B-128549:
Aug 22, 1956
TO THE PHILIP CAREY MANUFACTURING COMPANY: FURTHER REFERENCE IS MADE TO YOUR LETTER OF JULY 3. ARE RESTRICTIVE AND SHOULD BE AMENDED TO PERMIT THE USE OF OTHER INSULATING MATERIALS WHICH YOU CONTEND ARE EQUAL OR SUPERIOR TO THAT REQUIRED BY THE SPECIFICATIONS. WE ARE ADVISED THAT THE INSULATING MATERIAL REQUIRED BY THE PARTICULAR SPECIFICATION (FEDERAL SPECIFICATION NO. HH-I-551A) IS CELLULAR GLAS...