INCH-POUND
AN363 REV 5
1 November 2011
SUPERSEDING
AN363 REV 4
17 June 1964
DETAIL SPECIFICATION SHEET
NUT, SELF-LOCKING, 550ºF
Inactive for new design after 17 June 1964
This specification sheet is approved for use by all Departments and Agencies of the Department
of Defense.
The requirements for acquiring the product herein shall consist of this specification sheet
A
B
WASHER FACE OPTIONAL
TAP T
SHAPE OF TOP OPTIONAL
FINE THREAD
DASH NUMBERS
(a)
B
TAP T
A
+.002
COR RES
COPPER
+.016
-.010
STEEL
STEEL
BASE ALLOY
C1032
1032
B1032
(NO. 10) .190-32 NF-3B
.234
.375
C428
428
B428
(1/4) .250-28UNF-3B
.312
.438
C524
524
B524
(5/16) .312-24UNF-3B
.344
.500
C624
624
B624
(3/8) .375-24UNF-3B
.453
.563
C720
720
B720
(7/16) .437-20UNF-3B
.453
.625
C820
820
B820
(1/2) .500-20UNF-3B
.594
.750
C918
918
B918
(9/16) .562-18UNF-3B
.688
.875
C1018
1018
B1018
(5/8) .625-18UNF-3B
.750
.938
C1216
1216
B1216
(3/4) .750-16UNF-3B
.875
1.063
COARSE THREAD
C632
632
B632
(NO. 6) .138-32 NC-2B
.172
.312
C832
832
B832
(NO. 8) .164-32 NC-2B
.234
.344
C1024
1024
B1024
(NO. 10) .190-24 NC-2B
.234
.375
C420
420
B420
(1/4) .250-20UNC-3B
.312
.438
C518
518
B518
(5/16) .312-18UNC-3B
.344
.500
C616
616
B616
(3/8) .375-16UNC-3B
.453
.563
(b)
C714
714
B714
(7/16) .437-14UNC-3B
.453
.625
C813
813
B813
(1/2) .500-13UNC-3B
.594
.750
C913
913
B913
(9/16) .562-12UNC-3B
.688
.875
C1011
1011
B1011
(5/8) .625-11UNC-3B
.750
.938
C1210
1210
B1210
(3/4) .750-10UNC-3B
.875
1.063
(a) Minimum A not specified. Limited only by strength requirement of specification.
AMSC N/A
1 of 3
FSC 5310