
Image shown is representative and may differ from the actual product in size, proportions, and color shade
4.500 in
(114.30 mm)
7.120 in
(180.85 mm)
5/16"

NBR NB50BK40 Ring Gasket, Size: 300#-4"-RN-5/16"
Material: NBR NB50BK40 Ring Gasket
Size: 300#-4"-RN-5/16" Ring Gasket
Part Number: NB50BK40-300#-4"-RN-5/16"
Color: Black
Detailed Description
NB50BK40-300#-4"-RN-5/16" is a Black, 50 Shore A, NBR (Nitrile, Buna-N) Ring Gasket. It is a 50 durometer NBR (Nitrile, Buna-N). [NB50BK40 is manufactured with the following features & specifications: UL 157, UL Listed Material. NB50BK40-300#-4"-RN-5/16" is size 300#-4"-RN-5/16" Ring Gasket also referred to as 4 (Pipe Size) x 114.3mm (ID) x 180.85mm (OD) x 5/16" (Thickness). NB50BK40-300#-4"-RN-5/16" is a size 4, 300#-RN ASME Ring Gasket. Material: 50 Durometer NBR NB50BK40 Ring Gasket Size: 300#-4"-RN-5/16", 4 Pipe Size X 114.3mm ID X 180.85mm OD X 5/16" Thickness

| Technical Specification | Value |
|---|---|
| Compound Number | NB50BK40 |
| Material | NBR (Nitrile, Buna-N) |
| Color | Black |
| Durometer | 50 Shore A Hardness |
| High Temperature | 60 °C / 140 °F |
| Low Temperature | -40 °C / -40 °F |
| Geometry Specifications | |
| Type | Ring Gasket |
| Size | 300#-4"-RN-5/16" |
| Pipe Size | 4 |
| ID | 114.30 mm / 4.500 in |
| OD | 180.85 mm / 7.120 in |
| Thickness | 5/16" |
| Other Specifications | |
UL 157 | |
UL Listed Material | |


