* M224: Tighten the self-locking screw
and nuts to 10 + 2 lb-ft (13.6 + 2.7 N x m).
These feature self-locking screw
clamp connection technology for a maintenance-free and vibration-proof connection.
Don't remove the self-locking screw
in the buttstock.
The new hardware replaces the original self-locking screw
and nut that protruded from the inside of your helmet.
Fig 1231 Item Name NSN 1 Self-locking screw
5310-01-369-6706 3 M16 cap screw 5305-01-369-8253 4 Machine bolt 5306-01-369-8192 6 Flat washer 5310-01-369-8923 7 Self-locking nut 5310-01-369-3339 Fig 1232 Item Name NSN 1 Cap screw 5305-01-433-8469 2 Flat washer 5310-01-158-9053 3 Self-locking nut 5310-01-369-6706 5 Cap screw 5305-01-369-2264
Once the self-locking screw
is removed, it no longer stays tight and the buttstock can turn during firing.
The upper handguard rail has a self-locking screw
that must be replaced with a new screw when it's removed.
If the socket head cap self-locking screw
is removed for any reason, it must be replaced with a new one.
The developers also switched from using safety wire to self-locking screws
, which eliminated the cost of safety wire, reduced foreign-object damage and reduced manufacturing and life-cycle costs.
Nine of the top 10 items stolen from vehicles can be easily removed when you park, and the tenth item, vehicle registration plates, can be protected by self-locking screws
Nine of the top 10 items stolen from vehicles can be easily removed when you park and the 10th item, vehicle registration plates, can be protected by self-locking screws