Textron - BOLT - AN4-11A
Genuine OEM Part
Description: BOLT
Part number: AN4-11A
Length: 1-5/32", grip: 11/16", thread: 1/4-28, cadmium plated steel, undrilled shank, AN4 series bolt
AN Bolts are manufactured to the "Army-Navy" military standard, predecessor to "Mil-Spec" (MS) and "National Aerospace Standard" (NAS) which followed.
AN Bolts are typically cadmium plated for superior corrosion resistance when compared to commercial grade zinc plated bolts. Threads are pressed into the steel, not cut, thus maintaining strength throughout the shank. The surface under the head of AN bolts is designed to be a bearing surface to reduce non-uniform stress as the bolt is torqued thus reducing premature fatigue.
AN Bolts
• Made of high-strength type 4037 or 8740 alloy steel
• Centerless ground & threaded
• Minimum tensile strength 125,000 PSI
• Cadmium plated per spec QQ-P-416A, Type II, Class 3
• 431 Stainless steel (CRES)
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