MIL-PRF-29250C
3.21.3 Bolted connections. Bolt holes shall be accurately punched or drilled and shall have the
burrs removed. Washers or lockwashers shall be provided in accordance with good commercial
practice, and all bolts, nuts, and screws shall be tight.
3.21.4 Riveted connections. Rivet holes shall be accurately punched or drilled and shall have the
burrs removed. Rivets shall be driven with pressure tools and shall completely fill the holes.
Rivet heads, when not countersunk or flattened, shall be of approved shape and of uniform size
for the same diameter of rivet. Rivet heads shall be full, neatly made, concentric with the rivet
holes, and in full contact with the surface of the member.
3.21.5 Welders and welding.
3.21.5.1 Welders. Before assigning any welder to manual welding work covered by this
specification, the contractor shall provide the contracting officer with certification that the welder
assigned to perform welding responsibilities covered by this specification has passed the
qualification test as prescribed by AWS D1.1, section 5, for the type of welding operations to be
performed and that such qualifications are effective as defined by the code.
3.21.5.2 Welding. Welding procedures shall be in accordance with a nationally recognized
welding code. The surface of parts to be welded shall be free from rust scale, paint, grease, or
other foreign matter. Welds shall be of sufficient size and shape to develop the full strength of the
parts connected by the welds. Welds shall transmit stress without permanent deformation or
failure when the parts connected by the weld are subjected to proof and service loadings.
3.21.6 Castings. All castings shall be sound and free from patching, misplaced coring, warping,
or any other defect which reduces the casting's ability to perform its intended function.
4. VERIFICATION
4.1 Classification of inspections. The inspection requirements specified herein are classified as
follows:
a. First article inspection (see 4.1.1).
b. Quality conformance inspection (see 4.1.2).
4.1.1 First article inspection. The first article inspection shall be performed on one complete
ILJS when a first article is required (see 3.1 and 6.2). This inspection shall include the
examination of 4.3, the tests of 4.4.4 and 4.4.5, and the inspections of 4.5 and 4.6 specified in
table II. The first article may be either a first production standard item from the supplier's current
inventory provided the item meets the requirements of the specification and is representative of
the design, construction, and manufacturing technique applicable to the remaining items to be
furnished under the contract.
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