Model: 420988

Assembled Washer Screw

Properties:

Thread Class
2a
Thread Direction
Right-hand
Thread Length
Between 0.153 inches and 0.289 inches
Fastener Length
Between 0.281 inches and 0.312 inches
Head Style
Round
Head Diameter
Between 0.443 inches and 0.472 inches
Head Height
Between 0.160 inches and 0.175 inches
Washer Quantity
1
Internal Drive Style
Slot
Thread Diameter
0.250 inches
Thready Qty Per Inch (tpi)
20
Hardness Rating
40.0 rockwell c and 50.0 rockwell c
Primary Washer Outside Diameter
Between 0.460 inches and 0.475 inches
Primary Washer Style
Flat external teeth
Primary Washer Material Thickness
Between 0.023 inches and 0.028 inches
Material Specification
Sae assn standard all material responses
Surface Treatment
Cadmium or zinc
Surface Treatment Specification
Qq-p-416, type 1, cl 3 federal specification 1st treatment response or qq-z-325, type 1, cl 3 federal specification 2nd treatment response
Thread Series Designator
Unc
NSN
5305-00-042-0988
Part Number
420988
Description
Screw,assembled Washer
CAGE
21450

Part 420988 NSN 5305-00-042-0988

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
06660
FIIG:
A003B0
Concept No.:
App. Key:
SA
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:
50.0
WCC:
713
TCC:
Z
SHC:
9
ACC:
Construction Materials

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