By Kent · Lock Depot Staff Writer

Same footprint, two different safes

Long guns get stored in a closet because the safe that would hold them right never gets bought. The AMSEC NF6030 and SF6030 both measure the same 59"H x 30"W x 26"D outside, so either one clears the same door and the same corner of the same closet. Inside the steel, they are not the same safe, and the difference is exactly the one most buyers never ask about until it's too late to change the order.

The NF6030: burglary rating built in

The NF6030 carries a UL RSC Level I burglary rating on top of its fire protection. UL tested it against five minutes of net working time with common hand tools, a real independent certification, though a lower class than a TL-15 rating if a specification calls for that instead. That burglary rating comes from an 11-gauge outer wall and a 1/4" door, and it is why the NF6030's interior runs smaller: 24,848 cubic inches, holding roughly 14 long guns plus 2 depending on barrel length.

The SF6030: no burglary claim, more room inside

Its counterpart, the SF6030, drops the burglary certification and puts the steel savings into interior space instead: 28,704 cubic inches, about 15 long guns plus 2. The door thins to 3/16" and the gauge drops to 12-gauge on the door and walls. It is still a serious weight to move, 748 pounds, but it is not built to resist a forced-entry attack the way the NF6030 is. Buy it because you want the room and you are solving for fire, not for a break-in.

The fire numbers, and the one that actually matters

The NF6030 is rated ETL 90-minute fire at 1200°F. The SF6030 is rated ETL 60-minute fire at the same temperature. Both hold the interior below 350°F for the length of their test, and that number is the one worth reading twice: paper starts to char near 400°F, so the interior hold is what actually protects what's inside, not the headline minute count by itself. ETL and Intertek verification is independent and real, but it is a different mark than a UL fire certification. If a spec calls for "UL fire rated" specifically, confirm which mark you're being sold before you order either one.

Picking between the two

	NF6030	SF6030
Burglary rating	UL RSC Level I	None
Fire rating	ETL 90-minute	ETL 60-minute
Steel	11-gauge wall, 1/4" door	12-gauge wall and door, 3/16" door thickness
Interior capacity	24,848 cu in	28,704 cu in
Gun capacity	~14 long guns + 2	~15 long guns + 2

If a burglar getting the door open at all is a real concern, the NF6030's UL RSC rating is worth the smaller interior. If the safe sits in a locked house, in a room a burglar would have to get through first, and the actual worry is a house fire while you're at work, the SF6030's extra capacity and 60-minute fire hold are the better trade. Neither number replaces the other; they're solving different threats.

Will it actually fit through the door

The exterior footprint is identical, but the door opening is not: the NF6030 opens to 52"H x 22-3/4"W, and the SF6030 opens slightly narrower at 51-1/2"H x 22-1/2"W. Neither difference changes what fits through a standard interior doorway, but the numbers matter more once the safe is inside the room and you're loading a scoped rifle or a case at an angle. Measure the path from the delivery truck to the final spot, not just the closet opening; a hallway turn or a stairwell landing kills more installs than the actual doorway does.

Anchoring is not optional on either one

Both safes ship with 4 anchor holes in the base, and neither is doing its job sitting unbolted on a slab or a wood floor. An unanchored safe of either weight class can be tipped or walked out on a dolly by two people with time and no audience, which defeats the burglary rating on the NF6030 as completely as skipping it defeats the SF6030's fire protection. Anchor into a concrete slab where possible; on a wood floor, anchor into the joist, not just the subfloor, and confirm the joist can carry the load before you commit to a spot. Both carry a lifetime warranty against theft and fire, but that warranty covers the safe, not a floor that gives out under it.

Before you order either one

Plan for the delivery itself, too: both are freight shipments at several hundred pounds, and both need the anchoring plan settled before the truck shows up, not after. The electronic keypad locks on both are worth confirming at order time, since AMSEC has changed lock suppliers on parts of this line before; ask us to confirm exactly which lock ships with your order the same way you'd confirm it on an ESL5 or ESL10 retrofit.

Common questions

Is the NF6030 or SF6030 better for storing guns long-term?

Both protect against fire; the NF6030 adds real burglary resistance the SF6030 doesn't claim. If forced entry is part of what you're protecting against, the NF6030 is the safer buy even with less interior room.

How many rifles actually fit in a 6030-size safe?

The NF6030 is rated around 14 long guns plus 2 shorter items; the SF6030 fits roughly 15 plus 2. Actual capacity depends on how many have scopes or bipods, since accessories eat interior width fast.

What does UL RSC Level I actually certify?

Underwriters Laboratories tested the safe against five minutes of net working time using common hand tools and it held. It's a real UL burglary classification, but a lower tier than a TL-15 rating; if a job specification calls for TL-15, an RSC-rated safe does not meet it.

Is a 90-minute fire rating twice as safe as a 60-minute rating?

Not in a simple multiple. Both are tested to keep the interior below 350°F, which is the number that protects paper and most stored contents; the minute rating tells you how long the safe held that line in the test fire, not a straight safety multiplier.

Do I need a UL fire rating instead of an ETL fire rating?

Only if your specification names UL by mark. ETL and Intertek testing is an independent, legitimate verification, but it is a different certifying body than UL. Read the spec language closely before ordering either safe against a written requirement.