Insulators Hemingray 21: Home: Hemingray 21-47 G.S.C. Clear Glass Insulator - Hemingray

Insulators Hemingray 21 Popular Q&A

Q: How much are green glass insulator Hemingray no.19 worth?
A: Your Hemingray No. 19 is what is called a signal insulator. Read More »

Q: How much would i get approximately for 14 hemingray green glass i...
A: what kind or number on the insulator ? if its a hemingray 9 16 42 45 etc there junk. ( unless a rare color) Hemingray was the most mass produced insulator made.... Read More »

Q: What is the duration of insulation on December 21 at the South Po...
A: Duration of Insulation is what the length of Read More »

Q: Where R-21 insulation is required for exterior walls, what can yo...
A: You would have to put r-14 in the walls and then 1' foil face 4 x 8 sheets on the exterior wall, that would get you to 20.5 R. Thats the only way to get you the... Read More »

Q: 42 , has an 8 with 9 dots following it , made in usa . 1 hemingra...
A: On the left is a C.P.R. beehive style with ink stamped markings (These also exist with incuse markings which are more common)  CPR is the Canadian Pacific Railr... Read More »

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