Model: 420991

Assembled Washer Screw

Properties:

Thread Class
2a
Thread Direction
Right-hand
Thread Length
Between 0.369 inches and 0.469 inches
Fastener Length
Between 0.469 inches and 0.500 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
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
Steel comp 1050 primary washer
Material
Steel fastener
Material Specification
66, 1010-1020 federal standard single material response fastener
Material Specification
Sae assn standard single material response primary washer
Surface Treatment
Cadmium fastener
Surface Treatment
Zinc primary washer
Surface Treatment Specification
Qq-p-416, type 1, cl 3 federal specification single treatment response fastener
Surface Treatment Specification
Qq-z-325, type 1, cl 3 federal specification single treatment response primary washer
Thread Series Designator
Unc
NSN
5305-00-042-0991
Part Number
420991
Description
Screw,assembled Washer
CAGE
21450

A screw, (as modified) to which has been assembled one or more nonremovable washer(s).

Part 420991 NSN 5305-00-042-0991

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:
SX
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
1.1000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
E
LVL_B:
Q

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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