Each weekday, TheStreet.com Ratings compiles a list of the top five stocks in five categories -- fast-growth, all-around value, large-cap, mid-cap and small-cap -- and publishes these lists in the

Ratings section of our Web site.

This list, updated daily, is based on data from the close of the previous trading session. Today, fast-growth stocks are in the spotlight. These are stocks of companies that are projected to increase revenue and profit by at least 12% in the coming year and rank near the top of all stocks rated by our proprietary quantitative model, which looks at over 60 factors.

In addition, the stocks must be followed by at least one financial analyst who posts estimates on the Institutional Brokers' Estimate System. Please note that definitions of revenue vary by industry, and this screen does not make adjustments for acquisitions, which can materially affect posted results. Likewise, earnings-per-share growth may be affected by accounting charges, share repurchases and other one-time items.

Note that no provision is made for off-balance-sheet assets such as unrealized appreciation/depreciation of investments, market value of real estate or contingent liabilities that might affect book value. This could be material for some companies with large underfunded pension plans.

Today leads off with

Heico

(HEI.A)

, a maker of aerospace, defense and electronics products. The company has been rated buy since July 2005. It has a largely solid financial position with reasonable debt levels by most measures, an impressive record of earnings-per-share growth, good cash flow from operations and solid stock price performance.

The company has demonstrated a pattern of positive EPS growth over the past two years, and its revenue growth of 31.62% in the second quarter compared with the same period in 2006 came in higher than the industry average of 6.3%. The stock's sharp appreciation over the last year has driven it to a price level that is now somewhat expensive compared to the rest of its industry. The other strengths this company shows, however, justify the higher price levels.

Precision Castparts

(PCP)

, which makes complex metal components and products for the aerospace and industrial gas turbine industries, has been rated a buy since August 2005. The company has recently made acquisitions expanding its casting, forging and fastener product offerings, and these should fuel revenue growth. Unprecedented aerospace fastener demand from both original equipment manufacturers and aftermarket customers offer ample opportunity for Precision to further enhance its sales for the fastener segment.

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Because Precision depends on the aerospace industry for its top-line growth, any slowdown in that industry could lead to reduced demand for its products. Other possible concerns include fluctuations in the prices of basic materials and any unseen difficulty in integrating recent acquisitions.

Designing, manufacturing and servicing electrical components and equipment for aircraft and industrial engines,

Woodward Governor

( WGOV) has had a buy rating since August 2005. It demonstrates solid revenue growth, a very low debt-to-equity ratio, a largely solid financial position with reasonable debt and valuation levels. The company's stock price increased by 96.3% in the year ended on Aug. 3, and should continue to move higher. These strengths outweigh the company's subpar net income growth.

Triumph Group

(TGI) - Get Triumph Group, Inc. Report

, an aircraft-components company, has maintained a buy rating since August 2005. The company has demonstrated impressive growth in revenue, net income and earnings per share, along with good cash flow from operations. The company has shown a pattern of positive EPS growth over the past two years, a trend TheStreet.com Ratings team believes will continue in the coming year. Triumph also has impressive net operating cash flow.

Although the company may harbor some minor weaknesses, we feel they are unlikely to have a significant impact on results.

Rounding out our list today is

Harsco

(HSC) - Get Harsco Corporation Report

, which provides industrial services and engineered products to the steel, construction, railways and energy industries. It has been rated a buy since August 2005. The company demonstrates robust revenue growth, good cash flow from operations, net income growth that has outperformed its industry average and a pattern of positive EPS growth over the past two years.

Powered by these strong financial results, Harsco's stock has appreciated by 38.07% in the 12-month period prior to Aug. 3. The growth has put it at a price level that is relatively expensive compared with the rest of its industry, but given the Harsco's strengths, the higher price level is justified.

Harsco's strengths outweigh the company's low profit margins.