Model: NAS1081-4A8L

Setscrew

Properties:

Thread Class
3a
Thread Direction
Right-hand
Fastener Length
Between 0.490 inches and 0.510 inches
Head Style
Headless (setscrew)
Point Diameter
Between 0.118 inches and 0.132 inches
Point Style
Flat
Internal Drive Style
Hexagon
Thread Diameter
0.250 inches
Width Across Flats
Between 0.125 inches and 0.127 inches
Thready Qty Per Inch (tpi)
28
Part Name Assigned By Controlling Agency
Screwset, self-locking
Material
Steel comp 4037 or steel comp 4137h or steel comp 8630 or steel comp 8740
Surface Treatment
Cadmium
Surface Treatment Specification
11-p-416, ty ii, cl 2 federal specification single treatment response
Thread Series Designator
Unjf
NSN
5305-01-499-1963
Part Number
NAS1081-4A8L
Description
Setscrew
CAGE
80205

An externally threaded device whose threaded portion is of one nominal diameter with or without a head and having a cup, cone, or other type of machined point designed to prevent or restrict relative movement of parts and designed to be driven with either a wrench or inserted driver. A locking feature may be incorporated in the design of the head or threads.

Part NAS1081-4A8L NSN 5305-01-499-1963

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
06672
FIIG:
A003B0
Concept No.:
App. Key:
SQ
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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