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Close Tolerance Bolt
Model SLB253-4D27
Quick Information about SLB253-4D27
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:5306-01-030-4657 (5306010304657)
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Thread Direction:Right-hand
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Thread Length:Between 0.443 inches and 0.493 inches
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Fastener Length:Between 2.141 inches and 2.171 inches
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Head Style:Double hexagon w/hole
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Head Height:Between 0.290 inches and 0.310 inches
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Width Flats:Between 0.304 inches and 0.313 inches
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Extended Diameter:Between 0.428 inches and 0.438 inches
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Extended Thickness:Between 0.059 inches and 0.079 inches
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Grip Diameter:Between 0.2490 inches and 0.2495 inches
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Shank Diameter:0.076 inches first hole and 0.081 inches first hole
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Thread Diameter:0.250 inches
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Grip Length:Between 1.678 inches and 1.698 inches
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Thready (tpi):28
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Distance Center:1.949 inches first hole and 1.989 inches first hole
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Material Specification:Ams 5629 assn standard single material 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 Bolt
An externally threaded fastener whose unthreaded portion is of a specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a specific diameter for items one inch (25 mm) or less in diameter. Items over one inch (25 mm) in diameter shall have a tolerance of fifteen ten-thousandths (0.0015) of an inch (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001) of an inch (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 not designed to be held or driven with an inserted driver, nor is it designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. For items having close tolerance, and fabricated from material having 160,000 pounds per square inch (1100 megapascals) minimum tensile strength, see bolt, shear. For items fabricated from material having less than 160,000 pounds per square inch (1100 megapascals) minimum tensile strength and not having a close tolerance, see bolt, machine.
Part Identification
Part Materials
Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicatorsPackaging & Shipping
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