RAF Electronic Hardware AJ-553 Plain Knurled Thumb Screw 4-40 Thd., 5/16 Long

RAF Electronic Hardware AJ-553 Plain Knurled Thumb Screw 4-40 Thd., 5/16 Long Reviews

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General purpose thumb screws for a wide variety of applications. The washer face provides an excellent bearing surface and extends the height of the knob from the surface. Steel is zinc coated. Stainless and aluminum have plain finish. Brass is zinc, clear chromate plated.

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Jul 31, 2011 14:07:04

1.12 dia., 5/8-11x3.00 lg. thd., Regular TypeTorque Thumb Screw (1 Each)

1.12 dia., 5/8-11x3.00 lg. thd., Regular TypeTorque Thumb Screw (1 Each) Reviews

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Torque Thumb Screws - Regular Type - For use in all normal supporting operations.

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Jul 30, 2011 09:28:06

10-32 X 2 Thumb Screws / Type P / No Shoulder / Steel / Zinc / 1,000 Pc. Carton

10-32 X 2 Thumb Screws / Type P / No Shoulder / Steel / Zinc / 1,000 Pc. Carton Reviews

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10-32 X 2 Thumb Screws / Type P / No Shoulder / Steel / Zinc / 1,000 Pc. Carton Feature

• 10-32 X 2 Thumb Screws
• Type P
• Low Carbon Steel
• Zinc Plated

10-32 X 2 Thumb Screws / Type P / No Shoulder / Steel / Zinc

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Jul 29, 2011 02:49:09

8-32 Thd., 13/16 Lg., 1/4 Head Dia., Knurled Head Screws, 303 Stainless Steel (1 Each)

8-32 Thd., 13/16 Lg., 1/4 Head Dia., Knurled Head Screws, 303 Stainless Steel (1 Each) Reviews

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Thumb Screws - Knurled Head Screws Type 303 Stainless Steel CAD drawing for this part is available on our website.

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Jul 27, 2011 16:53:08

Thumb Screw Zinc 5/16-18 X 2 1/2 (Pack of 200)

Thumb Screw Zinc 5/16-18 X 2 1/2 (Pack of 200) Reviews

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Thumb Screw Zinc 5/16-18 X 2 1/2 (Pack of 200)

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Jul 26, 2011 21:04:08

Northwestern Tools Inc KHS-106 Dog Point Knurled Thumb Screw 1/4-20 Thd., 2 1/4 Long

Northwestern Tools Inc KHS-106 Dog Point Knurled Thumb Screw 1/4-20 Thd., 2 1/4 Long Reviews

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Knurled Head Screws - Dog Point - Used where permanent location of one part in relation to another is desired. Point is usually spotted in hole or slot. Heat treated steel with black oxide finish. CAD drawing for this part is available on our website.

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Jul 26, 2011 00:41:04

8-32 X 3/8 Thumb Screw / Round Head / Knurled / Aluminum / 100 Pc. Carton

8-32 X 3/8 Thumb Screw / Round Head / Knurled / Aluminum / 100 Pc. Carton Reviews

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8-32 X 3/8 Thumb Screw / Round Head / Knurled / Aluminum / 100 Pc. Carton Feature

• 8-32 X 3/8 Thumb Screws
• Round Head
• Aluminum
• Knurled Head

8-32 X 3/8 Thumb Screw / Round Head / Knurled / Aluminum

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Jul 24, 2011 23:22:04

Stainless Steel Thumb Screw, Knurled Head, #6-32, 1/4" Head Diameter, 1/2" Head Height, 1" Length (Pack of 5)

Stainless Steel Thumb Screw, Knurled Head, #6-32, 1/4" Head Diameter, 1/2" Head Height, 1" Length (Pack of 5) Reviews

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Stainless Steel Thumb Screw, Knurled Head, #6-32, 1/4" Head Diameter, 1/2" Head Height, 1" Length (Pack of 5) Feature

• Thumb Screws allow for simple "by-hand" installation
• Stainless Steel is suitable where formability and cost are important considerations
• Knurled head provides extra grip for manual tightening
• Tools not necessary for tightening or loosening
• Coarse threads are better for brittle materials, and will assemble and disassemble more quickly than fine threads

Thumb screws are designed to be tightened and loosened by hand. They come in a variety of head styles, but each includes an easy-grip head which allows for simple "by-hand" installation.

Stainless steels are used for their corrosion resistance, high-temperature strength, scaling resistance, and low-temperature toughness.  These properties account for their extremely wide use in practically every industry. Austenitic Stainless Steels are alloys of iron and carbon that contain between 16% and 30% Chromium, a maximum of 0.15% carbon, along with Nickel (or Manganese), and other alloying elements.  The chromium, which helps develop a passive surface oxide film, provides corrosion resistance in stainless steels.   Austenitic Stainless Steels are designated by a 3 digit SAE Stainless Steel Grade beginning with the number 3 (e.g. 304, 316).  Another common naming convention for Austenitic Stainless Steels are 18/8, 18/10, 18/0, etc. where the 18 refers to the % of Chromium and 8 to the % of Nickel contained in the material.    

