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National Stock Number:
5365-99-427-5878
Federal Supply Class:
5365
National Item Identification Number:
994275878
Description:
SPACER,RING
Detail:
A circular-shaped item designed to maintain predetermined distance between assembled parts and/or for distributing pressure or preventing endwise movement between member parts. It has a solid cross-section and two flat parallel bearing surfaces. The distance between the bearing surfaces perpendicular to the axis of the centrally located hole shall not exceed 25 percent of the outside diameter. The diameter of the centrally located hole must exceed 75 percent of the outside diameter. Excludes laminated items. For items manufactured from impregnated graphite or lubricated nonmetallic materials, excluding felt or plastics, see GASKET. For items manufactured from lubricated plastics, see BEARING, WASHER, THRUST. For items manufactured from lubricated felt, see FELT, MECHANICAL, PREFORMED. Excludes DISK, VALVE; INSULATOR WASHER; and SHIM. See also SPACER, PLATE and SPACER, SLEEVE.
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Manufacturer Information:
| B507831 | K0378 | ROLLS-ROYCE PLC |
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Techincal Specification:
| HARDNESS RATING | 300.0 VICKERS MINIMUM AND 340.0 VICKERS MAXIMUM | | INSIDE DIAMETER | 3.884 INCHES MINIMUM AND 3.893 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | MSRR 6001 MFR REF SINGLE MATERIAL RESPONSE | | MATERIAL | STEEL | | OUTSIDE DIAMETER | 4.255 INCHES MINIMUM AND 4.265 INCHES MAXIMUM | | OVERALL THICKNESS | 0.276 INCHES MINIMUM AND 0.278 INCHES MAXIMUM | | SPECIAL FEATURES | 3 BOLT HOLES THD 0.086-56 UNJC-3B,CHAMFERED INT EDGES 0.030 IN. BY 45 DEG | | SURFACE FINISH | 63.0 MICROINCHES LEFT SIDE | | SURFACE FINISH | 63.0 MICROINCHES RIGHT SIDE | | SURFACE FINISH | 125.0 MICROINCHES BORE |
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