MIL-DTL-432H
AMERICAN SOCIETY FOR QUALITY (ASQ)
ASQ Z1.4
Sampling Procedures and Tables for Inspection by
Attributes
(Copies of this document are available from www.asq.org or the American
Society for Quality, 600 North Plankinton Avenue, Milwaukee, WI 53203.)
2.4 Order of precedence. Unless otherwise noted herein or in the
contract, in the event of a conflict between the text of this document and
the references cited herein, the text of this document takes precedence.
Nothing in this document, however, supersedes applicable laws and regulations
unless a specific exemption has been obtained.
3. REQUIREMENTS
3.1 First article When specified (see 6.2), a sample shall be subjected to
first article inspection in accordance with 4.2.
3.2 Material. Gaskets shall be made of various types of synthetic rubber
that will meet the requirements of this specification. Phosphonitrilic
fluoroelastomers have been found suitable for the type III, class 2 gaskets.
3.3 Design and dimensions. Design and dimensions of each type and class of
gasket shall be in accordance with figures 1 to 5, as applicable, and shall
be furnished in the size required (see 6.2).
3.4 Physical characteristics.
3.4.1 Hardness (Durometer). The gasket material (slabs of synthetic rubber
from which the gaskets are made) shall have a Durometer hardness as shown in
table I when tested as specified in 4.3.1.1. -
TABLE I. Hardness
Type
Hardness (Durometer)
I, VI
60-70
II
75-85
III
65-75
VII
40-50
3.5 Performance.
3.5.1 Volume change. The slabs of synthetic rubber material from which the
gaskets are made shall not swell more than 40 percent, and there shall be no
shrinkage when tested as specified in 4.3.1.1.
3.5.2 Weight change. Slabs of synthetic rubber material from which types I,
II, III, and VI gaskets are made shall not change more than 25 percent from
the original weight when tested as specified in 4.3.1.1.
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