MACHINE BOLT - AN5-4A
Aeronautical Standard Part
Description: MACHINE BOLT, Pan Head - Undrilled Shank
Part Number: AN5-4A
Product Overview
An externally threaded fastener designed for insertion through holes in assembled parts and normally intended to be tightened or released by torquing a nut. The threaded and unthreaded portions are both of one nominal diameter of 0.190 inch (5 mm) or larger. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards.
AN5-4A Features
| PARAMETER | CHARACTERISTICS | |
| Thread Class: | 3A | |
| Thread Direction: | Right-hand | |
| Thread Length: | 0.532 inches minimum | |
| Fastener Length: | 0.594 inches nominal | |
| Head Style: | Hexagon | |
| Head Height: | 0.172 inches minimum and 0.204 inches maximum | |
| Width Between Flats: | 0.490 inches minimum and 0.502 inches maximum | |
| Nominal Thread Diameter: | 0.312 inches | |
| Grip Length: | 0.062 inches nominal | |
| Features Provided: | Finished head | |
| Thread Quantity per Inch: | 24 | |
| Minimum Tensile Strength: | 125000 pounds per square inch | |
| Hardness Rating: | 26.0 rockwell C minimum overall and 32.0 rockwell C maximum overall | |
| Material: | Steel comp 4037 overall or steel comp 4130 overall or steel comp 8630 overall or steel comp 8735 overall or steel comp 8740 overall or steel comp 4140 overall | |
| Material Document and Specification: | MIL-B-6812 mil spec all material responses overall | |
| Surface Treatment: | Cadmium overall and chromate overall | |
| Surface Treatment Document and Classification: | QQ-P-416 TY2, CL3 fed spec all treatment responses overall | |
| Thread Series Designator: | UNF |
This part is used on the following aircraft:
- •Textron Aviation Beechcraft King Air 100 - all variants
- •Textron Aviation Beechcraft King Air 200 - all variants
- •Textron Aviation Beechcraft King Air 300 - all variants
- •Textron Aviation Beechcraft King Air 90 - all variants
- •Textron Aviation Beechcraft Premier
- •Textron Aviation Cessna 650 Citation III-IV-VI-VII