Model: 21251

Setscrew

Special Features:

One drilled slot on side of head, 0.188 inch in width

Properties:

Thread Class
2a
Thread Direction
Right-hand
Fastener Length
5.000 inches
Head Style
Flat countersunk
Head Diameter
2.031 inches
Point Style
Oval
Internal Drive Style
W/o internal drive
Thread Diameter
1.125 inches
Thready Qty Per Inch (tpi)
7
Countersink Angle
78.0 degrees
Material
Steel comp 4140
Material Specification
Sae assn standard single material response
Thread Series Designator
Unc
NSN
5305-01-158-6765
Part Number
21251
Description
Setscrew
CAGE
20874

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 21251 NSN 5305-01-158-6765

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:
ESD:
MMAC:
CRITL:
X

Freight Classification

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

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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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