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National Stock Number:
5365-00-427-8059
Federal Supply Class:
5365
National Item Identification Number:
004278059
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:
| 65103-11339-101 | 78286 | SIKORSKY AIRCRAFT CORPORATION |
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Techincal Specification:
| HARDNESS RATING | 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM | | INSIDE DIAMETER | 2.815 INCHES MINIMUM AND 2.820 INCHES MAXIMUM | | OUTSIDE DIAMETER | 3.115 INCHES MINIMUM AND 3.135 INCHES MAXIMUM | | OVERALL THICKNESS | 0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-T-6736,TYPE 1,COND A OR N MIL SPEC ALL MATERIAL RESPONSES | | MATERIAL | STEEL COMP 321 OR STEEL COMP 347 | | SURFACE FINISH | 90.0 MICROINCHES LEFT SIDE | | SURFACE FINISH | 90.0 MICROINCHES RIGHT SIDE | | SURFACE FINISH | 90.0 MICROINCHES BORE | | SURFACE FINISH | 90.0 MICROINCHES LARGEST OUTSIDE DIAMETER | | SURFACE TREATMENT | OXIDE |
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