MIL-STD-810H Method 516.8 drop test explained: 26 drops, 5 faces + 8 corners + 12 edges + 1 worst-case, 1.22m height. What it tests, what it doesn't, and how to verify.
MIL-STD-810H Method 516.8 drop test consists of 26 drops total: 5 faces + 8 corners + 12 edges + 1 worst-case orientation. Drop height is 1.22m (48 inches, standard pallet height). Test surface is 2-inch-thick concrete over solid base. KeXinMaterials' Series 8 cases pass all 26 drops with zero functional failure.
MIL-STD-810H Method 516.8 (Shock) is the most-requested test in protective case procurement. It simulates the drops and impacts a case experiences during air freight, truck transport, and field handling. But "MIL-STD-810" alone is not a guarantee of quality — the test method, drop height, and number of drops must be specified.
This guide explains Method 516.8 in detail: the 26-drop sequence, what passes and what doesn't, what the test actually proves, and how to verify a supplier's claims. Based on KeXinMaterials' ongoing test program at Element Materials Testing (formerly NTS/PCTEST) and our experience supplying MIL-SPEC cases to 25+ countries.
Key fact: A case that passes MIL-STD-810H Method 516.8 has been dropped 26 times from 1.22m onto 2-inch-thick concrete — and still latches, hinges, and seals correctly. It does NOT guarantee IP67 after the drops unless the supplier specifically tested that.
MIL-STD-810H Method 516.8, Procedure IV (Transit Drop) is the most common test for transit-survivable equipment. It consists of 26 drops total, structured as follows:
One drop on each of the 5 main faces of the case:
Note: The case has 6 faces, but the test typically uses 5 (skipping the face that would naturally rest on the ground). The full 6-face test is Method 516.8 Procedure VI (Bench Handling).
One drop on each of the 8 corners of the case (4 bottom corners + 4 top corners). Corner drops are particularly demanding because they concentrate impact force on a single point.
One drop on each of the 12 edges (the lines where 2 faces meet, excluding the bottom edges that are usually skipped in transit testing).
One additional drop on the orientation judged most likely to cause failure, based on engineering judgment. This is supplier-specific and gives flexibility to test the case's weakest orientation.
After each of the 26 drops, the case is inspected for the following pass criteria:
Our MIL-SPEC test program includes the standard 26 drops PLUS:
The test report is the certificate. A "MIL-SPEC" claim without a report is meaningless. Here's how to verify.
Avoid suppliers who:
Always ask for the test report before placing an OEM order. A serious supplier will provide it within 24 hours. KeXinMaterials maintains 3 ongoing MIL-STD-810 test programs and can issue a fresh report for your specific batch. Request MIL-SPEC test report →
CNC foam provides ±1mm precision, the drone doesn't shift in transit, and you get custom cutouts for accessories. Pick-and-pluck is ±5mm and the loose cubes can fall into your drone.
50 kg/m³ density provides 25-30G shock absorption, the minimum for commercial and industrial drones. EPE at 20 kg/m³ only provides 5-10G.
At KeXinMaterials, 3D design 2-3 days, sample 3-5 days, mass production 5-10 days. Total 7-15 days.
Yes — pick-and-pluck foam is user-replaceable. For CNC foam, we offer a re-cut service at $30-$60 per insert if you change drones.
For marine or humid environments, yes. Closed-cell foam doesn't absorb water and resists mold.
KeXinMaterials source factory, in-house CNC foam cutting, custom-fit foam for 200+ drone models.