Socket cap seal screws are widely used for their larger head height, resulting in a stronger part, which permits use of a higher torque value. They are engineered with a rubber O-ring under the head of the screw, that once tightened, squeezes outwardly to form a 360° leak-proof seal. This impenetrable, unbreakable seal prevents contaminants, i.e. water, oil, gas, fluids, precipitation, saltwater, dust, moisture and more, from entering and damaging equipment or leaking out and potentially harming our environment.
All parts are made from 18-8 Stainless Steel.
O-Ring Materials Available: Silicone (-SSS), Fluorosilicone (-FSS), Buna (-BSS), and Viton (-VSS).
| Apex Part Number | Thread | Length | Hex Socket Size | Head | Part Material | O-Ring |
| SE02C0018HSEALSSS | 2-56 | 3/16" | 1/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE02C0025HSEALSSS | 2-56 | 1/4" | 1/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE02C0031HSEALSSS | 2-56 | 5/16" | 1/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE02C0037HSEALSSS | 2-56 | 3/8" | 1/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE02C0043HSEALSSS | 2-56 | 7/16" | 1/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE02C0050HSEALSSS | 2-56 | 1/2" | 1/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE02C0056HSEALSSS | 2-56 | 9/16" | 1/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE02C0062HSEALSSS | 2-56 | 5/8" | 1/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE02C0075HSEALSSS | 2-56 | 3/4" | 1/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE02C0100HSEALSSS | 2-56 | 1" | 1/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE04C0025HSEALSSS | 4-40 | 1/4" | 3/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE04C0031HSEALSSS | 4-40 | 5/16" | 3/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE04C0037HSEALSSS | 4-40 | 3/8" | 3/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE04C0043HSEALSSS | 4-40 | 7/16" | 3/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE04C0050HSEALSSS | 4-40 | 1/2" | 3/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE04C0056HSEALSSS | 4-40 | 9/16" | 3/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE04C0062HSEALSSS | 4-40 | 5/8" | 3/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE04C0075HSEALSSS | 4-40 | 3/4" | 3/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE04C0087HSEALSSS | 4-40 | 7/8" | 3/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE04C0100HSEALSSS | 4-40 | 1" | 3/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE06C0025HSEALSSS | 6-32 | 1/4" | 7/64" | Socket Cap | 300 Stainless Steel | Silicone |
| SE06C0031HSEALSSS | 6-32 | 5/16" | 7/64" | Socket Cap | 300 Stainless Steel | Silicone |
| SE06C0037HSEALSSS | 6-32 | 3/8" | 7/64" | Socket Cap | 300 Stainless Steel | Silicone |
| SE06C0043HSEALSSS | 6-32 | 7/16" | 7/64" | Socket Cap | 300 Stainless Steel | Silicone |
| SE06C0050HSEALSSS | 6-32 | 1/2" | 7/64" | Socket Cap | 300 Stainless Steel | Silicone |
| SE06C0056HSEALSSS | 6-32 | 9/16" | 7/64" | Socket Cap | 300 Stainless Steel | Silicone |
| SE06C0062HSEALSSS | 6-32 | 5/8" | 7/64" | Socket Cap | 300 Stainless Steel | Silicone |
| SE06C0075HSEALSSS | 6-32 | 3/4" | 7/64" | Socket Cap | 300 Stainless Steel | Silicone |
| SE06C0087HSEALSSS | 6-32 | 7/8" | 7/64" | Socket Cap | 300 Stainless Steel | Silicone |
| SE06C0100HSEALSSS | 6-32 | 1" | 7/64" | Socket Cap | 300 Stainless Steel | Silicone |
| SE08C0025HSEALSSS | 8-32 | 1/4" | 9/64" | Socket Cap | 300 Stainless Steel | Silicone |
| SE08C0031HSEALSSS | 8-32 | 5/16" | 9/64" | Socket Cap | 300 Stainless Steel | Silicone |
| SE08C0037HSEALSSS | 8-32 | 3/8" | 9/64" | Socket Cap | 300 Stainless Steel | Silicone |
| SE08C0043HSEALSSS | 8-32 | 7/16" | 9/64" | Socket Cap | 300 Stainless Steel | Silicone |
| SE08C0050HSEALSSS | 8-32 | 1/2" | 9/64" | Socket Cap | 300 Stainless Steel | Silicone |
| SE08C0056HSEALSSS | 8-32 | 9/16" | 9/64" | Socket Cap | 300 Stainless Steel | Silicone |
| SE08C0062HSEALSSS | 8-32 | 5/8" | 9/64" | Socket Cap | 300 Stainless Steel | Silicone |
| SE08C0075HSEALSSS | 8-32 | 3/4" | 9/64" | Socket Cap | 300 Stainless Steel | Silicone |
| SE08C0087HSEALSSS | 8-32 | 7/8" | 9/64" | Socket Cap | 300 Stainless Steel | Silicone |
| SE08C0100HSEALSSS | 8-32 | 1" | 9/64" | Socket Cap | 300 Stainless Steel | Silicone |
