BOLT - AN4-3A
Aeronautical Standard Parts
Description: BOLT
Part number: AN4-3A
Industry Standard Specification: AIA/NAS NASM3-20
Airframe Bolt - Length: 15/16", Grip: 1/16", Thread: 1/4-28, Cadmium Plated Steel, Undrilled Shank
AN4-3A FEATURES
| Parameter | Characteristics | ||
| Thread Class | : | 3A | |
| Thread Direction | : | Right-hand | |
| Thread Length | : | 0.407 inches maximum | |
| Fastener Length | : | 0.469 inches nominal | |
| Head Style | : | Hexagon | |
| Head Height | : | 0.140 inches minimum and 0.172 inches maximum | |
| Width Between Flats | : | 0.428 inches minimum and 0.440 inches maximum | |
| Hole Diameter | : | 0.046 inches nominal | |
| Nominal Thread Diameter | : | 0.250 inches | |
| Grip Length | : | 0.062 inches nominal | |
| Hole Quantity | : | 1 | |
| Hole Type | : | Drilled | |
| Features Provided | : | Finished head | |
| Thread Quantity per Inch | : | 28 | |
| Minimum Tensile Strength | : | 125000 pounds per square inch | |
| Hardness Rating | : | 26.0 rockwell C minimum overall and 32.0 rockwell C maximum overall | |
| Hole Configuration Style | : | Hexagon flats | |
| 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 Classification | : | MIL-B-6812 mil spec all material responses overall | |
| Surface Treatment | : | Cadmium overall and chromate overall | |
| Surface Treatment Document and Classification | : | QQ-P-416, type 2, class 3 fed spec all treatment responses overall | |
| Thread Series Designator | : | UNF |
This part is used on the following aircraft:
- • Embraer Legacy 600-650
- • Textron Aviation Beechcraft King Air 200 - all variants
- • Textron Aviation Cessna 500 Citation I-ISP
- • Textron Aviation Cessna 525 Citation Citationjet
- • Textron Aviation Cessna 550 Citation I-II-Bravo
- • Textron Aviation Cessna 560 Citation V-Ultra-Encore-Excel-XLS
- • Textron Aviation Cessna 650 Citation III-IV-VI-VII
- • Textron Aviation Cessna 750 Citation X
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