4820-01-530-8021

A thin flat metal or plastic item of various peripheral shapes having a solid or laminated cross-section. It is designed to maintain a predetermined distance between two surfaces. For round items without a hole and having a solid rectangular cross-section use disk, solid, plain. Items with either (1) a solid (not laminated) cross-section, or (2) a non-separable laminated cross-section with one hole centrally located, must have a thickness less than 0.006 inch (0.152 mm) for items less than 1/4 inch (6.35 mm) outside diameter or shortest distance across peripheral flats, and less than 0.016 inch (0.406 mm) for items 1/4 inch (6.35 mm) or more outside diameter, or shortest distance across peripheral flats. For items with thickness greater than those indicated above, see spacer, plate; washer, flat and spacer, ring. When thickness and/or outside diameter or shortest distance across peripheral flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance. See also shim stock, laminated; shim stock assortment, gasket; and bearing, washer, thrust.

"valve has 3 ports: inlet/outlet iaw ms33649-16 1.00 t.s.; actuating port iaw ms33649-4 .25 t.s.; pilot valve with proximity swith and open indicator iaw northrop grumman 3a05328 with external electrical connecter p/n ming3 (no. 16)-cdrl-(ti) with minimum length of 12" on pigtail, terminated with a seacon connector; media: seawater, max psi 225, max. differential across inlet/outlet up to 20 psid, pneumatic air pressure varies from 1500-4500 psig, operating with air pressure as low as 100 psig; end connections: butt weld. pilot valve eseod shall be .90 nom. 0.85 min., 1.03 maximum orifice" special features, vent valve fbs (freeboard ballast system) part name assigned by controlling agency, p/n 5793295 nose assembly end item identification