Model: NAS1801-4-45

Machine Screw

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
2.812 inches
Fastener Length
2.812 inches
Head Style
Hexagon
Head Height
Between 0.125 inches and 0.140 inches
Width Between Flats
Between 0.367 inches and 0.376 inches
Internal Drive Style
Cross recess type iii
Thread Diameter
0.250 inches
Thready Qty Per Inch (tpi)
28
Min. Tensile Strength (psi)
160000 pounds per square inch
Screw Material
Steel comp 4340 or steel comp 8740
Screw Material Specification
Mils-s-5000 military specification single material response or mil-s-6049 military specification single material response or ams 6322 assn standard single material response
Screw Surface Treatment
Cadmium
Screw Surface Treatment Specification
Qq-p-416, type ii, class 2 federal specification single treatment response
Thread Series Designator
Unjf
NSN
5305-01-603-6145
Part Number
NAS1801-4-45
Description
Screw,machine
CAGE
80205

An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below no. 10 (0.190 in./5 mm). No. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. Excludes bolt, clevis; bolt, externally relieved body; screw, externally relieved body; and screw, assembled washer. See also, screw, instrument; bolt, machine; bolt, internal wrenching; and screw, cap socket head.

Part NAS1801-4-45 NSN 5305-01-603-6145

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
06657
FIIG:
A500D0
Concept No.:
App. Key:
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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