Model: NAS8603-1

Close Tolerance Screw

Properties:

Thread Class
Aal
Thread Direction
Right-hand
Thread Length
0.323 inches
Fastener Length
0.385 inches
Head Style
Flat countersunk
Head Diameter
Between 0.266 inches and 0.303 inches
Grip Length
0.062 inches
Thready Qty Per Inch (tpi)
32
Surface Finish
32.0 microinches bearing surface of head
Surface Finish
32.0 microinches grip
Surface Finish
32.0 microinches threads
Part Name Assigned By Controlling Agency
Bolt, 100degree reduced head, phillips recess, close tolerance, alloy steel, short thread
Material
Steel comp e4340 or steel comp 8740
Material Specification
Mil-s-6049 military specification 1st material response and ams6322 assn standard 2nd material response and mil-s-6049 military specification 2nd material response
Surface Treatment
Cadmium and chromate
Surface Treatment Specification
Qq-p-416 ty2 cl2 federal specification all treatment responses
Thread Series Designator
Unjf
Specification Data
80205-nas8603 professional/industrial association standard
NSN
5305-01-533-4729
Part Number
NAS8603-1
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 NAS8603-1 NSN 5305-01-533-4729

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:
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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