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Close Tolerance Screw
Model 11925C5-18A
Quick Information about 11925C5-18A
3a thread class, steel comp xm-13 overall material, passivate overall surface treatment, unjf thread series designator.
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Product Details
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NSN:5305-01-494-9230 (5305014949230)
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Thread Direction:Right-hand
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Thread Length:Between 0.505 inches and 0.572 inches
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Fastener Length:Between 1.620 inches and 1.707 inches
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Head Style:Flat countersunk undercut
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Head Diameter:Between 0.575 inches and 0.635 inches
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Head Height:Between 0.088 inches and 0.090 inches
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Grip Diameter:Between 0.3115 inches and 0.3120 inches
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Internal Style:High-torque
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Thread Diameter:0.3125 inches
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Grip Length:Between 1.115 inches and 1.135 inches
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Thready (tpi):24
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Countersink Angle:99.0 degrees
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Surface Finish:32.0 microinches grip
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Surface Finish:32.0 microinches threads
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Part Agency:Navy special project
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Material Specification:Ams 5629 assn standard single material response
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Surface Specification:Qq-p-35 federal specification single treatment response
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Schedule B Code:7318152000
Classification
Bolts and bolts and their nuts or washers exported in the same shipment
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
Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicatorsPackaging & Shipping
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