5985-01-138-8404 COUPLER,ANTENNA Index 6685-01-138-8406 THERMOSTAT,FLOW CONTROL

National Stock Number:
5305-01-138-8405

Federal Supply Class:
5305

National Item Identification Number:
011388405

Description:
SCREW,CAP,SOCKET HEAD

Detail:
An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes items with bevel (conical) heads. See BOLT, INTERNAL WRENCHING. Excludes SCREW, SHOULDER; and SCREW, MACHINE.


Manufacturer Information:
0N274705-798230NATIONAL SECURITY AGENCY


Techincal Specification:
FASTENER LENGTH1.819 INCHES MINIMUM AND 1.850 INCHES MAXIMUM
HEAD DIAMETER0.370 INCHES NOMINAL
HEAD HEIGHT0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM
HEAD STYLEUNDERCUT PAN NO. 2
INTERNAL DRIVE STYLEHEXAGON
PROPRIETARY CHARACTERISTICSPACS
NOMINAL THREAD DIAMETER0.250 INCHES
WIDTH ACROSS FLATS0.188 INCHES NOMINAL
THREAD CLASS3A
THREAD DIRECTIONRIGHT-HAND
THREAD QUANTITY PER INCH28
THREAD SERIES DESIGNATORUNC


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