| SE10F0025HSEALSSS | 10-32 | 1/2" | 5/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE10F0031HSEALSSS | 10-32 | 5/16" | 5/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE10F0037HSEALSSS | 10-32 | 3/8" | 5/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE10F0043HSEALSSS | 10-32 | 7/16" | 5/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE10F0050HSEALSSS | 10-32 | 1/2" | 5/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE10F0056HSEALSSS | 10-32 | 9/16" | 5/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE10F0062HSEALSSS | 10-32 | 5/8" | 5/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE10F0075HSEALSSS | 10-32 | 3/4" | 5/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE10F0087HSEALSSS | 10-32 | 7/8" | 5/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE10F0100HSEALSSS | 10-32 | 1" | 5/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE10C0025HSEALSSS | 10-24 | 1/4" | 5/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE10C0031HSEALSSS | 10-24 | 5/16" | 5/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE10C0037HSEALSSS | 10-24 | 3/8" | 5/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE10C0043HSEALSSS | 10-24 | 7/16" | 5/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE10C0050HSEALSSS | 10-24 | 1/2" | 5/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE10C0056HSEALSSS | 10-24 | 9/16" | 5/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE10C0062HSEALSSS | 10-24 | 5/8" | 5/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE10C0075HSEALSSS | 10-24 | 3/4" | 5/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE10C0087HSEALSSS | 10-24 | 7/8" | 5/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE10C0100HSEALSSS | 10-24 | 1" | 5/32" | Socket Cap | 300 Stainless Steel | Silicone |
| SE25C0037HSEALSSS | 1/4" | 3/8" | 3/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE25C0043HSEALSSS | 1/4" | 7/16" | 3/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE25C0050HSEALSSS | 1/4" | 1/2" | 3/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE25C0056HSEALSSS | 1/4" | 9/16" | 3/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE25C0062HSEALSSS | 1/4" | 5/8" | 3/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE25C0075HSEALSSS | 1/4" | 3/4" | 3/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE25C0087HSEALSSS | 1/4" | 7/8" | 3/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE25C0100HSEALSSS | 1/4" | 1" | 3/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE31C0037HSEALSSS | 5/16-18 | 3/8" | 1/4" | Socket Cap | 300 Stainless Steel | Silicone |
| SE31C0043HSEALSSS | 5/16-18 | 7/16" | 1/4" | Socket Cap | 300 Stainless Steel | Silicone |
| SE31C0050HSEALSSS | 5/16-18 | 1/2" | 1/4" | Socket Cap | 300 Stainless Steel | Silicone |
| SE31C0056HSEALSSS | 5/16-18 | 9/16" | 1/4" | Socket Cap | 300 Stainless Steel | Silicone |
| SE31C0062HSEALSSS | 5/16-18 | 5/8" | 1/4" | Socket Cap | 300 Stainless Steel | Silicone |
| SE31C0075HSEALSSS | 5/16-18 | 3/4" | 1/4" | Socket Cap | 300 Stainless Steel | Silicone |
| SE31C0087HSEALSSS | 5/16-18 | 7/8" | 1/4" | Socket Cap | 300 Stainless Steel | Silicone |
| SE31C0100HSEALSSS | 5/16-18 | 1 | 1/4" | Socket Cap | 300 Stainless Steel | Silicone |
| SE31F0037HSEALSSS | 5/16-24 | 3/8" | 1/4" | Socket Cap | 300 Stainless Steel | Silicone |
| SE31F0043HSEALSSS | 5/16-24 | 7/16" | 1/4" | Socket Cap | 300 Stainless Steel | Silicone |
| SE31F0050HSEALSSS | 5/16-24 | 1/2" | 1/4" | Socket Cap | 300 Stainless Steel | Silicone |
| SE31F0056HSEALSSS | 5/16-24 | 9/16" | 1/4" | Socket Cap | 300 Stainless Steel | Silicone |
| SE31F0062HSEALSSS | 5/16-24 | 5/8" | 1/4" | Socket Cap | 300 Stainless Steel | Silicone |
| SE31F0075HSEALSSS | 5/16-24 | 3/4" | 1/4" | Socket Cap | 300 Stainless Steel | Silicone |
| SE31F0087HSEALSSS | 5/16-24 | 7/8" | 1/4" | Socket Cap | 300 Stainless Steel | Silicone |
| SE31F0100HSEALSSS | 5/16-24 | 1" | 1/4" | Socket Cap | 300 Stainless Steel | Silicone |
| SE37C0050HSEALSSS | 3/8-16 | 1/2" | 5/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE37C0056HSEALSSS | 3/8-16 | 9/16" | 5/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE37C0062HSEALSSS | 3/8-16 | 5/8" | 5/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE37C0075HSEALSSS | 3/8-16 | 3/4" | 5/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE37C0087HSEALSSS | 3/8-16 | 7/8" | 5/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE37C0100HSEALSSS | 3/8-16 | 1" | 5/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE37F0050HSEALSSS | 3/8-24 | 1/2" | 5/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE37F0056HSEALSSS | 3/8-24 | 9/16" | 5/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE37F0062HSEALSSS | 3/8-24 | 5/8" | 5/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE37F0075HSEALSSS | 3/8-24 | 3/4" | 5/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE37F0087HSEALSSS | 3/8-24 | 7/8" | 5/16" | Socket Cap | 300 Stainless Steel | Silicone |
| SE37F0100HSEALSSS | 3/8-24 | 1" | 5/16" | Socket Cap | 300 Stainless Steel | Silicone |
Contact Apex Fasteners with your hardware requirements