Model: AN531-4R4

Tapping Screw

Properties:

Fastener Length
0.250 inches
Head Style
Flat countersunk
Head Diameter
Between 0.216 inches and 0.225 inches
Internal Drive Style
Cross recess type 1
Nonmachine Thread Style
Dog type (type b or c)
Countersink Angle
Between 80.0 degrees and 82.0 degrees
Nonmachine Thread Diameter
0.112 inches
Material
Steel comp 4130
Material Specification
Qq-s-685 cond n federal specification single material response
Surface Treatment
Cadmium or zinc
NSN
5305-00-167-2373
Part Number
AN531-4R4
Description
Screw,tapping
CAGE
88044

A hardened externally threaded fastener whose thread extends to the bearing surface of the head. The thread may be fluted or otherwise designed to cut or form its own mating thread. Excludes screw, assembled washer.

Part AN531-4R4 NSN 5305-00-167-2373

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
41756
FIIG:
A003B0
Concept No.:
App. Key:
SN
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

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
093486
UFC:
48950
LTL:
RATING VARIABLE
LCL:
50.0
WCC:
713
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 7318140000
  • SITC: 69421
  • End Use: Iron and steel products, other
  • NAICS: 332722
  • USDA: 1

Freight Class: Self-tapping screws of iron or steel

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