Model: MS21091-7018

Socket Head Cap Screw

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.631 inches and 0.697 inches
Fastener Length
Between 1.766 inches and 1.812 inches
Head Style
Flat countersunk
Head Diameter
Between 0.805 inches and 0.890 inches
Locking Feature
Patch threads or pellet threads or strip threads
Internal Drive Style
Cross recess type 1
End Application
Spec item
Thread Diameter
0.438 inches
Thready Qty Per Inch (tpi)
20
Hardness Rating
26.0 rockwell c and 32.0 rockwell c
Countersink Angle
100.0 degrees
Material
Steel comp 4037 or steel comp 8630
Material Specification
Ams 6300 assn standard 1st material response or mil-s-6050 military specification 2nd material response
Surface Treatment
Cadmium and chromate
Surface Treatment Specification
Qq-p-416, cl 3 federal specification single treatment response
Thread Series Designator
Unf
NSN
5305-01-045-9549
Part Number
MS21091-7018
Description
Screw,cap,socket Head
CAGE
96906

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 MS21091-7018 NSN 5305-01-045-9549

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:
096640
UFC:
50600
LTL:
70.0
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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