Model: GS550E3S20

Socket Head Cap Screw

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.548 inches and 0.640 inches
Fastener Length
Between 1.219 inches and 1.281 inches
Head Style
Round extended washer
Head Diameter
0.375 inches
Head Height
Between 0.089 inches and 0.099 inches
Extended Washer Diameter
0.437 inches
Extended Washer Thickness
Between 0.025 inches and 0.030 inches
Locking Feature
Pellet threads or strip threads
Locking Feature
Pellet or strip threads
Internal Drive Style
Slot
Thread Diameter
0.190 inches
Thready Qty Per Inch (tpi)
32
Min. Tensile Strength (psi)
125000 pounds per square inch
Part Name Assigned By Controlling Agency
Navy special project
Material
Steel comp 4037 or steel comp 8630
Material
Steel comp 4037 or steel comp 8630
Material Specification
Mil-s-8695 military specification 1st material response or mil-s-6050 military specification 2nd material response
Material Specification
Mil-s-8695 military specification 1st material response or mil-s-6050 military specification 2nd material response
Surface Treatment
Cadmium or zinc
Surface Treatment
Cadmium or zinc
Surface Treatment Specification
An-p-61 military standard 1st treatment response or qq-z-325 federal specification 2nd treatment response
Surface Treatment Specification
An-p-61 military standard 1st treatment response or qq-z-325 federal specification 2nd treatment response
Thread Series Designator
Unf
NSN
5305-00-144-8290
Part Number
GS550E3S20
Description
Screw,cap,socket Head
CAGE
26512

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 GS550E3S20 NSN 5305-00-144-8290

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

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
093486
UFC:
48950
LTL:
RATING VARIABLE
LCL:
--
WCC:
713
TCC:
Z
SHC:
9
ACC:
Construction Materials

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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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