Aeronautical Standard - Machine Bolt - AN4-31
Standard Part
Description: Machine Bolt
Part Number: AN4-31
Alternate Part Numbers: No known alternate
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 | 0.438 inches minimum and 0.515 inches maximum | |
| Fastener Length | 3.142 inches minimum and 3.187 inches maximum | |
| 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 | 2.672 inches minimum and 2.704 inches maximum | |
| 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 | 3.000 inches nominal first hole | |
| Material | Steel comp 4140 overall or steel comp 8740 overall or steel comp 8630 overall or steel comp 8735 overall or steel comp 4130 overall or steel comp 4037 overall | |
| Material Document and Classification | MIL-S-5626 mil spec 1ST material response overall or MIL-S-6049 mil spec 2ND material response overall or MIL-S-6050 mil spec 3RD material response overall or MIL-S-6098 mil spec 4TH material response overall or MIL-S-6758 mil spec 5TH material response overall or ams 6300 assn std 6TH material response overall | |
| Surface Treatment | Cadmium overall or chromate overall | |
| Surface Treatment Document and Classification | QQ-P-416 ty 2 cl 3 fed spec all treatment responses overall | |
| Thread Series Designator | UNF |
Fits In:
- · Textron Aviation Cessna 750 Citation X
| Additional info | |
|---|---|
| Colors | Gold |
| Dimensions | |
|---|---|
| Dimensions (W x H x D) | 3.32" x 0.44" x 0.44" inches |
| Length | 3.32" inches |
| Weight | 0.05 lb |
| Specifications | |
|---|---|
| 8130-3 Eligible | No |
| ATA Chapter | 51 ATA Standard Practices and Structures |
| Available Conditions | NE / NS |
| Cage Code | 88044 |
| Country of origin | United States of America |
| ECCN / USML | EAR99 |
| FAA Approval Code | STD |
| Grip | 0.438" - 0.515" inches |
| Hazmat Code | Not Applicable |
| Hazmat(Y/N) | N |
| Material | Steel overall |
| NSN | 5306-00-622-1823 |
| Schedule B | 7318.15.2000 |
| Thread | 3A |
| Total Shelf Life (days) | Not Applicable |
| Type | Bolt |
| Units of Measure (UoM) | Each |
| Brand | Aeronautical Standard Group Inc |
| Color | Gold |
| Condition status | Depreciated |