Model: 4-40X.438LG

Machine Screw

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.351 inches and 0.438 inches
Fastener Length
Between 0.401 inches and 0.438 inches
Head Style
Hexagon
Head Height
Between 0.049 inches and 0.060 inches
Width Between Flats
Between 0.181 inches and 0.187 inches
Thread Diameter
0.112 inches
Thready Qty Per Inch (tpi)
40
Screw Material
Steel comp 304
Screw Surface Treatment
Passivate
Screw Surface Treatment Specification
Qq-p-35 type 2 or type 3 federal specification single treatment response
Thread Series Designator
Unc
NSN
5305-01-035-4301
Part Number
4-40X.438LG
Description
Screw,machine
CAGE

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 4-40X.438LG NSN 5305-01-035-4301

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:
U
ESD:
ESD:
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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