Machine Bolt - AN4-15A
Aeronautical Standard Bolt
Description: Machine Bolt
Part number: AN4-15A
OVERVIEW
Hex head aircraft bolts are made of high-strength type 4037 or 8740 alloy steel (type 8740 is most commonly used). The bolts are centerless ground and threaded after heat treatment. Minimum tensile strength 125,000 PSI. Cadmium plated per specification QQ-P-416A, Type II, Class 3. Available with shank drilled for cotter pin or undrilled for stop nut application, and with or without drilled head for safety wire. Specify bolts to have undrilled shank by adding letter "A" after the dash number. For bolts with drilled head add letter "H" after the AN number. See illustrated examples. "C" represents Type 431 Stainless Steel (contains iron which is magnetic). The length of AN aircraft bolts is measured from under the head to the end of the shank. The "grip" is the unthreaded portion of the shank. See table for conversion of length and/or grip to proper AN callout.
Product Dimension: Length: 1-21/32", Grip: 1-3/16", Thread: 1/4-28
Cadmium plated steel, Undrilled shank
AN4-15A Datasheet Features and Specification
| Parameter | Characteristics | ||
| Thread Class | : | 3A | |
| Thread Direction | : | Right-hand | |
| Thread Length | : | 0.468 inches | |
| Fastener Length | : | 1.656 inches | |
| Head Style | : | Hexagon | |
| Head Height | : | Between 0.140 inches and 0.172 inches | |
| Width Between Flats | : | Between 0.428 inches and 0.440 inches | |
| Material Specification | : | Mil-b-6812 military specification all material responses | |
| Thread Diameter | : | 0.250 inches | |
| Grip Length | : | 1.188 inches | |
| Surface Treatment Specification | : | Class 3 federal specification all treatment responses type 2 qq-p-416 | |
| Thread Series Designator | : | UNF (fine thread) | |
| Features Provided | : | Finished head | |
| Thread Quantity per Inch | : | 28 | |
| Minimum Tensile Strength | : | 125000 pounds per square inch | |
| Hardness Rating | : | 26.0 rockwell c and 32.0 rockwell c | |
| Surface Treatment: | : | Cadmium and chromate | |
| Material | : | Steel comp 4037 or steel comp 4130 or steel comp 8630 or steel comp 8735 or steel comp 8740 or steel comp 4140 |
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