Model: LK21262-24

Socket Head Cap Screw

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.339 inches and 0.452 inches
Fastener Length
Between 0.422 inches and 0.452 inches
Head Style
Flat chamfer
Head Diameter
Between 0.457 inches and 0.468 inches
Head Height
Between 0.306 inches and 0.312 inches
Locking Feature
Patch threads or pellet threads or strip threads
Internal Drive Style
Hexagon
Thread Diameter
0.312 inches
Width Across Flats
Between 0.250 inches and 0.253 inches
Thready Qty Per Inch (tpi)
24
Min. Tensile Strength (psi)
160000 pounds per square inch
Hardness Rating
36.0 rockwell c and 45.0 rockwell c
Surface Finish
32.0 microinches threads
Material
Steel
Surface Treatment
Cadmium and chromate
Surface Treatment Specification
Qq-p-416, type 2, cl 3 federal specification all treatment responses
Thread Series Designator
Unf
Nondefinitive Specification/std Data
6 type
NSN
5305-00-144-8855
Part Number
LK21262-24
Description
Screw,cap,socket Head
CAGE
26304

An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes items with bevel (conical) heads. See bolt, internal wrenching. Excludes screw, shoulder; and screw, machine.

Part LK21262-24 NSN 5305-00-144-8855

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
16282
FIIG:
A003B0
Concept No.:
App. Key:
SC
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:
--
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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