ANSI Puncture Level Chart Explained: Probe and Needle Ratings Compared

A supervisor pulls a glove off at the end of a shift and finds a small puncture near the base of the thumb. The glove carried an ANSI puncture level 4 marking. The wire still went through. Nothing printed on the label was wrong, because the label answered a question that had nothing to do with the injury.

ANSI/ISEA 105-2016 publishes two separate puncture scales for protective gloves. One uses a blunt steel probe and rates materials from level 1 to level 5. The other uses a 25 gauge hypodermic needle and also rates level 1 to level 5, but across a far lower force range. A level 4 on the probe scale says nothing about needle resistance, and a glove that stops a splintered pallet edge can be almost transparent to a fine hollow needle. The chart is a set of force thresholds, not a ranking of overall protection.

What follows is a plain read of both scales, the force values behind each level, the gap between the American and European puncture tests, and the checks that keep a purchase order from turning into a false sense of safety.

How the ANSI Probe Puncture Test Works

The probe method follows ASTM F1342. A specimen is clamped in a frame, a standardized blunt probe is driven into the material at a controlled rate, and the instrument records the peak force in newtons at the moment the probe passes through. The output is a force value, not a pass or fail judgement. ANSI/ISEA 105-2016 then groups those force values into five bands.

Because the test measures force, the bands are not evenly spaced in protective value. Level 1 opens at 10 N and level 5 begins at 150 N, so the top band starts fifteen times higher than the bottom band. Materials below 10 N are not rated at all, which is common for thin coated knit liners that were never designed to stop a point.

Older warehouse stock may still show a level 0. That marking comes from the previous edition of the standard, which included a band below 10 N. The 2016 edition dropped it and starts at level 1, so a level 0 label on a shelf is a sign of aged inventory rather than a lower grade of the current scale.

One more detail matters during selection. The rating is assigned to the finished glove material, not to the yarn that went into it. A coating, a seam or a reinforced patch can shift the result in either direction, so the number in a catalogue should always be traceable to a test report on the article being sold.

Needle Puncture Is a Separate Scale

Fine hollow needles do not behave like blunt probes. The tip concentrates load on a very small area, so the force required to push through a material can be a small fraction of the force measured on the probe. ANSI/ISEA 105-2016 therefore added a second scale built on ASTM F2878, which uses a 25 gauge needle with an outer diameter of about 0.5 mm.

The gap between the two tables is easy to underestimate. Needle level 3 covers 10 N to 19 N, which is exactly the same force window as probe level 1. When a supplier says the material is level 4, the first question back should be level 4 on which test. In healthcare, laboratory, sharps handling and waste sorting work the needle scale is the one that matters most, and quoting a probe number in its place is a serious specification error rather than a rounding difference.

Needle results are also tied to the needle itself. A different gauge, a different sharpness or a lubricated coating changes the force required, so needle levels should not be extrapolated to other sharp objects. The test defines one needle and one method, and the rating only travels that far.

Matching a Puncture Level to the Real Hazard

The right level depends on the shape of the object, the force it carries and how long the hand is exposed to it. Practical starting points look like this.

• Waste sorting and recycling: mixed sharps, broken glass and protruding staples. Start from the needle scale at level 3 or higher and add cut resistance for the edges.
• Glass handling and glazing: fragments with irregular edges. The probe scale in the level 3 to level 5 range fits, together with a fit that keeps the palm covered when the hand closes.
• Construction and formwork: rebar ends, tie wire, nails and splinters. Probe level 3 or above covers most blunt point contact, while stiff wire tips are better treated as sharps.
• Healthcare and laboratory: syringes, suture needles and scalpels. Needle scale level 4 or 5 is a common requirement, and cut level is a separate property that does not replace it.
• Food processing and metal detection: bone shards and metal fragments. The probe scale applies, but grip and washability often drive the final choice more than the number does.

Two other properties are frequently confused with puncture. Cut resistance uses a different test and a different scale, with ANSI/ISEA 105 cut levels running from A1 to A9 measured in grams of load. Abrasion resistance is a third test again. A glove can score well on cut and still fail quickly against a needle, because a sliding blade and a stationary point place very different stresses on the material.

ANSI and EN 388 Puncture Levels Do Not Line Up

European glove markings use EN 388, which reports puncture resistance over four levels with its own probe geometry and clamping arrangement. The force ranges overlap with the American bands, but the boundaries sit in different places, so identical force values land on different levels.

The practical lesson is to compare newtons, not levels. A glove tested at 70 N is ANSI probe level 3 and EN 388 level 2 at the same time, so a specification written as level 3 for both regions will not describe the same material. Ask for the test report and read three things in it: the force value, the test method reference and the edition of the standard behind the number.

Six Checks Before You Approve an Order

1. Ask which test produced the number. A quotation that says level 4 without naming the probe test or the needle test is incomplete.
2. Request the force value in newtons, not only the band. Two gloves at level 3 can differ by a factor of two in actual resistance.
3. Confirm the test was run on the finished glove, not the liner. Coatings, seams and assembly change puncture performance.
4. Weigh fit, grip and thickness against the rating. A heavy glove that gets pulled off during a task protects less than a lighter one that stays on the hand.
5. Ask how laundering, disinfection or repeated flexing affects the material. Puncture performance can drop once a coating starts to crack.
6. Keep the rating inside the wider risk assessment. Hand protection is one line of it, and the same job may also involve head, respiratory, fall or water hazards that need their own equipment.

The last check is where a mixed safety programme usually pays off. Teams that buy hand protection for a rescue or industrial site often need head, respiratory, fall arrest and water rescue items from the same source, with paperwork that survives an audit. Manufacturers working across those categories can consolidate both the order and the documentation.

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Read the chart as two charts. Probe levels from 1 to 5 describe resistance to blunt points. Needle levels from 1 to 5 describe resistance to a fine hollow needle, and the two force ranges barely touch. Match the scale to the hazard in front of you, ask for the newtons behind the level, and confirm the rating belongs to the finished glove in the box. That is enough to stop a level 4 label from promising more than the material can deliver.