FF-S-85D
3.9.1.5 Folds. Folds may occur at or near the intersection of diameter changes.
Folds at exterior corners are permissible discontinuities if within the limits
specified in 4.4.9.3. Typical folds are shown in figure 7.
3.9.1.6 Bursts. Cap screws may possess bursts that occur at the flat of the
head of screws if within the limits specified in 4.4.9.4. Typical bursts are
shown in figure 7.
3.9.2 Thread discontinuities. (Laps, seams, and surface irregularities).
Threads shall have no laps at the root or along the flanks as shown in figure 6.
Laps are permissible at the crest but shall not exceed 25 percent of the basic
thread depth. Slight deviation from the thread contour is permissible at the
crest of the thread as shown in figure 6. Magnetic inspection techniques may be
used in accordance with 4.4.9.
3.9.3 Cracks.
Cap screws shall be free from cracks in any direction or
location.
3.9.3.1 Quench cracks. Quench cracks may occur during heat treatment and
usually traverse an irregular and erratic course on the surface of the screw.
They shall be examined as specified in 4.4.9. Typical quench cracks are as shown
in figure 7.
3.9.3.2 Forging cracks. Forging cracks may occur during the cut-off or forging
operations and are located on the top of the head of screws. They shall be
examined as specified in 4.4.9. Typical forging cracks are shown in figure 7.
4.
QUALITY ASSURANCE PROVISIONS
4.1 Responsibility for inspection. The contractor is responsible for the
performance of all inspection requirements as specified herein. Except as
otherwise specified, the supplier may use his own or any other facilities suitable
for the inspection requirements specified herein, unless disapproved by the
Government. Inspection records of the examination and tests with itemized results
shall be kept complete at the manufacturer's facility, available to the Government
throughout the duration of the contract, or a minimum of two years, whichever is
longer. The Government reserves the right to perform any of the inspections set
forth in the specification where such inspections are deemed necessary to assure
supplies and services conform to prescribed requirements.
4.1.1 Responsibility for compliance. All items shall meet all requirements of
sections 3 and 5. The inspection set forth in this document shall become a part
of the contractor's overall inspection system or quality program. The absence of
any inspection requirements in this document shall not relieve the contractor of
the responsibility of ensuring that all products or supplies submitted to the
Government for acceptance comply with all requirements of the contract. Sampling
inspection, as part of manufacturing requirements, is an acceptable practice to
certain conformance to requirements, however, this does not authorize submission
of known defective material either indicated or actual, nor does it commit the
Government to accept defective material.
4.1.2 Component and material inspection. Components and materials shall be
inspected in accordance with all the requirements specified herein and in
application referenced documents.
4.1.3 Examination of preparation for delivery. An examination shall be made to
determine that the packaging, packing and marking comply with the requirements in
Section 5 of this specification.
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