Loctite 242. Application: LT5 Fasteners as per GM LT5 Service Manual.  10ml bottle.

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Loctite® 242® Medium Strength Blue Threadlocker is a general purpose, removable threadlocker for fasteners between 1/4" and 3/4" (6 to 20 mm) diameters. Controlled lubricity for accurate clamp loads. Parts can be separated using hand tools.

Specifications:

• Color: Blue
• Fastener Size: 1/4" ~ 3/4" (20mm)  
• Temperatue Range: -65° to 300°F
• Cure Speed, Steel @ 10°C: Fixture - 10 minutes (5 minutes w/primer); Full Strength - 24 hrs
• Recommended Primer: 7649 Primer