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C121B4MA Knob

5355-00-839-2546

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Official Item Classification

Name
Knob
Part Number
C121B4MA
(NSN) National Stock Number
5355-00-839-2546
(FSG) Federal Supply Group
53 Hardware and Abrasives
(FSC) Federal Supply Classification
5355 Knobs and Pointers
(INC) Item Name Code
03263
(FIIG) Federal Item Identification Guide
A530M0
Date
01/01/1962 (64 years ago)

2 setscrew hole quantity, 0.250 inches nominal inside diameter, grip aid gripping surface condition, 0.605 inches nominal overall depth, 0.427 inches maximum distance from hole center to knob/skirt base

Specs & Compatibility

Inside Diameter

0.250 inches nominal

Setscrew Hole Quantity

2

Distance From Hole Center To Knob/Skirt Base

0.427 inches maximum

Overall Depth

0.605 inches nominal

Gripping Surface Condition

grip aid

Shaft Accommodation Style

round

Outside Diameter

1.269 inches maximum

Skirt Style

stepped

Attachment Method

setscrews

Overall Thickness

1.400 inches nominal

Material Transparency

opaque

Screw Drive Type

hexagon socket

Thread Quantity Per Inch

32 screw hole

Nominal Thread Size

0.164 inches screw hole

Skirt Outside Diameter

1.185 inches maximum

Skirt Design

nondetachable

Color

black, lusterless

Material

steel corrosion resisting

Style Designator

round with bar face

Thread Series Designator

unc screw hole

Regulatory Compliance

Precious Metals Indicator
U

Precious metal content is unknown

Criticality Code
X

The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Hazardous Metals Indicator
N

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

Pseudo Item Name Code

0003263

Related Hardware Products

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C121B4MA Knob
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MS91528-3D2B3 Knob

Frequently Asked Questions

What is the FSCG of the NSN 5355-00-839-2546?
The FSCG of the NSN 5355-00-839-2546 is 5355
Does the NSN 5355-00-839-2546 have a Schedule B code assigned?
Yes, the Schedule B code is 8531900002
Does NSN 5355-00-839-2546 require demilitarization?
Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.
Does NSN 5355-00-839-2546 contain precious materials?
Precious metal content is unknown
Does NSN 5355-00-839-2546 contain hazardous materials?
Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
When the NSN 5355-00-839-2546 was assigned to the Federal Catalog?
It was assigned 64 years ago, on Mon, Jan 1, 1962