Model: 91251A190

Socket Head Cap Screw

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
0.188 inches
Fastener Length
0.250 inches
Head Style
Flat chamfer
Head Diameter
Between 0.262 inches and 0.270 inches
Head Height
Between 0.159 inches and 0.164 inches
Internal Drive Style
Hexagon
Thread Diameter
0.164 inches
Width Across Flats
0.141 inches
Thready Qty Per Inch (tpi)
32
Min. Tensile Strength (psi)
180000 pounds per square inch
Hardness Rating
39.0 rockwell c and 45.0 rockwell c
Material
Steel uns k03104
Material Specification
Astm a574 assn standard single material response
Thread Series Designator
Unc
NSN
5305-01-439-8417
Part Number
91251A190
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 91251A190 NSN 5305-01-439-8417

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:
BA
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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