MIL-DTL-1222J
Field 10. Field 10 represents the coating used on the steel
A.1.2.10
fasteners:
a)
X signifies any coating listed in 3.6.1.
b)
A signifies ion vapor deposited aluminum.
c)
P signifies phosphate.
d)
ZX signifies any zinc coating listed in 3.6.1.
e)
ZM signifies zinc mechanically deposited.
f)
ZE signifies zinc electrodeposited.
g)
ZS signifies zinc silicate.
h)
N signifies no coating.
A.1.3 Examples.
A.1.3.1 Screw. A ½ inch nominal diameter 2 inch long grade B16 hex cap
screw with coarse class 3A threads and an aluminium ion vapor deposited
coating would have a part number of "M1222RN8C332GBNA".
a) Field 1 is "M1222".
b) Field 2 is "R" for hex cap screw.
c) Field 3 is "N" for not applicable.
d) Field 4 is "8" for ½ inch, or 8 x 1/16th inches, nominal
diameter.
e) Field 5 is "C" for UNC threads.
f) Field 6 is "3" for class 3A threads.
g) Field 7 is "32" for a 2 inch or 32 x 1/16th inches, length.
h) Field 8 is "GB" for a B16 material grade.
i) Field 9 is "N" for no locking element.
j) Field 10 is "A" for an ion vapor deposited aluminum coating.
A.1.3.2 Socket head cap screw. A 1 inch nominal diameter 6" long K-
Monel socket head cap screw with fine, class 2A threads and no coating would
have a part number of "M1222SN16F296NCNN".
a) Field 1 is "M1222".
b) Field 2 is "S" for socket hex cap screw.
c) Field 3 is "N" for not applicable.
d) Field 4 is "16" for 1 inch, or 16 x 1/16th inches, nominal
diameter.
e) Field 5 is "F" for UNF threads.
f) Field 6 is "2" for class 2A threads.
g) Field 7 is "96" for A 2 inch or 96 x 1/16th inches, length.
h) Field 8 is "NC" for a K-Monel (500) material grade.
i) Field 9 is "N" for no locking element.
j) Field 10 is "N" for no coating.
A.1.3.3 STUD. A 1½ inch nominal diameter 5" long annealed 316 constant-
strength body stud with fine class 5hf threads on the stud end and fine class
3A threads on the nut end and no coating would have a part number of
"M1222ST3N24FDH80SCNN".
a) Field 1 is "M1222".
b) Field 2 is "ST3" for constant-strength body stud.
c) Field 3 is "N" for not applicable.
d) Field 4 is "24" for 1½ inch, or 24 x 1/16th inches, nominal
diameter.
e) Field 5 is "F" for UNF threads.
f) Field 6 is "DH" for class 5HF threads on the stud end and class
3A on the nut end.
g) Field 7 is "80" for a 5 inch or 80 x 1/16th inches, length.
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