F-F-351F
f. Color of exterior finish, if different from standard commercial finish (see 3.4.1.1
and 3.4.1.2.1.1).
g. Type of mounting, i.e., straps, brackets, or other suitable means (see 3.4.1.6.1).
h. When oil lines and fittings are required (see 3.4.1.6.1).
i. When type II filter elements are for replacement usage (see 3.4.2).
j. If a pullout device is required in a Type IV, class 4 element (see 3.4.3.2)
k. If a standard production item is to be submitted (see 4.3).
l. How sampling for conformance inspection should be determined (see 4.4.1).
m. How lot formation should be determined (see 4.4.2).
n. Any additional CI tests required (see 4.4.4)
o. When test tolerances and ambient test conditions are to be other than specified
(see 4.5.2 and 4.5.3).
p. Whether reference test oil to be used should be other than as specified (see 4.5.5).
q. Levels of preservation, packaging and packing required (see 5.1).
r. Any additional marking requirements (see 5.1).
6.3 Inspection for first article. When first article inspection is required, the contract
should provide specific guidance to contractors as to the method for selecting samples for the
inspection. The contract should also provide specific guidance as to whether the item(s) should
be a first article sample, a first production item, or a standard production item from the
contractor's current inventory. The contract should include specific instructions in acquisition
documents regarding arrangements for examinations, approval of the first article test results, and
disposition of the first articles. Invitations for bids should provide that the Government reserves
the right to waive the requirements for samples for first article inspection to those bidders offering
a product which has been previously acquired or tested by the Government, and that bidders
offering such products, who wish to rely on such production or test, must furnish evidence with
the bid that prior Government approval is presently appropriate for the pending contract.
6.4 Definitions.
6.4.1 Standardization contaminant. For use in blending the standardized contaminant
(see 4.5.6), the materials described in 6.4.2 through 6.4.5 have been found satisfactory.
6.4.2 Carbon black. One brand of this material is designated as "Raven 450-powder",
advertised particle size 85 nanometers, offered by Colombian Chemicals Company,
1600 Parkwood Circle, Atlanta, GA 30339.
6.4.3 Ferric oxide. A brand of this material is designated "Chemically Pure Ferric Oxide"
and is offered by Microfab Inc., P.O. Box 1092, Park Ridge, IL 60068. It has been found that
95 percent of the particles are in the range from 0 to 5 microns.
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