METRIC
MIL-DTL-38999/33D
30 May 2008
SUPERSEDING
MIL-DTL-38999/33C
11 June 2001
DETAIL SPECIFICATION SHEET
CONNECTOR, ELECTRICAL CIRCULAR, COVER,
PROTECTIVE, RECEPTACLE, SERIES III, METRIC
This specification is approved for use by all Departments
and Agencies of the Department of Defense.
The requirements for acquiring the product described herein
shall consist of this specification sheet and MIL-DTL-38999.
FIGURE 1. Protective cover, receptacle, all classes.
AMSC N/A FSC 5935
MIL-DTL-38999/33D
FIGURE 1. Protective cover, plug, all classes - Continued
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MIL-DTL-38999/33D
Dimensions
Shell
size
A THD-2B B
max dia C
dia
max
D
min dia E F
+ 13.0
- 7.0
9 .6250-0.1P-0.3L-TS 23.0 27.0 17.64 21.00
18.00 127.00
11 .7500-0.1P-0.3L-TS 28.0 32.0 21.97 22.50
18.50 127.00
13 .8750-0.1P-0.3L-TS 31.0 37.0 25.12 25.00
23.50 127.00
15 1.0000-0.1P-0.3L-TS 32.0 40.0 29.92 31.00
25.00 127.00
17 1.1875-0.1P-0.3L-TS 37.0 44.0 32.00 32.50
26.50 127.00
19 1.2500-0.1P-0.3L-TS 39.0 46.0 36.27 34.00
28.00 127.00
21 1.3750-0.1P-0.3L-TS 42.0 49.0 38.25 35.50
30.00 127.00
23 1.5000-0.1P-0.3L-TS 45.0 54.0 42.62 37.50
31.50 127.00
25 1.6250-0.1P-0.3L-TS 49.0 56.0 44.45 39.00
33.00 127.00
NOTES:
1. Dimensions are in millimeters, except “A threads” which are in inches.
2. Method of attachment to cover and or ring is optional.
FIGURE 1. Protective cover, plug, all classes - Continued
REQUIREMENTS:
Dimensions and configuration: See figure 1.
Materials:
Cover - Classes C, F, G, R, W and X: Impact extruded or machined aluminum alloy.
Classes P, T and Z: Impact extruded or machined aluminum alloy.
Classes H, K, N, S and Y: Corrosion resistant steel.
Classes J and M: High performance resin in accordance with MIL-DTL-38999.
(Class F is inactive for new design.)
Gasket - Silicone elastomer.
Ring - Corrosion resistant steel, passivated, 1.020 maximum thickness.
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MIL-DTL-38999/33D
Rope - Insulated stainless steel, passivated.
Insulation shall withstand 200°C environment.
Fastener - Stainless steel, passivated.
Option: Aluminum integral to cover.
Mating connectors: MIL-DTL-38999, series III.
Gasket shall be bonded to cover, or mechanically retained.
Rope shall rotate freely on fastener.
Fastener tensile strength: The protective cover and rope assembly shall withstand a dead weight
tensile load of 25 pounds applied to both axial and longitudinal directions. The load shall be applied at
the end of the rope assembly and held for 5 minutes. There shall be no separation of the rope
assembly from the protective cover or damage to the rope assembly. Both axial and longitudinal
directions shall be 25 pounds. The load shall be applied to the end of the rope.
Qualifications. Qualifications shall be in accordance with MIL-DTL-38999 except only the following
sequence of tests shall be required:
Examination of product
Coupling torque
Humidity
Salt spray (corrosion)
Fastener tensile strength (see requirement)
Altitude immersion.
For classes J and M only, temperature cycling and hydrolytic stability shall also be required.
Group A sampling inspection. Sampling for group A inspection shall be as specified in table I.
TABLE I. Group A sampling plan.
Lot size Sampling size
1 to 13 100 percent
14 to 150 13 units
151 to 280 20 units
281 to 500 29 units
501 to 1,200 34 units
1,201 to 3,200 42 units
3,201 and up 54 units
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MIL-DTL-38999/33D
Part or Identifying Number (PIN) example:
D38999/33 W 15 R
Specification sheet number
Class
(see requirements)
Shell size
Style
R - Rope
N - With rope and ring
Changes from previous issue. Marginal notations are not used in this revision to identify changes with
respect to the previous issue, due to the extent of the changes.
Referenced documents. This document references MIL-DTL-38999.
CONCLUDING MATERIAL
Custodians: Preparing activity:
Army - CR DLA - CC
Navy - AS
Air Force - 85 (Project 5935-2007-139)
DLA - CC
Review activities:
Army - MI
Navy - EC, MC, OS
Air Force - 19, 99
NOTE: The activities listed above were interested in this document as of the date of this document.
Since organizations and responsibilities can change. You should verify the currency of the information
above using the ASSIST Online database at http://assist.daps.dla.mil.
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