MIL-DTL-23599B(AS)
4.5.3.1 Metal inspection. The rescue hooks and swivel fittings shall pass the following
inspection criteria:
a. For forged parts: 100 percent magnetic particle inspection in accordance with
ASTM 1444 and MIL-STD-1907, Grade A.
b. For cast parts: 100 percent radiographic inspection in accordance with ASTM E1742
and SAE-AMS 2175, Grade A and 100 percent magnetic particle inspection in accordance
with ASTM E1444 and SAE-AMS 2175, Grade A.
4.6 Strength tests. The rescue hooks shall be supported by a 0.375-inch round bar, to
simulate an MS20115 shackle, through the swivel fitting of the hook. The loads may be applied
by means of hydraulic or pneumatic press, jacks or equivalent high density material. The hook
shall support the loads specified in 3.3.1. The rescue hooks shall pass the listed criteria of the
following strength tests.
4.6.1 Static load test. The rescue hooks shall be loaded statically in order to determine the
load capacity of the hooks. This shall be accomplished through a static proof load test and a
static ultimate load test.
4.6.1.1 Static proof load test. The rescue hook shall be supported by the swivel fitting. All
proof loads defined in 3.3.1.1 shall be sustained for a period of 15 seconds to obtain the load
data. The hook and ring shall be checked dimensionally during the loading to assure absence of
elastic deformation. This is to ensure that the integrity of the safety latch and the positive
locking mechanism is not compromised. The swivel fitting shall also be checked dimensionally
during the loading to assure absence of plastic deformation.
4.6.1.2 Static ultimate load test. An ultimate static load test shall be performed on the
rescue hook and the auxiliary ring. The rescue hook shall be supported by the swivel fitting. All
ultimate loads defined in 3.3.1.2 shall be sustained for a period of 15 seconds to obtain the load
data. The auxiliary ring shall be tested in the same manner. Plastic deformation is allowed
under the condition that the safety latch is able to remain in a closed and locked position.
4.6.2 Dynamic load test. The rescue hook shall be loaded dynamically in order to ensure
the integrity of the hooks to repeatedly carry a load. The load shall be administered as stated in
4.6. The rescue hook shall be supported by the swivel fitting. The hook and auxiliary ring shall
be cycled 200,000 times at a load of 2,100 lb as stated in 3.3.1.3. The hook, auxiliary ring, and
swivel fitting shall support these loads through every cycle without plastic deformation. The
hook shall be loaded statically as stated in 4.6.1.2 after the load cycling has been completed.
4.7 Environmental tests. The rescue hook shall not suffer a decrease in structural integrity
or operability. The hook shall be tested as specified in 4.6.1.2 following each environment test.
Additionally, the operability of the hooks shall be demonstrated per 3.4 following each
environmental test.
9
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business