Castrol Brayco® 300 Lubricating Oil General Purpose - MIL-PRF­-32033

Castrol Brayco® 300 is a blend of highly refined petroleum oil with suitable additives which provide corrosion prevention, oxidation resistance, and freedom from galvanic corrosion in brass-steel bimetallic systems. The viscosity is similar to a light machine oil. Castrol Brayco® 300 is a water displacing oil for general purpose applications at low and medium temperatures (-70ºF to 300ºF).

UsesCastrol Brayco® 300 is designed for the lubrication and preservation of small arms, automatic weapons, and fuse mechanism applications, especially where a low temperature, water displacing oil is desired. It may be used to protect unpainted metal surfaces from the effects of indoor storage for periods of three to six months, after which it remains readily removable. Castrol Brayco® 300 will also protect magnesium and aluminum against corrosion at low and medium temperatures (-70ºF to 300ºF).

TEST METHOD DESCRIPTION MIL-PRF-32033 REQUIREMENTS RESULT D287 API Gravity, degrees Report 28.4 Table 3 Specific Gravity @ 16°C/16°C (60°F/60°F) Report 0.8849 Table 8 Pounds Per Gallon @ 16°C (60°F) Report 7.368 D1500 Color, ASTM 7.0 Maximum 4.0 D97 Pour Point, °C (°F) -57 (-70) Maximum -57 (-70) D445 Viscosity, cSt     @ 40°C (104°F)     @ -40°C (-40°F)     @ -54°C (-65°F) 11 Minimum 7,000 Maximum 60,000 Maximum 11.2 4,290 53,100 D92 Flash Point, COC, °C (°F) 135 Minimum 142 (285) D91 Precipitation Number, ml 0.05 Maximum 0.01 D972 Evaporation Loss, % wt 22 hours @ 100°C (212°F) 25 Maximum 11.2 FTM 5308 Corrosion-Oxidation Stability, 168 hours @ 121°C (250°F) Corrosion, Pitting, or Etching Wt Change, mg/cm2      Copper      Steel      Aluminum      Magnesium      Cadmium      Change in Viscosity @ 40°C (104°F), %      Change in Neutralization No.      Insoluble Materials and Gum None 0.2 Maximum 0.2 Maximum 0.2 Maximum 0.2 Maximum 0.2 Maximum -5 to +20 0.20 Maximum None None +0.002 +0.012 -0.009 +0.009 +0.008 +4.3 0.06 None D130 Copper Strip Corrosion, 3 hours @ 100°C (212°F) 2a Maximum 1a FTM 5329 Humidity Cabinet-SB Panels - 192 hours Pass Pass FTM 3007 Water Displacement Water Stability Pass Pass Pass Pass FTM 202 Low Temp. Stability, 72 hours @ -54°C (65°F) Pass Pass FTM 5322 Corrosiveness, 10 days (240 Grit) Pass Pass Spec Film Characteristics Pass Pass Spec Removability Pass Pass D4172 Four-Ball Wear-Test, AWSD, mm 1 Maximum 0.7 Spec Workmanship Pass Pass

Health, safety and environmental information are provided for this product in the Materials Safety Data Sheet. This gives details of potential hazards, precautions and First Aid measures, together with environmental effects and disposal of used products. castrol will not accept liability if the product is used other than in the manner or with the precautions or for the purpose (s) specified. Before using the product other than directed, please contact Castrol for consultation.

Applications

Castrol Brayco® 300 may be applied by brush, dip, swab, spray, or squirt can.

Depending on the method of application and surface geometries, Castrol Brayco® 300 will cover 1,000 to 3,000 square feet per gallon.

For water displacement, it may be applied by these same methods. Displaced water should be removed from dip tanks at suitable intervals.