Table of Contents
Amphenol
®
/Pyle
®
MIL-C-26500 Miniature Cylindrical Connectors
Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . .
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Insert Arrangements, Alternate Keying . . . . . . . . . . . . . . .
Aluminum/Stainless Steel MIL-C-26500 Connectors
Product Listing . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to Order . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flange Mounted Receptacle, threaded coupling MS24264( )XXT
D-Hole Mounted Receptacle, threaded coupling MS24265( )XXT
Straight Plug, threaded coupling . . . . . . . . MS24266( )XXT
Flange Mounted Receptacle, bayonet coupling . MS24264( )XXB
D-Hole Mounted Receptacle, bayonet coupling . MS24265( )XXB
Straight Plug, bayonet coupling . . . . . . . . . MS24266( )XXB
Non-Decoupling, Ratchet Lock Plug . . . . . . . . . . . . . . . .
Ratchet Lock Plug and Mating Flange Receptacle . . . . . . . . .
Amphenol 48 Series MIL-C-26500 Connectors
Receptacle Short Skirt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Wire Splice Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Firewall, Class K MIL-C-26500 Connectors
Product Listing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to Order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flange Mounted Receptacle, threaded/bayonet coupling . MS27613KXXT or B.
D-Hole Mounted Receptacle, threaded/bayonet coupling . MS27614KXXT or B.
Straight Plug, threaded/bayonet coupling . . . . . . . . . MS27615KXXT or B.
Ratchet Lock Plug and Non-Decoupling Straight Plug, threaded coupling . . . .
Hermetic MIL-C-26500 Connectors
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Contacts and Accessories for MIL-C-26500 Connectors
Crimp Contacts, Special Application Contacts, Sealing Plugs, Sealing Gaskets
Shielded/Coaxial Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contact Termination Tools . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contact Termination Tools (48 Series) . . . . . . . . . . . . . . . . . . . . .
Assembly Instructions (Contact Termination/Insertion/Removal) . . . . . . . .
Cable Supports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dummy Receptacles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Protection Caps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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If more information is needed concerning the connectors covered in this publication,
or if there are special application needs, please contact:
Amphenol Corporation
Amphenol Aerospace
40-60 Delaware Avenue
Sidney, New York 13838-1395
Telephone: 607-563-5011
Fax: 607-563-5351
Website: www.amphenol-aerospace.com
Amphenol is a Certified ISO 9001 Manufacturer.
Amphenol
®
/Pyle
®
MIL-C-26500 Connectors
- environmental
connectors for military/aerospace applications
High quality and dependability are the earned reputations of the Amphenol
®
/Pyle
®
Series
of connectors designed to meet the specification requirements of MIL-C-26500.
Serving such diverse fields as avionics, missile systems, aircraft general-purpose applications,
aircraft engines and firewalls, the Amphenol
®
/Pyle
®
MIL-C-26500 connector family meets the
myriad of problems with innovative connector solutions.
Amphenol
®
/Pyle
®
MIL-C-26500 Connectors are medium sized connectors with a rugged design,
lightweight construction and continuously dependable performance. This product family provides design fea-
tures and options which are listed below in the order of the sections of this catalog.
•
Aluminum Shells in threaded or bayonet coupling, proprietary (ZZY or ZZW),
or supplied to military classes R and G
• general purpose, environmentally resistant
• square flange or single hole receptacles, and straight plug shell styles
• ratchet lock plug style, which eliminates the need for safety wiring, and a mating threaded receptacle
• black anodize non-conductive finish for class R and a conductive finish in class G that provides a minimum
resistance path through the shell for grounding purposes
• coupling nuts are hardcoat treated for added protection against wear
• rear accessory threads accommodate standard MS27291 series cable supports or related accessory hardware
Stainless Steel Shells in threaded or bayonet coupling, proprietary (ZZY or ZZW),
or supplied to military class E
• machined from 300 series stainless steel providing superior strength and wear characteristics
• at elevated temperatures, 204°C (399°F), shells experience a less than 10% loss in yield strength
• shell hardware resists corrosion for the life of the connector without the need of additional finishes
• same shell styles offered as in aluminum
• a variety of stainless steel accessories are available
Amphenol special application connector, 48 Series* receptacle short skirt
• low profile design for restricted installation requirements
Wire splice connector
• space saving, single contact, wire splice module
Firewall Capability Connectors meet the fireproof requirements of MIL-C-5015, Class K.
