Aeronautical Standard - Machine Bolt - AN4-16
Standard Part
Description: Machine Bolt
Part Number: AN4-16
Alternate Part Numbers: 241-10, 81147
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 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. for items having a grip length portion machined to a tolerance of 0.0015 inch (0.038 mm) or less, bolt, shear. See also screw, cap, hexagon head and screw, machine.
Item Specification:
| Thread Class | 3A | |
| Thread Direction | Right-hand | |
| Thread Length | 0.469 inches minimum | |
| Fastener Length | 1.781 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 | |
| Shank Unthreaded Hole Diameter | 0.076 inches nominal first hole | |
| Nominal Thread Diameter | 0.250 inches | |
| Grip Length | 1.312 inches nominal | |
| 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 | |
| Distance from Head Largest Bearing Surface to Shank Hole Center | 1.624 inches nominal first hole | |
| Material | Steel comp 8740 overall or steel comp 8630 overall or steel comp 8735 overall or steel comp 4037 overall or steel comp 4140 overall or steel comp 4130 overall | |
| Material Document and Classification | MIL-S-6049 mil spec 1ST material response overall or MIL-S-6050 mil spec 2ND material response overall or MIL-S-6098 mil spec 3RD material response overall or ams 6300 assn std 4TH material response overall or MIL-S-5626 mil spec 5TH material response overall or MIL-S-6758 mil spec 6TH material response overall | |
| Surface Treatment | Cadmium overall and chromate overall | |
| Surface Treatment Document and Classification | QQ-P-416, ty 2, class 3 fed spec all treatment responses overall | |
| Thread Series Designator | UNF |
Fits In:
- · Embraer Legacy 600-650
- · 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 Cessna 510 Citation Mustang
- · Textron Aviation Cessna 525 Citation Citationjet
- · Textron Aviation Cessna 560 Citation V-Ultra-Encore-Excel-XLS
- · Textron Aviation Cessna 680 Citation Sovereign
- · Textron Aviation Cessna 750 Citation X
- · Textron Aviation Hawker 800
- · Textron Aviation Hawker 800XP-850XP
- · Textron Aviation Hawker 900XP