Shearing and chipping shall be done neatly and accurately. Corners shall be square and true, and
sharp edges and burrs shall be removed. Flame-cutting may be employed instead of shearing and
sawing. Burned surfaces of flame-cut material shall be ground or machined sufficiently to
remove ash and cooling checks. Precautions shall be taken to avoid overheating, and heated
metals should be allowed to cool slowly. All bends of a major character shall be made with
metal dies or fixtures to insure uniformity of size and shape.
3.28.2 Welding. The surfaces of parts being welded shall be free of scale, paint, grease, and
other foreign matter. Welds shall transmit stress without permanent deformation of failure when
the parts connected by the welds are subjected to proof and service loading.
18.104.22.168 Welding qualification. Welders shall be qualified in accordance with
ASME code IX or AWS D1.1 or D1.2 for the applicable item and material.
3.28.3 Bolted connections. Bolt holes shall be accurately punched or drilled and shall have
the burrs removed. Bolt holes in structural members subject to variable loads shall be punched
or drilled. Washers or lockwashers shall be provided where necessary. All bolts, nuts, and
screws shall be correctly torqued. Matching thread areas securing bolts or capscrews shall be of
sufficient strength to withstand the tensile strength of the bolt. Bolts shall not extend more than
5 threads outward from their associated nuts.
3.28.4 Riveted connections. Rivets shall fill the holes completely. The upset rivet heads
shall be full, neatly made, concentric with the rivet holes, and in full contact with the surface of
the member and shall be in accoroance with SAE J492.
3.28.5 Machine work. Tolerances and gauges for metal fits shall conform to the limitation
4. QUALITY ASSURANCE PROVISIONS
4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase
order, the contractor is responsible for the performance of all inspection requirements as
specified herein. Except as otherwise specified in the contract or purchase order , the contractor
may use his own or any other facilities suitable for the performance of the inspection
requirements specified herein, unless disapproved by the Government. 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
4.1.1 Responsibility for compliance. All items must meet all requirements of sections 3
and 5. The inspection set forth in this specification shall become a part of the contractor's overall
inspection system or quality program. The absence of any inspection requirements in the
specification shall not relieve the contractor of the responsibility of assuring that all products or