Model: 16991-92-C-3-BUNBRAKO

Socket Head Cap Screw

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.178 inches and 0.198 inches
Fastener Length
Between 0.178 inches and 0.198 inches
Head Style
Roof
Head Diameter
Between 0.187 inches and 0.207 inches
Head Height
Between 0.054 inches and 0.074 inches
Internal Drive Style
Hexagon
Thread Diameter
0.086 inches
Width Across Flats
Between 0.040 inches and 0.060 inches
Thready Qty Per Inch (tpi)
56
Hardness Rating
36.0 rockwell c and 45.0 rockwell c
Countersink Angle
Between 80.0 degrees and 82.0 degrees
Material
Steel
Surface Treatment
Passivate
Surface Treatment Specification
Qq-p-35 federal specification single treatment response
Thread Series Designator
Unc
NSN
5305-01-256-5790
Part Number
16991-92-C-3-BUNBRAKO
Description
Screw,cap,socket Head
CAGE
56878

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 16991-92-C-3-BUNBRAKO NSN 5305-01-256-5790

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

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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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