crwdns2936637:0crwdne2936637:0 crwdns2853008:0crwdne2853008:0 crwdns2918746:0crwdne2918746:0

crwdns2944351:0crwdnd2944351:0Repairing the Proline Guitar Strap Lock Springcrwdnd2944351:0crwdne2944351:0

crwdns2933797:0Justin Smithcrwdnd2933797:0crwdne2933797:0

crwdns2936043:0crwdne2936043:0 crwdns2933505:0crwdne2933505:0 Justin Smith

crwdns2933769:0crwdne2933769:0
crwdns2933771:0crwdne2933771:0
crwdns2933801:0crwdne2933801:0
Conclusion
Your strap lock should now function well, but make sure to hand test the locking strength before using your guitar. As for the replacement spring, it is hard to buy a spring of this size individually. The dimensions of the spring are approximately as follows:
Inner Diameter: 4.5 mm (.177 in)
Outer Diameter: 5.3 mm (.209 in)
Free Length: 7.8 mm (. 307 in)
As stated in step 2, if you cannot get a spring of this exact size, it is possible to cut a spring from a pen to length, and with a little stretching get it to the right dimensions.