Proprietary (FPK or FYL), or supplied to military Class K
• also
FPL
- threaded coupling, same as FPK but used on Lockheed Aircraft. and
FP5K
- threaded coupling,
qualified for General Electric
• non-magnetic stainless steel shells designed for superior strength and elevated temperatures up to 460°F
for extended periods
• same shell styles as stainless steel and aluminum versions
Hermetically sealed MIL-C-26500 connectors, supplied to military class H are also available.
• See page 26 for brief description
• See page 4 for hermetic insert availability
• Consult Amphenol, Sidney, NY for availability and ordering information.
Contacts and Accessories for MIL-C-26500 connectors
• MIL-C-39029 qualified contacts and special application contacts including thermocouple, printed circuit board
and shielded/coaxial types
• Boeing specification contacts
• Aluminum and stainless steel cable supports; aluminum dummy receptacles
• Contact crimping/ installation/removal tools for Amphenol 48 series and Pyle-National MIL-C-26500 series
•
•
•
•
•
•
* For more information on other Amphenol
®
/Pyle
®
48 Series products
consult Amphenol, Sidney, NY.
1
MIL-C-26500 Connectors
features
Amphenol
®
/Pyle
®
MIL-C-26500 Connectors are qualified to Mil-
itary Specification MIL-C-26500, as well as numerous high per-
formance customer specifications. As the chart below
indicates, these connectors are available with aluminum or
stainless steel shells – bayonet or threaded – and are qualified
to meet the specifications of these MIL-C-26500 classes:
MIL-C-26500
Classes
Class R:
(Environmental
Resistant)
Class G
Class E
Class K Firewall
Class H Hermetic
Amphenol/
Pyle Series
Classes
A
M
R
FPK/FYL
HC
Hardware
Description
Connector Sealing
The insert design utilizes a combination of resilient and rigid
insulators to offer a connector with total sealing capabilities.
Bonded interfaces between the resilient and rigid dielectric
components eliminate air voids and thus protect the connector
from potential degradation due to moisture and altitude condi-
tions.
In Firewall Class K connectors the resilient insert forms the pri-
mary contact seal and is bonded to a molded ceramic rigid
insert. The insert assembly is physically bonded and mechani-
cally retained to the inside surface of the stainless steel shell,
providing a voidless, monoblock configuration impervious to
adverse environments.
A pressure seal at the connector interface is accomplished
through the aid of a coupling device which compresses the front
resilient insulations and thus offers a seal around each contact
which prevents the passage of air or moisture through the con-
tact cavity. Back resilient insulators are designed with a triple
sealing grip at each wire hole to offer positive sealing and pre-
vent wicking of moisture through the connector without the use
of external clamping rings or adapters.
In addition, a dynamic “O” ring seal engages the front of the
plug shell when connectors are mated and offers yet another
barrier to moisture and containments.
Finish
Aluminum Alloy
Aluminum Alloy
Stainless Steel
Stainless Steel
CRS/Stainless
Steel
Anodize
Chromium
Passivated
Passivated
Various
Crimp Contacts
Rear insertable, front releasable, crimp style contacts are
machined from a copper alloy material, plated gold over nickel,
and are qualified to specification MIL-C-39029. Contacts are
crimp terminated outside the connector assembly and inserted
into the appropriate cavity by means of a hand tool.
Socket contacts utilize a multi-tined construction and feature a
“C” spring which grips the tines, and thus insures consistent
and repetitive insertion/withdrawal forces. Contact tines are
protected by a stainless steel shroud.
An optional pencil-clip thermocouple socket design is also
offered. See page 27 for more information on thermocouple
contacts.
Fluid/Temperature Resistance
The fluorosilicone compound elastomer, developed by Pyle-
National, exceeds all specification requirements and provides
excellent resistance to tear, compression set, fluids, and high
temperatures.
Amphenol/Pyle’s fluorosilicone compound offered in Class R,
G, E and K is capable of reliability resisting MIL-H-5606 hydrau-
lic fluid and MIL-L-9236 lubricating oil; as well as MIL-L-7808
and MIL-L-23699 lubricating oils, MIL-J-5624 (JP-5) jet fuel, gly-
col, and alkaline cleaning solutions of pH 10 or higher. Test
methods are as defined in MIL-C-26500 specification. Alternate
compounds have been developed by Pyle-National to solve
unique user requirements not addressed by the specifications.
