MIBANT (nail bend test)
Also called: Morgan Impact Bend Angle Nail Tester, MIBANT angle, nail bend test
MIBANT (Morgan Impact Bend Angle Nail Tester) is an impact-bend test for nail stiffness, run under ASTM F680. A weight strikes a clamped nail and the resulting bend angle is recorded; a lower angle means a stiffer, better nail.
In depth: ASTM F680: test methods for nails (including the MIBANT test)
MIBANT measures how far a nail bends under a standard impact. Stiff nails keep pallet joints tight when boards are hit or the pallet racks, so the MIBANT angle is a direct quality check on pallet nail steel and wire size.
Quality bands (trade guidance)
| MIBANT angle | Rating |
|---|---|
| 8 to 24° | Excellent |
| 25 to 35° | Good |
| 37 to 46° | Acceptable |
| Above that | Poor for deck nails |
Not more than 8% of nails tested may show shank failure. Example acceptable reusable-pallet nails in the Uniform Standard (2012) Annex G have MIBANT values of 41 to 52°. Real PDS sheets show 21, 28 and 36° for quality deck nails and 108° for a soft clinching mat nail.
Converting to bending yield
Uniform Standard (2012) Annex F converts MIBANT to bending yield strength:
- My = 1219.1 × MIBANT^−0.9653 (lbf·in)
- Fyb = My ÷ (Ds³ ÷ 6), where Ds is wire diameter
The minimum Fyb is 100 ksi (690 MPa).
On a spec sheet
PDS lists "MIBANT Angle" (or bending yield strength) in the fastener table. Buyers who care about durability can ask for MIBANT certificates from the nail supplier. See ASTM F680.
Related
- StandardsASTM F680: test methods for nails (including the MIBANT test)ASTM F680 is the ASTM standard for testing nails: dimensions, tension, bend, impact bend, hardness and zinc coatings. Its impact bend test is the MIBANT test pallet makers use to check nail stiffness. F680 gives methods only; the product spec sets the pass values.
- GlossaryNail (pallet fastener)A nail is the standard fastener for wood pallets, driven through deckboards into stringers or blocks. Pallet nails are specified by shank type (helical, annular or plain), length, wire diameter, head diameter and bending strength.
- GlossaryWire diameter (pallet nails)Wire diameter is the diameter of the steel wire a nail or staple is made from, measured on the shank before threads are rolled. Pallet nails are commonly 0.099 to 0.120 in (2.5 to 3.0 mm), or 12.5 to 11 gauge.
- GuidesPallet nails and fasteners: types, sizes, MIBANT and nail countsMost wood pallets use threaded nails: helical (screw shank) for dense hardwoods, annular (ring shank) for softwoods. A typical deck nail is 2-1/4 in long with 0.112–0.120 in (11.5–11 gauge) wire. The Uniform Standard requires at least 2 nails per joint on boards up to 5-1/4 in wide and 3 on wider ones.
- StandardsUniform Standard for Wood Pallets (Woodpack Global, formerly NWPCA)The Uniform Standard for Wood Pallets is the North American industry standard for specifying, building and repairing wood pallets: terms, lumber quality, tolerances, fasteners, notches, repair and performance. Woodpack Global (formerly NWPCA) publishes it; it is voluntary and was revised in 2025.
More in Fasteners
- GlossaryAnnularly threaded nail (pallet)An annularly threaded nail, or ring shank nail, has a series of rings rolled into its shank that lock into the wood fibers. It is generally recommended for low-density hardwoods and most softwoods.
- GlossaryClinched nail (pallet)A clinched nail is driven all the way through the parts it joins and has its protruding tip bent over flat. Block-pallet deck mats (deckboards plus stringerboards) are commonly assembled with clinched nails.
- GlossaryHelically threaded nail (pallet)A helically threaded nail has spiral flutes rolled into its shank so it rotates as it is driven, which locks it into the wood. It is the most common pallet nail, recommended for medium- and high-density hardwoods.
- GlossaryNail head diameter (pallet nails)Nail head diameter is the width of a nail's head. It sets how well the nail resists pulling through the deckboard; the Uniform Standard requires the head to be at least 2.25 times the wire diameter for reusable pallets.
- GlossaryNailing pattern (pallet)A nailing pattern is the number and position of fasteners at each joint of a pallet. The Uniform Standard sets minimums by deckboard width: 2 fasteners per joint for boards up to 5-1/4 in wide and 3 for 5-1/4 to 7 in.
- GlossaryPlain shank nail (pallet)A plain shank nail has a smooth shank with no threads. It has the lowest withdrawal resistance of pallet nails, so on pallets it is mainly used where it is clinched, such as block-pallet deck mats.
Last reviewed 2026-09-24. 210 words.