TABLE VI. Group B inspections. 1/
Minimum strength test
Salt spray test
1/ If the manufacturer can demonstrate that the periodic tests have been performed for two
consecutive years with zero failures, then the frequency of the periodic test, with the approval of the
qualifying activity, can be performed every fourth year.
4.5 Inspection lot.
4.5.1 Lot and sample. The inspection lot shall be product selected at random from the production lot
without regard to quality and shall be the sample size specified in table VII.
TABLE VII. Lot and sample size.
1 to 90
91 to 150
151 to 280
281 to 500
501 to 1200
1201 to 3200
3201 to 10,000
10,001 to 35,000
4.5.2 Lot records. Manufacturers shall keep lot records for 3 years minimum. Manufacturers shall
monitor for compliance to the prescribed procedures, and observe that satisfactory manufacturing
conditions and records on lots are maintained for these hooks. The records, including as a minimum, an
attributes summary of all quality conformance inspections conducted on each lot, shall be available to
review by customers at all times.
4.6 Proof test. Each sample hook selected in accordance with 4.5.1 shall be proof tested to twice
the safe working load. The pull shall be in direct alignment with the centerline of the hook.
4.7 Strength test. Each sample hook selected in accordance with 4.5.1 shall be tested to four times
the safe working load specified in table III.
4.8 Salt spray test. Fittings when subjected to corrosion resistance testing in accordance with ASTM
B633 and ASTM-B117, shall meet the requirements of 3.4.
4.9 Possible test failures.
a. Proof test load. Evidence of deformation, distortion or permanent set, or sign of incipient
cracks after subjecting hook to stipulated proof test load.
b. Minimum ultimate strength test. Ultimate strength of hook less than four times the safe