5330-00-202-2171 GASKET Index 3940-00-202-2179 BLOCK,TACKLE

National Stock Number:
9320-00-202-2177

Federal Supply Class:
9320

National Item Identification Number:
002022177

Description:
BELLOWS,PROTECTION

Detail:
A nonmetallic, accordian shaped protective covering designed to flex due to relative motion between parts to which its opposite ends are attached. It is primarily used to cover the opening around a movable push-pull rod or part passing through a hole in a bulkhead, partition or the like.


Manufacturer Information:
763199119200US ARMY ARDEC RDECOM
MILR306581349MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M


Techincal Specification:
DUROMETER HARDNESS RATING35.0 MINIMUM AND 45.0 MAXIMUM
FEATURES PROVIDEDFLANGED BASE
LARGE END INSIDE DIAMETER2.000 INCHES NOMINAL
LARGE END INSIDE LENGTH0.250 INCHES NOMINAL
LARGE END OUTSIDE DIAMETER2.750 INCHES NOMINAL
LARGE END OUTSIDE LENGTH0.210 INCHES NOMINAL
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-STD-417, TYPE R, CLASS RS, GRADE 410A1BF2 MIL STD SINGLE MATERIAL RESPONSE
MATERIALRUBBER SYNTHETIC
MOUNTING HOLE DIAMETER0.125 INCHES MINIMUM AND 0.135 INCHES MAXIMUM
MOUNTING HOLE QUANTITY8
NEUTRAL LENGTH3.250 INCHES NOMINAL
SPECIAL FEATURESBELLOWS MUST NOT LEAK UNDER 5 LBS PRESSURE
SMALL END OUTSIDE DIAMETER2.250 INCHES NOMINAL
THICKNESS0.040 INCHES MINIMUM AND 0.045 INCHES MAXIMUM


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