NSN 5306-01-266-8576
Close Tolerance Hex Head Bolt
Between 0.845 inches and 0.875 inches fastener length, double hexagon extended washer head style, between 0.290 inches and 0.310 inches head height, width between flats: between 0.306 inches and 0.315 inches .
Manufacturer part number NAS1271H6 for national stock number 5306012668576.
Datasheet
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Product description
Close Tolerance Bolt NSN 5306-01-266-8576.
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MPN or Model
NAS1271H6
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Schedule B
8109.90.0000 (Zirconium and articles thereof nesoi) -
NMF (National Motor Freight)
136500 - Metal NOI/metal Alloys NOI -
Unit Weight (Est.)
0.1 lb -
Thread Class
3a -
Thread Direction
Right-hand -
Thread Length
Between 0.460 inches and 0.510 inches -
Fastener Length
Between 0.845 inches and 0.875 inches -
Head Style
Double hexagon extended washer -
Head Height
Between 0.290 inches and 0.310 inches -
Width Between Flats
Between 0.306 inches and 0.315 inches -
Extended Washer Diameter
0.360 inches -
Extended Washer Thickness
Between 0.059 inches and 0.079 inches -
Hole Diameter
Between 0.032 inches and 0.042 inches -
Grip Diameter
Between 0.2485 inches and 0.2495 inches -
Thread Diameter
0.250 inches -
Grip Length
Between 0.365 inches and 0.385 inches -
Hole Quantity
4 -
Hole Type
Drilled -
Thready Qty Per Inch (tpi)
28 -
Hole Configuration Style
Double hexagon longitudinal hole -
Surface Finish
63.0 microinches grip -
Material
Titanium alloy uns r56400 -
Material Specification
Ams4967 assn standard single material response -
Thread Series Designator
Unjf -
Specification Data
80205-nas1271 professional/industrial association standard
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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.
Pricing and Availability
Get a quote for 5306-01-266-8576 close tolerance boltManufacturer Part Numbers and Alternates
MPN manufacturer part number | Registrant or Supplier |
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NAS1271H6 | National Aerospace Standards |