Connectors have the capability of resisting high ambient tem-
peratures up to 200°C (392°F) for long periods of time, thus
contributing to an extended connector life. Connectors will with-
stand a combined ambient and internal temperature due to
thermal rise of current carrying capacity of 238°C (469°F).
Amphenol
®
/Pyle
®
Firewall, Class K, connectors have the inher-
ent ability to resist high temperatures up to 460°F (total temper-
ature) for extended periods of time and can resist short time
exposures (20 minutes) to prevent passage of a direct 2000°F
flame.
Alternate Keying
All MIL-C-26500 Series Connectors with aluminum and stain-
less steel hardware, can be furnished with normal or any of five
alternate key positions. (See page 4).
Each plug shell has a master key and four alternate keys. The
position of the alternate keys in relation to the fixed master key
determines the key identification. Inserts are bonded to the
shell in relation to the master key, thus allowing positive protec-
tion against mismating when differing circuits exist side by side.
2
MIL-C-26500
specifications
TEST REQUIREMENTS
Air Leakage (Classes E, G, R & K)
Altitude Immersion
(Classes E, G, R & K)
Contact Retention
(Classes E, G, R & K)
Collet Retention
MILITARY SPECIFICATIONS
1 cu. inch per hr. max. -55°C (-67°F)
Sea level 1 inch of mercury, 3 cycles
(IR 5000 megohms hi-pot 1500 volts-submerged)
Size 20 contact 20 lbs. min.
Size 16 contact 25 lbs. min.
Size 12 contact 30 lbs.min.
No requirement
PYLE CONNECTOR CAPABILITIES
Comply
Comply
Exceeds specifications
Without damage to the collet or its retention
means: Size 20 – 75 lbs. min.
Size 16 – 140 lbs. min
Size 12 – 160 lbs. min.
Comply
Comply
Contact Insertion Force
(Classes E, G, R & K)
Coupling Forces
All size contacts 10 lbs. max.
Torque required to couple and uncouple mating plugs
and receptacles is not to exceed the values listed:
8 10 12 14 16 18 20 22 24
Shell size
Torque inch lbs. 9 10 14 17 23 26 31 38 46
20 hrs. immersion in MIL-H-5606 hydraulic fluid and MIL-L-9236
lubrication oil. Must meet hi-pot.
.250 ohms backshell of plug to rear of receptacle flange.
1500 VRMS mated & unmated at sea level
1000 VRMS mated to 110,000 ft. altitude
75 psi. from either direction for 5 seconds.
21°C (70°F), 5000 megohms between adjacent contacts and any
contact and shell.
-55°C (-67°F)
2 mu. maximum
1000 megohms min. per mil-std. 202 method 106
0.10 to .015% ozone exposure
50 G’s, 3 axis, per mil-std-202, method 213, test condition C,
wired to monitor 1 microsecond discontinuity.
No requirement.
Connector fully functional for 1000 hours at 200°C (392°F) ambi-
ent internal temperature 238°C (460°F)
Cycled five times from -55°C to 260°C, held for 30 minutes at
each temperature and transferred to the other in 2 minutes or
less, with no evidence of damage.
MIL-Std. 202 method 204 condition “D” at R. T.,
-55°C (-67°F) and +200°C (+392°F).
Performance requirements of Paragraph 4.5.18
Fireproof (Class K of MIL-C-5015D)
Fluid Resistance
(Classes E, G, R & K)
Ground Resistance (Class G)
High Potential
(Classes E, G, R & K)
Insert Retention (Classes E, G, R & K)
Insulation Resistance
(Classes E, G, R & K)
Low Temperature
(Classes E, G, R & K)
Magnetic Permeability
(Classes E, G, R & K)
Moisture Resistance
(Classes E, G, R & K)
Ozone Exposure (Classes E, G, R & K)
Physical Shock
(Classes E, G, R & K)
Sand & Dust Exposure
(Classes E, G, R & K)
Temperature Life
(Classes E, G, R & K)
Thermal Shock (Mated)
(Classes E, G, R & K)
Vibration
(Classes E, G, R & K)
Flame Resistance (Class K)
20 hrs. min., fully functional physically and
electrically after immersion. No deteriora-
tion of resilient material.
Comply
Exceed with ample margin of safety.
Exceeds specifications.
Exceeds specifications.
Comply
Comply
Comply
Comply
Comply
Meet MIL-E-5272 condition “B”
Comply
Comply
Comply - monitored for a max. of 1 micro-
second discontinuity.
Exceeds specifications
3
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