Model: 2491621

Socket Head Cap Screw

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.748 inches and 0.875 inches
Fastener Length
Between 0.859 inches and 0.891 inches
Head Style
Flat chamfer
Head Diameter
Between 0.429 inches and 0.438 inches
Head Height
Between 0.306 inches and 0.313 inches
Internal Drive Style
Hexagon
Thread Diameter
0.312 inches
Width Across Flats
Between 0.218 inches and 0.222 inches
Thready Qty Per Inch (tpi)
18
Min. Tensile Strength (psi)
160000 pounds per square inch
Hardness Rating
36.0 rockwell c and 45.0 rockwell c
Material
Steel
Material Specification
Fed standard 66 federal standard single material response
Surface Treatment
Cadmium
Surface Treatment Specification
Qq-p-416, type 2 class 3 federal specification single treatment response
Thread Series Designator
Unc
Nondefinitive Specification/std Data
1 type
Departure From Cited Designator
As modified by head, 45 degv groove around surface of hd, 0.345in.Dia, 0.030in.W
NSN
5305-00-814-0113
Part Number
2491621
Description
Screw,cap,socket Head
CAGE
10001

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 2491621 NSN 5305-00-814-0113

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:
A
ESD:
ESD:
MMAC:
CRITL:
N

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: 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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