MIL-DTL-28840/5D
Sealing range
Shell size
B
C thread, class 2*
A thread
Dash
designator
dia
(see note 5)
class 2B
no.
max
min
max
(see note 1)
.750-20
01
A (11)
1.028 (26.11)
UNEF
.875-20 UNEF
.63 (16.0)
.50 (12.7)
02
.875-20
B (13)
1.141 (28.98)
UNEF
03
1.000-20 UNEF
.75 (19.1)
.63 (16.0)
04
.875-20 UNEF
.63 (16.0)
.50 (12.7)
05
1.000-20 UNEF
.75 (19.1)
.63 (16.0)
1.000-20
C (15)
1.263 (32.08)
UNEF
06
1.125-18 UNEF
.88 (22.4)
.75 (19.1)
07
1.250-18 UNEF
1.00 (25.4)
.88 (22.4)
08
1.125-18 UNEF
.88 (22.4)
.75 (19.1)
1.125-18
09
1.250-18 UNEF
1.00 (25.4)
.88 (22.4)
D (17)
1.387 (35.23)
UNEF
10
1.625-18 UNEF
1.38 (35.1) 1.19 (30.2)
11
1.125-18 UNEF
.88 (22.4)
.75 (19.1)
1.250-18
1.513 (38.43)
12
E (19)
1.250-18 UNEF
1.00 (25.4)
.88 (22.4)
UNEF
13
1.625-18 UNEF
1.38 (35.1) 1.19 (30.2)
14
1.250-18 UNEF
1.00 (25.4)
.88 (22.4)
1.438-18
1.703 (43.26)
15
F (23)
1.625-18 UNEF
1.38 (35.1) 1.19 (30.2)
UNEF
16
1.875-18 UNS
1.63 (41.4) 1.44 (36.6)
17
1.250-18 UNEF
1.00 (25.4)
.88 (22.4)
18
1.625-18 UNEF
1.38 (35.1) 1.19 (30.2)
1.562-18
1.825 (46.35)
G (25)
UNEF
19
1.875-18 UNS
1.63 (41.4) 1.44 (36.6)
20
2.125-16 UN
1.88 (47.8) 1.63 (41.4)
21
1.875-18 UNS
1.63 (41.4) 1.44 (36.6)
1.875-16
2.143 (54.43)
H (29)
UN
22
2.125-16 UN
1.88 (67.8) 1.63 (41.4)
23
2.125-16 UN
1.88 (47.8) 1.63 (41.4)
2.062-16
2.329 (59.16)
J (33)
UNS
24
2.750-16 UN
2.38 (60.5) 2.13 (54.1)
.750-20
25
A (11)
1.028 (26.11)
.875-20 UNEF
.75 (19.05) .63 (16.00)
UNEF
FIGURE 1. Dimensions and configurations - Continued.
3
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