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NATT.NAL AERospAcE
'TANDARD ffiffif@ COPYRIGHT 2009 AEROSPACE INDUSTRIES ASSOCIATION OF AMERIC/\, INC. ALL RIGHTS RESERVED
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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)
300 To 450
(D
FED. SUPPLY CLASS
t 530s
SHAPE OF SOCKET
BOTTOM OPTIONAL
AD
IDENTIFICAT]ON
SEE NOTE (e)
AB
FOR NUMBER OF HOLES,
sEE NOIE (d)
THREAD SIZE
FILLET (s)
K
PLAIN OR KNURLED HEADS OPTIONAL
TABLE I @
NOMINAL
SIZE
DASH NO.
THREAD
SIZE
U
BODY
DIAMETER
HEAD
DIAMFIER
H
HEAD
HEIGHT
S
HEAD
SIDE
HEIGH-I"
J
SOCKET
SIZE
T
KEY WALL
:NGAGEMENI THICKNESS
K
CHAMFER
OR
RADIUS
MAX. MIN. IVIAX. MIN, MAX MIN, MTN NOMINAL
MIN.
MIN,
MAX.
u<F
00
.0600-80 .060 .0568 .096 .091 .050 .UJ/ .054
.050
.ula
.020
003
<6uIEiFu
01
.0730-72 n7? ,0695 118
7r2 .073 .070 .066
.uoz
02
.0860-64 ,086 .0822 .740 134 .086 ,083 .o77
.078
.031
"038
.029
.003
.00J
03
.0990-56 .099 ,0949 .tof
154 .099 ,09s .089
.078
.044
.034
.003
04
TLZO.4B rLz .1075 .183 176 tLz ,108 .101
.094
,051
.038
.00s
;xz+
06
1380-40
138 7329 .226 )tR
138 L34 .I24
,109
.064
,047
.00s
Soaozx
<T
OB
1640-36
L64 1585 .270 ,262 .t64 159 .148
.L4T
1900'32
.19U .184U .312 .303
.190 ,16)
17r
1s6
4
.2500-28 .250 .2435 .375 .365 .250 .244 .225
,188
.o77
,090
20
.056
.065
.095
.005
.005
.008
Z3t*r
FE
5
.3L25-24 ,3125 .3053 .469 .457 .3L2 .306 .28L
.250
6 .3750-24
.3678 .562 .550 -5/J .368 .55 /
.5 tl
151
.raz
19 .008
.r43 .008
zu->
7
.4375-20 .4375 ,4294 .656 .642 .437 .4JU .394
.375
.213
.1bb
.010
g9
B
,5000-20 .500 ,49L9 .750 ./35 .500 .492 .4s0
.5IJ
.245 .190 .010
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z<.iHi
10 .6250-18
.6163 ,937 .927 .625 .616 ,562
.500
T2
.7500-16
.750 .7406 L, LZJ T,LO7
.750 ,740
.675
.625
.307
,370
.238
.285
.010
.010
f<ouEU
14
.87s0-r4 .6/J
.8647 L.3L2 1.293 .875 .864 .74',
.750
.432
.015
16 1.0000-12 1.000 .988b 1.500 1.479 1.000 .98B .900 .750
.495
.380
,015
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FdE
Reproduced By IHS
Wth The Permission Of AIA/NAS
Under Royalty Agreement
THIRD
ANGLE
PRO.]ECTION
CUSTODIAN
NATIONAL AEROSPACE STANDARDS COMMITTEE
REVISION
10
l9
E4
PROCUREMENT
SPECIRCATION
NOTED
TITLE
5UKEI'V, L;AP, S'UCKEI fIEAL', UNDRILLED ANT' DRILLED, PLATN AND
SELF-LOCKING, ALLOY STEEI- CORROSTON.RESISTANT STEEL AND
H EAT-RESISTANT STEEL, UNRF.3A
CLASSIFICATION
PART STANDARD
NAS1351
SHEET 1 OF 5
USE OF OR REUANCE UPON THIS DOCUMENT OR ANY NATIONAL AEROSPACE STANDARD IS ENTIRELY VOLUNTARY. AIA DOES NOT QUALIFY SqPPLIERS OR CERTIF/
CONFORMANCE OF ITEMS PRODUCED UNDER NATIONAL AEROSPACE STANDARDS, AIA MAKES NO REPRESENTATION OR CLAIM RESPECTING (1D THE SUITABIUfi OF
ITEMS FOR ANY PARTICULAR APPLICATION OR (2) THE EXISTENCE OF OR APPL]CABILITY THERETO OF' PATENT OR TMDEMARKS RIGHTS.
