4820-01-385-6738 GUIDE,VALVE STEM Index 4320-01-385-6740 PUMP,RECIPROCATING

National Stock Number:
5365-01-385-6739

Federal Supply Class:
5365

National Item Identification Number:
013856739

Description:
SPACER,PLATE

Detail:
A flat metal or plastic item of various peripheral shapes having a solid (not laminated) cross-section. It is designed to maintain a predetermined distance between two surfaces. For round items without a hole having a solid rectangular cross-section use DISK, SOLID, PLAIN. For round or hexagonal items with only one hole centrally located and with the length (thickness) exceeding 25 percent of the outside diameter or distance across peripheral flats, see SPACER, SLEEVE. The thickness between the two parallel bearing surfaces must be 0.006 inch, (0.152 mm) or more for items less than 1/4 inch (6.35 mm) across the peripheral diameter, or smallest overall outside dimension, or must be 0.016 inch (0.406 mm) or more for items 1/4 inch (6.35 mm) or greater across the peripheral diameter or smallest overall outside dimension. For items with a thickness less than those indicated above, see SHIM. For items with one hole centrally located conforming to the above dimensional criteria use WASHER, FLAT or SPACER, RING as applicable. When thickness and/or outside diameter or smallest overall outside dimension is designated as a tolerance/dimension the maximum dimension will be used to determine compliance. Excludes GASKET; INSULATOR (as modified) and MOUNTING PAD, ELECTRICAL-ELECTRONIC COMPONENT.


Manufacturer Information:
4M341N576301THE BOEING COMPANY


Techincal Specification:
APERTURE DIAMETER0.540 INCHES MINIMUM AND 0.550 INCHES MAXIMUM
BOLT HOLE QUANTITY2
HOLE DIAMETER0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/4, COND 81 FED SPEC SINGLE MATERIAL RESPONSE
MATERIALALUMINUM ALLOY 2024
OVERALL THICKNESS0.037 INCHES MINIMUM AND 0.043 INCHES MAXIMUM
SPECIAL FEATURESAPERATURE AND BOLT HOLES ARE COUNTERSUNK
SIDE RADIUS FROM GASKET CENTER0.370 INCHES NOMINAL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE
SURFACE TREATMENTANODIZE


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