Model: 51B4MC

Knob

Properties:

Inside Diameter
Between 0.252 inches and 0.254 inches
Counterbore Diameter
0.300 inches
Counterbore Depth
0.177 inches
Setscrew Hole Quantity
2
Distance From Hole Center To Knob/skirt Base
0.325 inches
Gripping Surface Condition
Grip aid
Outside Diameter
Between 0.490 inches and 0.530 inches
Attachment Method
Setscrews
Overall Thickness
Between 0.625 inches and 0.685 inches
Screw Drive Type
Hexagon socket
Thready Qty Per Inch (tpi)
40 screw hole
Thread Size
0.112 inches screw hole
Color
Gray, federal standard 595, 36231
Material
Plastic
Style Designator
Round
Thread Series Designator
Unc screw hole
Specification Data
96906-ms91528 government standard
NSN
5355-01-133-3957
Part Number
51B4MC
Description
Knob
CAGE
99813

An item designed to transmit manual, rotary or linear motion to other devices. May include detachable or nondetachable stud (shaft), pointer, or skirt. It may have reference markings in the form of dots, arrows, hairlines, and/or symbols which may be used in conjunction with a calibrated panel, vernier indicator, and the like to indicate the position or motion of items. For items having spokes or simulated spokes radiating from near the center to near the outside rim of the item and relatively thin round disk-shaped items 3 inches (76.2 mm) in diameter or over, see handwheel. For items calibrated in units or series of divisions to denote relative positioning of devices see dial, control. Excludes doorknob; and handle (as modified).

Part 51B4MC NSN 5355-01-133-3957

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
03263
FIIG:
A530M0
Concept No.:
App. Key:
Cond. Code:
2
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:
SX
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:
000000
UFC:
00000
LTL:
NO RATING
LCL:
--
WCC:
772
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 8531900002
  • SITC: 77885
  • End Use: Electric apparatus
  • NAICS: 335999
  • USDA: 1

Freight Class: Parts of electric sound or visual signaling apparatus other than printed circuit assemblies, nesoi

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