1/4-20 X 11 Hex Head Cap Screw Stainless Steel
Product Detailed Description
USS Coarse Thread
Used in products that require general atmospheric corrosion resistance, such as chemical and food-processing equipment.
Some chemical environments may require special corrosion resistant materials and precautions.
A cap screw made from one of the following austenitic alloys: 303, 303Se, 304, XM7, all of which are characterized as having a chromium content of 17-19% and nickel content of 8-10%.
The austenitic alloys develop their strength through work hardening during the fastener manufacturing process, as seen from the hardness properties below. The only heat trement normally avaailable on ausyenitic stainless alloys in annealing, whitch is done at approximately 1900°F to a dead soft condition and is not normally thermally reversible.
Manufactured to ASME B18.2.1 dimensions
Hardness: 1/4" through 5/8" diameter: Rockwell B95-C32 3/4" through 1" diameter: Rockwell B80-C32
Yield Strength: 1/4" through 5/8" diameter, 2.25D and longer: 65,000 psi. min. 3/4" (2.25D & longer) &
7/8" through 1" diameter (3D & Longer): 45,000 psi. minimum
Tensile Strength*: 1/4: through 5/8" diameter, 2.25D and longer: 100,000 - 150,000 psi.
3/4" (2.25d & longer) & 7/8" through 1" diameter (3D & longer): 85,000 - 140,000 psi.
Elongation in 4D*: 1/4" through 5/8" diameter: 20% minimum; 3/4" through 1" diameter; 25% minimum.
Thread Length: Double the diameter plus 1/4" up to 6" length.
D=Normal diameter of the screw in inches
*These properties are tested only on machined specimens when the testing machine cannot provide for full testing of the parts.
**Product standards require the manufacturer's head marking to appear on the top of all cap screws 1/4" diameter and larger.
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