The 1590LLBFBK is one of the smallest boxes in the 1590 series: a 51 x 51 x 25 mm diecast aluminum enclosure with a flanged bottom plate and a black textured finish. It suits OEM engineers and technicians who need a compact, rugged housing for a small circuit board, sensor interface or signal module that must be bolted down to a panel or surface.
Box and lid are made from diecast aluminum alloy, a material that is tough yet easy to machine. The black version is coated with polyester powder paint for a lasting finish, even after machining, and black screws are included to match. The bottom flange is welded to the box, and the lid and box meet in a lap joint that protects against dust and splashing water; the standard version is designed to meet IP54.
Per the drawing, the box measures 50.50 mm [1.988 in] square and 25.00 mm [.984 in] high, with an overall length of 78.99 mm [3.110 in] across the flange. Inside space is 45.63 x 40.50 x 21.00 mm, and the listed maximum PC board size is 44.83 x 44.83 mm. A low side wall draft angle of 2° or less makes board mounting easier.
The assembly ships with box, lid and 4 cover screws that thread into factory-tapped 6-32 UNC holes; recommended torque is 50-55 cN.m. For a sealed build, the water-tight equivalent is 1590WLLBFBK, and 1590LBGASKET is listed as the replacement gasket kit for this size. It is RoHS and REACH compliant.
| CAD Models | Solid models available in STEP or IGES |
| Factory Modification | Milling, drilling, printing etc. available from the factory on request |
| Cover Screw Holes | 4X 6-32 UNC, factory-tapped |
| Liquid Resistant Cover Screws | 1590WMS100 stainless steel (Pkg 100) or 1590WMS100BK black stainless steel (Pkg 100), 6-32 x 1/2" with O-ring |
| Recommended Cover Screw Torque | 50-55 cN.m [71-78 ozf.in] |
| Recommended Torque With Gasket | 25-30 cN.m [36-43 ozf.in] |
| Standard Replacement Cover Screws | 1590MS100 plated (Pkg 100) or 1590MS100BK black (Pkg 100), 6-32 x 1/2" |
| Tamper-Resistant Screw Upgrade (Torx With Pin, 50-Pack) | 1590MS50T (natural), 1590MS50TBK (black); screwdriver bit SCDRIVET10-2 |
| Type | Die-cast box, flanged |
| Color | Black |
| Series | 1590 Series Diecast Aluminum Enclosures |
| Version | Standard |
| Part Number | 1590LLBFBK |
| Mounting Style | w/ Flanged Bottom Plate |
| Long Description | enclosure - diecast |
| Short Description | 50 X 50 X 25MM FLANGED BLACK |
| Lid Height | 0.16" (4 mm) |
| Inside Width | 40.50 mm [1.594 in] |
| Inside Height | 21.00 mm [.827 in] |
| Inside Length | 45.63 mm [1.796 in] |
| Size (L X W X H) | 1.99 in x 1.99 in x 0.98 in (51 mm x 51 mm x 25 mm) |
| Box Width (Drawing) | 50.50 mm [1.988 in] |
| Box Length (Drawing) | 50.50 mm [1.988 in] |
| Nominal Size (Width) | 2.01 in (51 mm) |
| Nominal Size (Height) | 0.98 in (25 mm) |
| Nominal Size (Length) | 2.01 in (51 mm) |
| Side Wall Draft Angle | 2° or less |
| Overall Height (Drawing) | 25.00 mm [.984 in] |
| Max. P.C. Board Width (Mm) | 44.83 |
| Max. P.C. Board Length (Mm) | 44.83 |
| Overall Length Incl. Flange (Drawing) | 78.99 mm [3.110 in] |
| UPC | 623980808857 |
| UNSPSC | 39121301 |
| Packaging Type | shrink wrap |
| Shipping Weight | 0.19 lbs (0.09 kg) |
| Finish | Black textured polyester powder paint |
| Material | Aluminum (Die-Cast Alloy); box and lid made from diecast aluminum alloy |
| Screw Finish | Black screws included |
| Bottom Flange | Welded |
| Lid/Box Joint | Lap joint construction |
| Included Items | Box, lid and 4 cover screws |
| IP Rating | IP54 |
| Water-Tight Equivalent | 1590WLLBFBK (IP65, silicone gasket supplied loose) |
| Optional Replacement Gasket Kit | 1590LBGASKET |
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
Business account holders get access to exclusive pricing, volume discounts, and dedicated support. Create a free account to get started.
The listed size is 1.99 x 1.99 x 0.98 in (51 x 51 x 25 mm). The drawing shows a 50.50 mm square box, 25.00 mm high, 78.99 mm long including the bottom flange, with 45.63 x 40.50 x 21.00 mm of inside space.
It has a flanged bottom plate; the bottom flange is welded to the box so the enclosure can be fastened to a surface.
The standard version is designed to meet IP54. The water-tight version, 1590WLLBFBK, is designed to meet IP65 and includes a silicone gasket supplied loose.
The assembly includes box, lid and 4 cover screws. Black screws are included with the black version, and the lid holes are 6-32 UNC. Recommended torque is 50-55 cN.m [71-78 ozf.in].
The maximum PC board length and width are both listed as 44.83 mm.
Yes. The drawing states the enclosures can be factory modified (milling, drilling, printing etc.), and solid models are available in STEP or IGES.
Hammond Manufacturing · 001100
Hammond Manufacturing · 001102
Hammond Manufacturing · 001104
Hammond Manufacturing · 001106
Hammond Manufacturing · 001111
