4710-01-490-4978 TUBE AND FITTINGS,METALLIC Index 5340-01-490-4980 BRACKET,MOUNTING

National Stock Number:
4820-01-490-4979

Federal Supply Class:
4820

National Item Identification Number:
014904979

Description:
VALVE,CHECK

Detail:
A valve permitting flow in one direction only. It does not have a stem, except when equipped with a lever and weight and has no pressure adjustment. It may be inline or cartridge (manifold) design.


Manufacturer Information:
M25675-F-481349MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
MIL-PRF-2567581349MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M


Techincal Specification:
CONNECTION STYLEFLARED (TUBE) ALL ENDS
CONNECTION TYPETHREADED EXTERNAL TUBE ALL ENDS
DISK LOADING METHODSPRING
FLOW CONTROL DEVICEDISK
OPENING PRESSURE SETTING5.0 POUNDS PER SQUARE INCH
MATERIALSTEEL CORROSION RESISTING BODY
MATERIALSTEEL CORROSION RESISTING SEAT
MAXIMUM OPERATING PRESSURE3000.0 POUNDS PER SQUARE INCH SINGLE RESPONSE
MAXIMUM OPERATING TEMP450.0 DEG FAHRENHEIT SINGLE RESPONSE
MEDIA FOR WHICH DESIGNEDFUEL/OIL, HYDROCARBON 3RD RESPONSE
MEDIA FOR WHICH DESIGNEDHYDRAULIC FLUID, PHOSPHATE-ESTER BASE 1ST RESPONSE
MEDIA FOR WHICH DESIGNEDHYDRAULIC FLUID, SILICATE-ESTER BASE 2ND RESPONSE
MOUNTING POSITIONHORIZONTAL
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES ALL ENDS
NOMINAL THREAD SIZE0.437 INCHES ALL ENDS
SEAT ANGLE37.0 DEGREES ALL ENDS
SPECIAL FEATURESTORQUE ON -4 SIZE IS 125 +/-10 INCH POUNDS,MIL-H-8891 FLUID COMPATABLE.
STYLE DESIGNATORSTRAIGHT THRU
THREAD CLASS3A ALL ENDS
THREAD DIRECTIONRIGHT-HAND ALL ENDS
THREAD QUANTITY PER INCH20 ALL ENDS
THREAD SERIES DESIGNATORUNF ALL ENDS


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