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Close Tolerance Screw
Model NAS1581V4R11
Quick Information about NAS1581V4R11
3a thread class, right-hand , 0.403 inches thread length, 1.091 inches fastener length, flush head style, 0.399 inches head diameter
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Product Details
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NSN:5305-01-646-2420 (5305016462420)
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Thread Direction:Right-hand
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Thread Length:0.403 inches
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Fastener Length:1.091 inches
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Head Style:Flush
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Head Diameter:0.399 inches
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Head Height:0.063 inches
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Grip Diameter:Between 0.249 inches and 0.250 inches
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Internal Style:Torque-set ribbed
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Thread Diameter:0.250 inches
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Grip Length:0.688 inches
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Thready (tpi):28
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Schedule B Code:8108908000
Classification
Other wrought titanium, nesoi
Definition Close Tolerance Screw
A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. Items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the screw thread standards, fed std h28 and/or other nationally recognized standards. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.
Part Identification
Part Materials
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