JSP EVO 6151 Long-Brim Cap-Style Hard Hat — Type I Class C (Vented), HDPE, 6-Point Wheel Ratchet

About the JSP EVO 6151 Long-Brim Cap-Style Hard Hat

The Evolution Deluxe 6151 is JSP's cap-style hard hat with an extended front brim — a longer peak than a standard cap for more shade and forward coverage, without the bulk of a full 360-degree brim. Its HDPE shell carries five raised channels for strength and an extended rear area, and it rides on a 6-point polyester harness with JSP's wheel-ratchet and 3D depth adjustment for a precise, comfortable fit. It is reversible-doffing rated, takes universal slot accessories, and uses JSP's Chamlon Egyptian-cotton brow pad. For where a cap-style fits best, see our best cap-style hard hat guide.

The certification is the part to read carefully. The EVO 6151 is ANSI/ISEA Z89.1 Type I — top-impact protection, not lateral. The class depends on the variant: this vented version (blue, SKU AJK170-000-504) is Class C, with no electrical protection, while the non-vented 6151 is Class E, tested to 20,000 V. That distinction decides whether the hat is safe near energized equipment, so match the vent status to your hazard — and see our hard hat classes explained guide if you are unsure.

Who It's For — and Who Needs a Different Hat

The vented Class C 6151 is a comfortable, cooler cap for general construction, warehousing, and outdoor work where there is no electrical hazard and the extended brim's shade is welcome. If your work involves energized equipment, switch to the non-vented Class E 6151 or another electrical-rated hard hat. For a comparison of cap options, our cap-style guide lines them up alongside the Ergodyne 8970, the Pyramex Ridgeline, and the MSA V-Gard cap.

Choose a different hat when the work changes. For side-impact hazards, step up to a Type 2 safety helmet such as the Ergodyne 8976. For high radiant heat or molten metal, HDPE is the wrong material — choose fiberglass and read HDPE vs fiberglass. And for full 360-degree sun and rain coverage, JSP's own full-brim EVO 6161 is the sibling shell. Our hard hat selection guide walks the whole decision.

Pros & Cons

Specifications

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Frequently Asked Questions

Is this JSP EVO 6151 rated for electrical work?

Not this version. The SKU shown here is the vented 6151, which is ANSI/ISEA Z89.1 Type I, Class C — the vents mean it provides no electrical protection. JSP makes a non-vented 6151 that is Class E (tested to 20,000 V) for electrical and utility work. Before using a 6151 near energized equipment, confirm you have the non-vented Class E shell; a vented shell is disqualified for electrical work.

What ANSI Type is the 6151, and does it protect against side impact?

It is certified ANSI/ISEA Z89.1 Type I, which protects against impact to the top of the head only. It is not a Type 2 helmet and is not rated for lateral (side) impact. If your hazard assessment includes side impacts, choose a Type 2 safety helmet rather than this cap-style hard hat.

Is this version vented or non-vented?

This SKU is the vented version, which is what makes it Class C — the vents add airflow for cooler wear but remove any electrical rating. JSP also makes a non-vented 6151 that is Class E. Match the vent choice to your work: non-vented Class E where electrical hazards exist, vented Class C only where they do not.

What is the shell made of?

The EVO 6151 shell is high-density polyethylene (HDPE) with five raised channels for strength, plus an extended rear area for added coverage. HDPE is lightweight and durable, but as a thermoplastic it is not intended for high radiant heat or molten-metal environments — those call for a fiberglass shell.

What suspension does the 6151 use?

A 6-point polyester textile webbing harness with JSP's wheel-ratchet adjustment, plus a 3D adjustment that sets harness depth for a precise fit. Six-point suspensions spread impact energy over more contact points than a four-point, and the wheel ratchet dials in a secure, even fit one-handed.

What does "long brim" mean, and how is it different from a full-brim?

The 6151 is a cap-style hard hat with an extended front brim (peak) — longer than a standard cap peak for more shade and forward coverage, but not a 360-degree full brim. If you want a brim all the way around to shed sun and rain off the neck and ears, that is the full-brim JSP 6161 instead.

Can I wear the 6151 backward?

Yes. The 6151 is reversible-doffing rated, so you can wear the brim forward or reversed and keep its certification — useful when the front peak gets in the way of a task or another piece of equipment. Look for the reverse-donning arrow marking inside the shell.

What head sizes does the 6151 fit?

The wheel-ratchet suspension adjusts across a wide adult range, fitting most head sizes without tools. Turn the wheel so the hat sits level and snug without pressure points, and re-check the fit if you wear a liner or beanie underneath.

Can I add earmuffs or a face shield to the 6151?

Yes. It has universal accessory slots that accept common attachments like earmuffs and face shields. If you are using the non-vented Class E version for electrical work, use only accessories rated to preserve the electrical protection, since metallic parts can compromise the dielectric rating.

How long does a hard hat last, and when should I replace it?

Replace any hard hat immediately after an impact, even if it looks intact, because the shell and suspension may be compromised. Otherwise follow the manufacturer's service-life guidance — commonly a few years for the shell from date of manufacture and about a year for the suspension — and inspect regularly for cracks, chalking, or UV damage.

How is the 6151 different from the JSP 6161?

Both are JSP Evolution Deluxe shells with the same wheel-ratchet suspension, but the 6151 is a cap-style with an extended front brim, while the 6161 is a full-brim with a 360-degree brim. Choose the 6151 for a lighter, lower-profile cap and the 6161 for all-around sun and rain coverage.

What is the SKU, and how do I order the right variant?

This is JSP part AJK170-000-504, the blue vented (Class C) 6151. Because the 6151 comes in several colors, plus vented (Class C) and non-vented (Class E) versions, match the color, vent status, and class to your job when ordering — choosing by model number alone can land you with the wrong electrical rating.