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NATIONAL AEROSPACE STANIDARD
O COPYRIGHT 2OO9 AEROSPACE INDUSTRIES ASSOCIATION OF AMERIC/\, INC. ALL RIGHTS RESERVED
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NAS1351N12LB365 =
NAS1351N4LB16B =
,7500-16 UNRF-3A SCREW, CAP, SOCKET HEAD, HEAT-RESISTANT STEEL, SELF-
LOCKING, PA]-CH TypE LOCKING ELEMENT, 2,250 INCHES
LONG, S]LVER. FLASH, UNDRILLED HEAD.
.2500-28 UNRF-3A SCREW, CAP, SOCKET HEAD, HEAT-RESISTANT STEEL, SELF-
LOCKING, PA']-CH TYPE LOCKING ELEMEN:r, 1.000 INCH LONG,
BLACK OXIDE COATING, UNDRILLED HEAD.
NOTES:
(i) LOCKING ELEMENT: EXCEPTAS NOTED HEREIN, THE LOCKING ELEMENT WHEN SPECIFIED SHALL BE IN
USED.ACCORDANCE WITH MIL-DTL.L8Z4O AND SHALL BE FULLY ENGAGED WHEN
@
(2)
IDENTIFICATION: MANUFACTURERTO IDENTIFYALL MINIMUM PACKAGES BY PACKAGE MARKING OFAPPLICABLE
COMPLETE NAS STANDARD PART NO. IN ACCORDANCE WITH MIL-STD-13o.
(3)
DIMENSIONS IN INCHES. UNLESS OTHERWISE SPECIFIED DIMENSIICNS AND TOLEMNCES SHALL BE IN
818,3.ACCORDANCE WITH FF-S-86, ryPE VI AND ASME
@
(4) REFERENCED DOCUMENTS SHALL BE OF THE ISSUE IN EFFECT ON HE DATE OF INVITATION FOR BID.
(5) THIS STANDARD TAKES PRECEDENCE OVER DOCUMENTS SPECIFIED HEREIN.
(6) ADDTTTONAL PART MARKING SHALL BE IN ACCORDANCE WITH FF-S;-86.
(7)
r'^\
\t!2
(8)
UNLESS OTHERWISE SPECIFIED, PART INVENTORY MANUFACTURED TO PREVIOUS REVISIONS OF THE APPLICABLE
DMWING OR SPECIFICATION MAY BE PROCURED AND USED UNTII- STOCK IS DEPLETED,
EDGES.REMOVE ALL BURRS AND SHARP
@
PROCUREMENT SPECIFICATION :
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FF-S-86: UNLESS OTHERWISE SPECIFIED, CAP SCREWS FURNISHED UNDER
THIS STANDARD SHALL BE SUB]ECT TO IN.PROCESS CONTR.OL 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, 1% AQL.
=s 2n72,
to>
-da
REVISION
10
z NAS1351
SHEET 5
USE OF OR RELIANCE UPON THIS DOCUMENT OR ANY NATIONAL AEROSPACE STANDARD IS ENTIRELY VOLUNTARY. AIA DOES NOT QUAUFY SI'PPUERS OR CERTIFY
CONFORMANCE OF ITEMS PRODUCED UNDER NATIONAL AEROSPACE STANDARDS. AIA MAKES NO REPRESENTATION OR CLAIM RESPECTING (1} THE SUITABIL]TY OF
ITEMS FOR ANY PARTICULAR APPLICATION OR (2) THE EXISTENCE OF OR APPLICABILITY THERETO OF PATENT OR TMDEMARKS RIGHTS.