Model: B4013388-2

Panel Screw Assembly

Properties:

Thread Class
2a
Thread Direction
Right-hand
Thread Length
0.250 inches
Fastener Length
0.852 inches
Head Style
Hexagon
Head Height
Between 0.172 inches and 0.190 inches
Width Between Flats
Between 0.428 inches and 0.438 inches
Internal Drive Style
Slot
Material Accommodated Thickness
Between 0.318 inches and 0.332 inches
Thread Diameter
0.250 inches
Thready Qty Per Inch (tpi)
20
Material
Aluminum alloy 6061 stand-off
Material
Iron alloy 660 fastener
Material
Steel comp 301 or steel comp 302 or steel comp 304 or steel comp 316 secondary washer
Material
Steel comp 302 primary washer
Material Specification
Ams5732 assn standard single material response fastener
Material Specification
Mil-s-5059 military specification all material responses secondary washer
Material Specification
Qq-a-225/8 federal specification single material response stand-off
Surface Treatment
Anodize stand-off
Surface Treatment
Passivate fastener
Surface Treatment
Passivate primary washer
Surface Treatment
Passivate secondary washer
Surface Treatment Specification
Mil-a-8625, type1, class 1 military specification single treatment response stand-off
Surface Treatment Specification
Qq-p-35 federal specification single treatment response fastener
Surface Treatment Specification
Qq-p-35 federal specification single treatment response primary washer
Surface Treatment Specification
Qq-p-35 federal specification single treatment response secondary washer
Thread Series Designator
Unf
NSN
5305-01-221-3503
Part Number
B4013388-2
Description
Screw Assembly,panel
CAGE
56996

A headed, threaded fastening device over which may be assembled; (1) a stand-off; (2) a flanged bushing with washer(s) and/or a shouldered bushing without a flange, or it may have an internally threaded sleeve that is an integral part of the screw; a washer and an externally thread self-locking bushing that is driven by an inserted driver. Attached to panel by threaded bushing or by flaring end of stand-off, or bushing. Used in conjunction with a speed nut, nut plate, or driven into a threaded hole in the item that the panel is fastened to. May be spring loaded.

Part B4013388-2 NSN 5305-01-221-3503

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
33044
FIIG:
A003B0
Concept No.:
App. Key:
SU
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

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
--
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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