATE.
"S" = SILVER FLASH.
z4
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oz
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''P'. = CADMIUM PLATE.
NO SUFFIX FOR PASSIVATE,
HEAT-RESISTANT
STEEL,
'.S'' = SILVER FLASH,
"8" = BLACK OXIDE,
"P" = CADMIUM PLATE
NO SUFFIX FOR PASSIVATE.
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REV]SION
11
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NAS1352
SHEET 4
USE OF OR RELIANCE UPON TH]s DOCUMENT OR ANY NANONAL AEROSPACE STANDARD IS ENTIRELY VOLUNTARY. AIA DOES NOT
QUAUFY SUPPUERS OR CERTiFY
coNFoRMANCE OF ITEMS PRODUCED UNDER NATIONAL AEROSPACE STANDARDS. ArA MAKES NO REPRESENTATION OR CLAIM RESP-ECTING (1) THE SUITABILITY OF
ITEMS FOR ANY PARTICULAR APPUCATION OR (2) THE EXISTENCE OF OR APPLICABILIry THERETO OF PATENT OR TMDEi4ARKS RIGHTS.
'' Y "
"--T*rrS-. # *;,*"
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I
NATIONAL AEROSPACE
AERosPAcE STANDARD
.&"JL*-4.f"8*
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@ COPYRIGHT
'TANDARD
RESERVED
{fn$sF4{€ $r^f'loa*[!s
NAr!or.L&{
=
.0860-56 UNRC-3A SCREW, CAP, SOCKET HEAD, ALLOY STEEL, UNDRILLED HEAD,
NAS1352C04H12
=
.1L20-40 UNRC-3A SCREW, CAP, SOCKET HEAD, CORROSION-RESISTANT STEEL,
NAS1352-O8LE16P
=
.1640-32 UNRC-3A SCREW, CAP, SOCKET HEAD, ALLOY STEEL, SELF-LOCKING,
EMtt4PLE: NAS1352-02-8
U
"ATT'NAL
2009 AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA, INC. ALL RIGHTS
PLAIN, .5OO INCH LONG, BLACK OXIDE FINISH.
DRILLED HEAD, PLAIN, .750 INCH LONG, PASSIVATED.
OPTIONALTYPE LOCKING ELEMENT, 1.OOO INCH LONG,
CADMIUM PLATE, UNDRILLED HEAD.
=
o
.2500-20 UNRC-3A SCREW, CAP, SOCKET HEAD, CORROSION-RESISTANT STEEL,
NAS1352C4LL24P
t
z
F
NAS1352N10LN32 =
.6250-11 UNRC-3A
H9
T:N
q>R
NAS1352N12LB36S =
.7500-10 UNRC-3A
u6z
=A>.
>=?
NAS1352N4LB16B =
.2500-20 UNRC-3A
o
A;6
xz
Y91
?,==
a:a
SELF-LOCKING, LONGITUDINAL STRIP LOCKING ELEMENT,
1.500 INCHES LONG, CADMIUM PLATE, UNDRILLED HEAD,
SCREW, CAP, SOCKET HEAD, HEAT-RESISTANT STEEL, SELFLOCKING, PELLET LOCKING ELEMENT, 2.000 INCHES LONG,
PASSIVATED, UNDRILLED HEAD.
SCREW, CAP, SOCKET HEAD, HEAT-RESISTANT STEEL, SELFLOCKING, PATCH ryPE LOCKING ELEMENT, 2.250 INCHES
LONG, SILVER FLASH, UNDRILLED HEAD.
SCREW, CAp, SOCKET HEAD, HEAT-RESISTANT STEEL, SELFLOCKING, PATCH TYPE LOCKING ELEMENT, ]..OOO INCH LONG,
BLACK OXIDE COATING, UNDRILLED HEAD.
NOTES:
(1)
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LOCKING ELEMENTT
EXCEPT AS NOTED HEREIN. THE LOCKING ELEMENT WHEN SPECIFIED SHALL BE IN
ACCORDANCE WITH MIL-DT1.18240 AND SHALL BE FULLY ENGAGED WHEN USED.
(2)
IDENTIFICATION:
(3)
DIMENSIONS IN INCHES. UNLESS OTHERWISE SPECIFIED DIMENSIONSAND TOLERANCES SHALL BE IN
ACCORDANCE WITH FF-S-86, TYPE VI AND ASME 818.3.
(4)
REFERENCED DOCUMENT5 SHALL BE OF THE ISSUE
(s)
THIS STANDARD TAKES PRECEDENCE OVER DOCUMENTS SPECIFIED HEREIN.
(6)
ADDITIONAL PART N4ARKING SHALL BE IN ACCORDANCE WITH FF-S-86,
(7)
UNLESS OTHERWISE SPECIFIED, PART INVENTORY MANUFACTURED TO PREVIOUS REVISIONS OF THE APPLICABLE
DMWING OR SPECIFICATION MAY BE PROCURED AND USED UNTIL STOCK IS DEPLETED.
(8)
REMOVE ALL BURRS AND SHARP EDGES.
/q'\
DELTTED
MANUFACTURERTO IDENTIFYALL MINIMUM PACKAGES BY PACKAGE MARKING OF
APPLICABLE COMPLETE NAS STANDARD PART NO. IN ACCORDANCE WITH MIL-STD-13o.
IN
EFFECT ON THE DATE OF INVITATION FOR BID.
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PROCUREMENT
SPECIFICAT]ON: FF-S-86:
UNLESS OTHERWISE SPECIFIED, CAP SCREWS FURNISHED UNDER
THIS STANDARD SHALL BE SUBJECT TO IN-PROCESS CONTROL AND/OR END
PRODUCT INSPECTION WHICH WILL INSURE MECHANICAL/ METALLURGICAL,
CHEMICAL AND COATING OR TREATMENT CHAMCTERISTICS WHEN SAMPLED
IN ACCORDANCE WITH ASQ 21.4, INSPECTION LEVEL S-1, 10lo AQL.
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REVISiON
11
nlAS1352
SHEET 5
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 REPRESENTAT]ON OR CLAIM RESPECTING (1) THE SUITABIUTY OF
ITEMS FOR ANY PARTICULAR APPLICAT]ON OR (2) THE EXISTENCE OF OR APPLICABILIW THERETO OF PATENT OR TRADEMARKS RIGHTS.
USE OF OR REUANCE UPON