Deltana S33R4 3" x 3" x 1/4" Radius Hinge, Steel (Pair)

No. The S33R4 is a residential, plain bearing steel hinge with a .085 inch leaf thickness, and Deltana lists the steel hinges as a value choice for indoor applications. For an exterior or commercial opening, step up to a bearing hinge such as the Orca Hardware 4 x 4 x 1/4 inch radius plain bearing commercial hinge or the Ives 3CB1 concealed bearing full mortise hinge.

The S33R4 is classified residential and uses a plain bearing. For a commercial opening cut with the same 1/4 inch radius corner, Orca Hardware's 3514 Series is a 3-1/2 inch by 3-1/2 inch 1/4 inch radius corner plain bearing commercial hinge rated medium duty, and the 4014 Series is the same construction at 4 inch by 4 inch. Both keep the radius corner prep while moving up to a commercial medium duty rating.

The S33R4 is a steel hinge described for indoor applications and classified residential. For an exterior residential leaf, Delaney's RH45xx is a 4 inch by 4 inch bulk residential hinge pair specified for exterior use with a 5/8 inch radius corner. Note it is a larger leaf and a different corner radius than the 3 inch by 3 inch, 1/4 inch radius S33R4, so the jamb and door prep will not be the same.

The S33R4 is sold by the pair, so one order covers two of the three hinges a standard door usually takes. Wood screws are included, #9 x 3/4 inch. Most 3 x 3 doors are small interior or closet slabs hung on two or three hinges, so plan the count against your opening.

No. The S33R4 is supplied without NRP, so the pin can be driven out with the door closed. That is fine for interior residential doors, which is what this hinge is built for. If you need NRP on an out-swinging secure door, look at the Hager BB1168 non-removable pin full mortise ball bearing hinge.

Plain bearing means the knuckles ride directly on each other with no bearing races, which is quieter to make and cheaper but wears faster under weight and frequency. The S33R4 is plain bearing and rated residential. Where a door is heavy or sees constant traffic, a ball bearing hinge such as the Emtek 94013 heavy duty ball bearing pair or the Orca Hardware 4-1/2 x 4-1/2 square corner ball bearing commercial hinge carries the load better.

Full mortise butt hinges of this type are non-handed. The S33R4 leaves are symmetrical and mount in the door edge and jamb rebate the same way regardless of swing direction, so a single pair covers left or right hand openings.

The S33R4 uses a plain bearing and is intended for residential interior openings. Where the door is heavy or the traffic is high enough to want a bearing race, the Emtek 94013 is a heavy duty ball bearing hinge pair at 3-1/2 inch by 3-1/2 inch with square corners in plated steel, and Orca's 3535 Series is a 4-1/2 inch by 4-1/2 inch square corner ball bearing commercial hinge rated medium duty. Delaney's CH401X is a 4 inch by 4 inch commercial ball bearing hinge with square corners. All three are square corner, so the prep differs from the 1/4 inch radius the S33R4 is cut for.

Several steel full mortise hinges are built for jobs the S33R4 is not. The Ives 3CB1 is a 3-knuckle concealed bearing full mortise hinge rated medium duty, and the 3CB1HW is a heavy weight version of the same concealed bearing design - concealed bearing, not the plain bearing the S33R4 uses. The Hager BB1168 is a full mortise ball bearing heavy duty hinge with a non-removable pin, where the S33R4 does not have NRP. Electrified and monitored hinges such as the Command Access ETH-CB70 energy transfer hinge and the ETM-CB70 with door position sensing carry wiring through the leaf and require raceway prep. The Stanley 2060R is a spring hinge, which self-closes rather than swinging free.

All three are steel plain bearing residential-type mortise hinges. The S33R4 is 3 inch by 3 inch with 1/4 inch radius corners and ships as a pair. The Ives 1010RP is a steel plain bearing residential hinge with square corners supplied as a set of three, and the Schlage Residential S3P1010 is a 3-1/2 inch by 3-1/2 inch square corner plain bearing mortise hinge in a pack of three. So the differences that matter on a door are leaf size, square versus 1/4 inch radius corners, and whether you get two or three hinges per box.

Two: zinc dichromate and prime coat white. The prime coat is the one to order if the hinge is getting painted to match trim; zinc dichromate is the plain utility finish for closet, pantry, and back-of-house doors where appearance doesn't matter.