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Close Tolerance Screw
Model 123743-4-10A
Quick Information about 123743-4-10A
3a thread class, titanium alloy uns r56400 overall material, aluminum overall surface treatment, unjf thread series designator.
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Product Details
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NSN:5305-01-327-9688 (5305013279688)
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Thread Direction:Right-hand
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Thread Length:0.425 inches
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Fastener Length:Between 1.035 inches and 1.065 inches
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Head Style:Flat countersunk
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Head Diameter:Between 0.449 inches and 0.507 inches
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Grip Diameter:Between 0.2485 inches and 0.2495 inches
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Internal Style:Offset cruciform (torque set)
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Thread Diameter:0.250 inches
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Grip Length:Between 0.615 inches and 0.635 inches
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Thready (tpi):28
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Min. (psi):160000 pounds per square inch
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Countersink Angle:Between 99.0 degrees and 101.0 degrees
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Surface Finish:32.0 microinches bearing surface of head
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Surface Finish:32.0 microinches grip
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Surface Finish:32.0 microinches threads
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Material Specification:Ams4928 assn standard single material response or ams4967 assn standard single material response
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Surface Specification:Nas4006 assn standard single treatment response
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Schedule B Code:8109900000
Classification
Zirconium and articles thereof 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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