AN363 REV 5
(b) Dash numbers C1024 through C1210, 1024 through 1210, and B1024 through B1210 for
coarse thread nuts inactive for design after 14 April 1949.
FINE THREAD
INACTIVE PARTS
SUBSTITUTE PARTS
COPPER
COPPER
CRES
STEEL
CRES
STEEL
BASE ALLOY
BASE ALLOY
AN363C1032
AN363-1032
AN363B1032
MS21046C3
MS21045-3
MS21044E3
C428
-428
B428
C4
-4
E4
C524
-524
B524
C5
-5
E5
C624
-624
B624
C6
-6
E6
C720
-720
B720
(a)
(a)
(a)
C820
-820
B820
C8
-8
E8
C918
-918
B918
C9
-9
E9
C1018
-1018
B1018
C10
-10
E10
-
C1216
-1216
B1216
C12
12
E12
COARSE THREAD
AN363C632
AN363-632
AN363B632
MS21046C06
MS21045-06
MS21044E06
C832
-832
B832
C08
-08
E08
C1024
-1024
B1024
(b)
(b)
(b)
C420
-420
B420
C518
-518
B518
C616
-616
B616
C714
-714
B714
C913
-913
B913
C1011
-1011
B1011
C1210
-1210
B1210
(b)
(b)
(b)
(a) AN363 nuts with (7/16) .437-20 thread have no substitutive parts on MS21044, MS21045
and MS21046 because the corresponding MS nuts have a larger hex size to conform to
international standard.
(b) AN363 nuts with thread sizes (NO.10) .190-24 thru (3/4) .750-10 have no substitutive parts
on MS21044, MS21045 and MS21046 because these are non-preferred thread sizes per
MIL-S-7742.
NOTES:
1. Interchangeability relationship: MS21044, MS21045 AND MS21046 can universally replace the
inactivated AN363 nuts in accordance with table on sheet 2. AN363 nuts cannot universally
replace MS21044, MS21045 or MS21046.
2. Dimensions in inches.
3. Example of part numbers:
AN363-428 = (1/4) .250-28 Steel Nut.
AN363B632 = (NO. 6) .138-32 Copper-Base Alloy Nut.
AN363C428 = (1/4) .250-28 Corrosion-Resistant Steel Nut.
4. For installation instructions, see NASM33588.
2