From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Price list for Perfloc nuts from the Engineering Improvement Company, Limited.
| Identifier | ExFiles\Box 77\5\ scan0215 | |
| Date | 25th August 1914 guessed | |
| PRICE LIST. PERFLOC NUTS. 3/8 inch ... 45/- per gross, Bright Nuts. 1/2 inch ... 50/- " " 5/8 inch ... 62/6 " " 3/4 inch ... 75/- " " 7/8 inch ... 107/6 " " 1 inch ... 140/- " " 1 1/4 inch ... 210/- " " Other sizes Whitworth Standard at the same ratio. (All sizes made to order.) 15 % Discount on all Orders over £5. When the Order is over the value of £5, the nuts are delivered, packing cases and carriage free, in the United Kingdom, but packing cases are charged in full if not returned to us carriage paid within 14 days from date of delivery. Although as may be observed the prices of Perfloc nuts are more than those of ordinary nuts, considering the cost of workmanship and extra nuts to be supplied, the Engineering Improvement Company are prepared to consider contracts for the supplying and maintaining nuts in position where there is vibration at less cost than the price of ordinary nuts. ENGINEERING IMPROVEMENT COMPANY, LIMITED, 4A, First Avenue Hotel Buildings, High Holborn, London, W.C. Telegrams: "PERFLOC, HOLB, LONDON." Telephone: 647 HOLBORN. | ||