Model: NAS5204U18

Close Tolerance Screw

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
0.370 inches
Fastener Length
Between 1.480 inches and 1.510 inches
Head Style
Pan no. 2
Head Diameter
Between 0.473 inches and 0.492 inches
Head Height
Between 0.133 inches and 0.150 inches
Grip Diameter
Between 0.2490 inches and 0.2495 inches
Internal Drive Style
Tri-wing recess
Thread Diameter
0.250 inches
Grip Length
Between 1.115 inches and 1.135 inches
Thready Qty Per Inch (tpi)
28
Min. Tensile Strength (psi)
160000 pounds per square inch
Material
Titanium alloy
Material Specification
Ams 4928 assn standard single material response
Thread Series Designator
Unjc
Specification Data
80205-nas5204 professional/industrial association standard
NSN
5305-01-195-2963
Part Number
NAS5204U18
Description
Screw,close Tolerance
CAGE

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 NAS5204U18 NSN 5305-01-195-2963

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
29294
FIIG:
A003B0
Concept No.:
App. Key:
SS
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:
U
ESD:
ESD:
MMAC:
CRITL:
X

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Schedule B and Export
  • Schedule B: 8109900000
  • SITC: 69987
  • End Use: Finished metal shapes
  • NAICS: 331491
  • USDA: 1

Freight Class: Zirconium and articles thereof nesoi

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