Model: 91255A578

Socket Head Cap Screw

Properties:

Thread Class
5
Thread Direction
Right-hand
Thread Length
0.500 inches
Fastener Length
0.666 inches
Head Style
Pan
Head Diameter
0.547 inches
Head Height
0.166 inches
Internal Drive Style
Hexagon
Thread Diameter
0.312 inches
Width Across Flats
0.188 inches
Thready Qty Per Inch (tpi)
18
Material
Steel
Thread Series Designator
Unf
NSN
5305-01-599-9601
Part Number
91255A578
Description
Screw,cap,socket Head
CAGE

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 91255A578 NSN 5305-01-599-9601

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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