Model: 445-387

Socket Head Cap Screw

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
0.750 inches
Fastener Length
0.750 inches
Head Style
Flat chamfer
Head Diameter
Between 0.367 inches and 0.375 inches
Head Height
Between 0.244 inches and 0.250 inches
Internal Drive Style
Hexagon
Thread Diameter
0.250 inches
Width Across Flats
Between 0.187 inches and 0.189 inches
Thready Qty Per Inch (tpi)
20
Hardness Rating
36.0 rockwell c and 43.0 rockwell c
Minimum Yield Strength
140000 pounds per square inch
Material
Steel comp 4037 or steel comp 4137 or steel comp 8630 or steel comp 8740
Material Specification
Qq-s-624 federal specification all material responses
Surface Treatment
Cadmium and chromate or zinc and chromate
Thread Series Designator
Unc
Nondefinitive Specification/std Data
1 type and 2 style
NSN
5305-00-042-6816
Part Number
445-387
Description
Screw,cap,socket Head
CAGE
56232

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 445-387 NSN 5305-00-042-6816

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:
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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