Model: NAS6604D4X

Close Tolerance Bolt

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
0.425 inches
Fastener Length
Between 0.660 inches and 0.690 inches
Head Style
Dished hexagon
Head Height
Between 0.125 inches and 0.140 inches
Width Between Flats
Between 0.429 inches and 0.439 inches
Grip Diameter
Between 0.2641 inches and 0.2651 inches
Shank Unthreaded Hole Diameter
0.076 inches first hole and 0.086 inches first hole
Thread Diameter
0.250 inches
Grip Length
Between 0.240 inches and 0.260 inches
Thready Qty Per Inch (tpi)
28
Distance From Head Largest Bearing Surface To Shank Hole Center
0.487 inches first hole and 0.507 inches first hole
Material
Steel comp 4140 or steel comp 4340 or steel comp e4340 or steel comp 8740
Material Specification
Ams6349 assn standard 1st material response or ams6382 assn standard 2nd material response or ams6322 assn standard 3rd material response or ams-s-5000 assn standard 4th material response or ams6415 assn standard 5th material response
Surface Treatment
Cadmium
Surface Treatment Specification
Qq-p-416, type 2, class 2 federal specification single treatment response
Thread Series Designator
Unjf
Specification Data
80205-nas6604 professional/industrial association standard
NSN
5306-01-525-5490
Part Number
NAS6604D4X
Description
Bolt,close Tolerance
CAGE

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 NAS6604D4X NSN 5306-01-525-5490

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
27851
FIIG:
A003B0
Concept No.:
App. Key:
BC
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
A
ESD:
A
ESD:
A
MMAC:
CRITL:
X

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Schedule B and Export
  • Schedule B: 7318152000
  • SITC: 69421
  • End Use: Iron and steel products, other
  • NAICS: 332722
  • USDA: 1

Freight Class: Bolts and bolts and their nuts or washers exported in the same shipment

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