Model: X21-556-905

Electrical Receptacle Connector

Special Features:

In order to complete the connector assembly, the user must obtain/provide the backshell. Standard versions may be ordered as nsn 5935-01-177-9556, p/n m85049/52-1-18w for the straight style, or nsn 5935-01-174-3671, p/n m85049/51-1-18w for the right angle style.

Properties:

Thread Class
2a
Thread Direction
Right-hand
Body Style
Straight shape, external coupling w/backshell
Overall Length
2.125 inches
Overall Height
1.375 inches
Overall Width
1.375 inches
Environmental Protection
Moisture proof and salt water resistant and vibration proof
Unthreaded Mounting Hole Diameter
Between 0.115 inches and 0.130 inches
Center To Center Distance Between Mounting Facilities Parallel To Height
1.062 inches
Distance Between Centerlines Of Mounting Facilities Parallel To Body Width
1.062 inches
Distance From Mounting Shoulder To Front Face
Between 0.750 inches and 0.781 inches
Threaded Device Type
Back shell and coupling facility
Mating End Quantity
1
Contact Position Arrangement Style
18-1 single mating end
Contact Removability
Removable single mating end all contact groupings
Contact Maximum Current Rating In Amps
22.0 single mating end all contact groupings
Contact Maximum Ac Voltage Rating In Volts
200.0 single mating end 2nd contact grouping
Contact Maximum Ac Voltage Rating In Volts
500.0 single mating end 1st contact grouping
Contact Maximum Dc Voltage Rating In Volts
250.0 single mating end 2nd contact grouping
Contact Maximum Dc Voltage Rating In Volts
700.0 single mating end 1st contact grouping
Polarization Method
Key, multiple key groove
Insert Position In Deg
0.0
Shell Type
Solid
Connector Locking Method
Externally threaded shell
Thread Length
0.290 inches and 0.625 inches
Thready Qty Per Inch (tpi)
18
Thread Size
1.062 inches and 1.125 inches
Terminal Location
Back single mating end all contact groupings
Contact Material
Copper alloy single mating end all contact groupings
Contact Surface Treatment
Gold single mating end all contact groupings
Insert Material
Silicon single mating end
Contact Surface Treatment Specification
Mil-g-45204 military specification single treatment response single mating end all contact groupings
Terminal Type
Crimp single mating end all contact groupings
Shell Material
Aluminum alloy
Shell Surface Treatment
Cadmium
Shell Surface Treatment Specification
Qq-p-416, type 2, class 3 federal specification single treatment response
Included Contact Quantity
4 single mating end 1st contact grouping
Included Contact Quantity
6 single mating end 2nd contact grouping
Included Contact Type
Round socket single mating end all contact groupings
Precious Material And Location
Contact surfaces gold
Precious Material And Weight
0.010 gold grains, troy
Precious Material
Gold
Test Data Document
81349-mil-c-5015 specification (includes engineering type bulletins, brochures, etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "", etc.).
Thread Series Designator
Unef
Specification Data
96906-ms3450 government standard
NSN
5935-01-077-2646
Part Number
X21-556-905
Description
Connector,receptacle,electrical
CAGE
S3712

An electrical fitting with electrical contacts constructed to be affixed to the end of a cable, conduit, coaxial line, cord, wire (includes printed/etched), printed wiring board, or the like for convenience in joining with another electrical connector(s) or printed wiring board. It is designed to be mounted on a bulkhead, chassis, panel, wall, printed wiring board, or the like. Excludes lampholder; jack, telephone; jack, tip; insert electrical connector; insert module, electrical connector; connector body (as modified) and socket, plug-in electronic components. See also wiring harness (as modified) and cable assembly (as modified). For items with termination wires of more than four inches in length, see lead assembly, electrical. For items without inserts, see shell, electrical connector.

Part X21-556-905 NSN 5935-01-077-2646

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
15093
FIIG:
A039B0
Concept No.:
App. Key:
K
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
P
PMIC:
G
ESD:
ESD:
MMAC:
EH
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
2.1 X 1.4 X 1.4
Paclk Weight:
0.1000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
061680
UFC:
34570
LTL:
RATING VARIABLE
LCL:
--
WCC:
658
TCC:
Z
SHC:
9
ACC:
Instruments/Radio

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Schedule B and Export
  • Schedule B: 8538907080
  • SITC: 77282
  • End Use: Electric apparatus
  • NAICS: 335314
  • USDA: 1

Freight Class: Parts suitable for use solely or principally with the apparatus for heading 8535, 8536,8537, nesoi

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