Usually found on thumb screws, a knurled surface on the head gives a better gripping surface, making it easier to tighten or loosen fasteners manually.

A threaded fastener's size name includes information about the major external diameter, followed by the threads per inch, which indicates if it is coarse or fine. Coarse threads are better when working with brittle materials; they are sturdier and are easier to thread and unthread compared to fine. Coarse threading also allows for thicker coatings and platings.

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• Nylon 6/6 Thumb Screw, Knurled Head, 1/4"-20, 1" Length (Pack of 10)
• Nylon Thumb Screw, Knurled Head, Slotted Drive, #6-32, 2-1/4" Length (Pack of 50)
• Stainless Steel Machine Screw, Pan Head, Phillips Drive, #1-72, 5/16" Length (Pack of 100)
• Stainless Steel 18-8 Thumb Screw, Knurled Head, #8-32, 3/8" Length (Pack of 10)
• Stainless Steel Socket Cap Screw, Hex Socket Drive, MIL-SPEC, 1/4"-20, 5/8" Length (Pack of 50)

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Jul 24, 2011 04:11:03

5/16-18 X 4 Thumb Screws / Type P / Shoulder / Steel / Zinc / 200 Pc. Carton

5/16-18 X 4 Thumb Screws / Type P / Shoulder / Steel / Zinc / 200 Pc. Carton Reviews

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5/16-18 X 4 Thumb Screws / Type P / Shoulder / Steel / Zinc / 200 Pc. Carton Feature

• 5/16-18 X 4 Thumb Screws
• Type P
• Low Carbon Steel
• Zinc Plated

5/16-18 X 4 Thumb Screws / Type P / Shoulder / Steel / Zinc

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Jul 23, 2011 07:45:04

Northwestern Tools Inc QT-0 Quarter-Turn Thumb Screw 10-24 Thd., 1. Long

Northwestern Tools Inc QT-0 Quarter-Turn Thumb Screw 10-24 Thd., 1. Long Reviews

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Quarter Turn Screws - Available in unhardened and hardened steel and stainless steel. Steel have a black oxide finish. Hardened are case hardened .003/.005 deep. Stainless are made from Type 303 stainless steel. CAD drawing for this part is available on our website.

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Jul 22, 2011 04:07:02

Zinc Plated Steel Thumb Screw, Spade Head without Shoulder, 1/4"-20, 3" Length (Pack of 50)

Zinc Plated Steel Thumb Screw, Spade Head without Shoulder, 1/4"-20, 3" Length (Pack of 50) Reviews

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Zinc Plated Steel Thumb Screw, Spade Head without Shoulder, 1/4"-20, 3" Length (Pack of 50) Feature

• Thumb Screws allow for simple "by-hand" installation
• Zinc Plated Steel fasteners are suitable where strength and corrosion resistance are primary considerations
• Spade head is easy to grasp
• Tools not necessary for tightening or loosening
• Coarse threads are better for brittle materials, and will assemble and disassemble more quickly than fine threads

Thumb screws are designed to be tightened and loosened by hand. They come in a variety of head styles, but each includes an easy-grip head which allows for simple "by-hand" installation.

Steels are designated by a 4 number SAE Steel grade.  The first two digits indicate the primary materials used to form the steel.  The last 2 digits identify the percentage of carbon for the alloy (in hundredths).  The steel used in these fasteners has a tensile strength ranging from 100,000 to 150,000 psi (pounds per square inch).  Zinc Plating helps to prevent corrosion.

Spade head styles are perfect when frequent adjustments are necessary. They have a wide head which allows for easy tightening and loosening by hand.

A threaded fastener's size name includes information about the major external diameter, followed by the threads per inch, which indicates if it is coarse or fine. Coarse threads are better when working with brittle materials; they are sturdier and are easier to thread and unthread compared to fine. Coarse threading also allows for thicker coatings and platings.

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Jul 21, 2011 06:39:04

10-24 X 3/4 Thumb Screws / Type P / Shoulder / Steel / Zinc / 1,000 Pc. Carton

10-24 X 3/4 Thumb Screws / Type P / Shoulder / Steel / Zinc / 1,000 Pc. Carton Reviews

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10-24 X 3/4 Thumb Screws / Type P / Shoulder / Steel / Zinc / 1,000 Pc. Carton Feature

• 10-24 X 3/4 Thumb Screws
• Type P
• Low Carbon Steel
• Zinc Plated

10-24 X 3/4 Thumb Screws / Type P / Shoulder / Steel / Zinc

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Jul 19, 2011 15:46:09

10-32 X 1/2 Thumb Screw / Round Head / Knurled / Washer Face / Stainless Steel / 100 Pc. Carton

10-32 X 1/2 Thumb Screw / Round Head / Knurled / Washer Face / Stainless Steel / 100 Pc. Carton Reviews

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10-32 X 1/2 Thumb Screw / Round Head / Knurled / Washer Face / Stainless Steel / 100 Pc. Carton Feature

• 10-32 X 1/2 Thumb Screws
• Round Head
• Stainless Steel
• RoHS Compliant

10-32 X 1/2 Thumb Screw / Round Head / Knurled / Washer Face / Stainless Steel

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Jul 18, 2011 16:53:19