Model: 91251A378

Socket Head Cap Screw

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
0.500 inches
Fastener Length
0.500 inches
Head Style
Flat fillister
Head Diameter
0.469 inches
Head Height
0.312 inches
Internal Drive Style
Hexagon
End Application
F-15sa
Thread Diameter
0.3125 inches
Width Across Flats
0.250 inches
Thready Qty Per Inch (tpi)
24
Min. Tensile Strength (psi)
170000 pounds per square inch
Hardness Rating
37.0 rockwell c
Part Name Assigned By Controlling Agency
Alloy steel socket head cap screw
Color
Black
Material
Steel comp 631
Surface Treatment
Oxide
Thread Series Designator
Unf
NSN
5305-01-644-5162
Part Number
91251A378
Description
Screw,cap,socket Head
CAGE
39428

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 91251A378 NSN 5305-01-644-5162

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:
A
ESD:
A
MMAC:
CRITL:
X

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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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