Standoff Electrical Insulators – 2-1/2″ Diameter Round Body
| UL listed Part # | Height(+/- .015”) in(mm) | Voltage (AC) | Threads Size X Depth | Insert Material | Box Qty |
| AR2781-11SAL | 2 5/8 (67) | 3400 | 5/8-11 x 5/8 | Alum | 48 |
| AR2781-11SST | 2 5/8 (67) | 3400 | 5/8-11 x 5/8 | Steel | 48 |
| AR2781-13AAL | 2-1/2(63) | 3,200 | 1/2-13 x 9/16 | Alum | 48 |
| AR2781-13AST | 2-1/2(63) | 3,200 | 1/2-13 x 9/16 | Steel | 48 |
| AR2781-16A | 2 1/2(63) | 3,200 | 3/8-16 x 3/4 | Steel | 48 |
| AR2781-16B-30 | 2 3/4(70) | 3,600 | 3/8-16 x 3/4 | Steel | 48 |
| AR2781-16C | 3(76) | 3,600 | 3/8-16 x 3/4 | Steel | 48 |
| AR2781-16D | 3 1/4(83) | 4,500 | 3/8-16 x 3/4 | Steel | 48 |
| AR2781-16E | 3 1/2(89) | 5,000 | 3/8-16 x 3/4 | Steel | 36 |
| AR2781-16F | 3 3/4(95) | 5,000 | 3/8-16 x 3/4 | Steel | 30 |
Physical & Electrical Properties
ELECTRICAL PROPERTIES INSULATOR SERIES 2781
| Tensile Strength (lbs) | Cantilever Strength (lbs) | Voltage Rating (V) * | Arc Resistance(sec) | Tracking Index (V) | Creep Distance (in) ** | Dielectric Strength, ST (V) | Water Absorption (%) | Ul Flame Resistance |
| 3,500 | 1,500 | 3,200-5,000 | 180 | 500 | H + 0.313 | 20,000 | 0.14 | 94 V-0 |
* Voltage rating increases with insulator height
** H = insulator height
NOTE: This technical data is believed to be reliable. However, data is not to be construed as a warranty or representation for which Penn Compression assumes legal responsibility. Users should perform sufficient verification and testing to determine suitability for their own specific use
