ZZ-V-25E
3.3.1.3 Bridge washer. Each type I, class 2, style A and Class 7 valve shall, when specified (see
6.2), be furnished with a bridge washer suitable for its intended purpose.
3.3.2 Cap. Unless otherwise specified (see 6.2) , caps shall be furnished and shall conform to the
applicable reference (see 1.2.1) and may be screwdriver, swivel sealing type (TR VC2) , dome, swivel
sealing type (TR VC3 ) or dome, polyethylene dust cover type (TR VCB).
3.3.3 Core.
3.3.3.1 Core fit. Unless otherwise specified (see 6.2) , cores shall conform to the applicable
reference (see 1.2.1) . Cores supplied for replacement shall fit as do original cores without modification
of cores or valves.
3.3.3.2 Deflation by core Cores shall be so constructed that when installed for use, tire pressure
can be decreased by depressing the core plunger pin. It shall not be necessary to remove e core from
th
the valve to deflate the tire or tube.
3.3.3.3 Core plunger pin height. Core design shall be such that when the core is properly lns.tailed,
the tip-on the core plunger pin shall position .035" below to .010" above the valve lip.
3.3.4 Spud.
Unless otherwise specified (see 6 .2) , spuds shall conform to the applicable reference
(see 1.2.1).
3.3.5 Grommet. Unless otherwise specified (see 6.2) , grommet design characteristics shall conform to
MS-52120 (AT) and be capable of its Intended purpose.
3.3.6 Nut, hexagon,plain. Unless otherwise specified (see 6.2) , design characteristics shall reform
to MS-52119 (AT) and be capable of its intended purpose .
3.4 Physical properties.
3 4.1 Valves.
Valves with rubber bases shall conform to the pull values of Table I.
3.4.1.1 Tensile strength.
TABLE I.
Least allowable tensile strength values
Class
100
1
I
2
300
100
3
4
100
100
5
100
6
III
1
300
300
2
4
300
3.4 .1.2 Valve stern base closure. Valves, type 1, classes 5 and 6, shall have sufficient spinning or
closing of the inner well of the metal groove to effect a mechanical lock of the rubber in the groove.
There shall be no cracks or flaws in the stem wall.
Valves, type 11, class 1, shall have no cuts or cracks in the
3.4.1.3 Crack resistance of rubber.
rim-hole sealing area.
3.4.1.4 Distortion resistance Valves, type I, classes 1 and 5, shall be of such a strength and
hardness as to prevent distortion or other damage when subjected to proper field mounting and servicing
3.4.1.5 valve bendability
Valves, type i, class 1, style B, and class 5, style B, shall permit
3.4.1 .5.1 Hard-bendable valves
hard-bending once without cracking.
3.4.1 .5.2 Tool-bendable valves. Valves, tyupe I, class 2 {except TR70) , and TR87 from class 3, style
A, shall permit tool-bending once without cracking.
4
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