Model: NK503-8-8M

Socket Head Cap Screw

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.407 inches and 0.500 inches
Fastener Length
Between 0.469 inches and 0.500 inches
Head Style
Fillister
Head Diameter
Between 0.250 inches and 0.270 inches
Head Height
Between 0.106 inches and 0.113 inches
Locking Feature
Pellet threads
Internal Drive Style
Slot
Thread Diameter
0.164 inches
Thready Qty Per Inch (tpi)
32
Surface Finish
32.0 microinches bearing surface of head
Surface Finish
32.0 microinches threads
Part Name Assigned By Controlling Agency
Navy special project
Material
Iron alloy 660
Material Specification
Ams5737 assn standard single material response
Surface Treatment
Passivate
Surface Treatment Specification
Qq-p-35 federal specification single treatment response
Thread Series Designator
Unc
NSN
5305-01-234-3073
Part Number
NK503-8-8M
Description
Screw,cap,socket Head
CAGE
26233

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 NK503-8-8M NSN 5305-01-234-3073

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:
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
096640
UFC:
50600
LTL:
70.0
LCL:
--
WCC:
713
TCC:
Z
SHC:
9
ACC:
Trailers/Vehicles

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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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