121A4MA

View detailed technical data, stock status, and sourcing information for: 121A4MA
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5355 Knobs and Pointers

National Stock Number

5355-00-619-3837

Item Name Code

03263

Assigment Date

01/01/1963 (63 years ago)

0.750 inches minimum counterbore diameter, 0.114 inches minimum counterbore depth, 0.252 inches minimum and 0.254 inches maximum inside diameter, 0.260 inches maximum distance from hole center to knob/skirt base, 2 setscrew hole quantity

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Inside Diameter: 0.252 inches minimum and 0.254 inches maximum
Counterbore Diameter: 0.750 inches minimum
Counterbore Depth: 0.114 inches minimum
Setscrew Hole Quantity: 2
Distance From Hole Center To Knob/Skirt Base: 0.260 inches maximum
Overall Depth: 0.455 inches minimum
Gripping Surface Condition: grip aid
Shaft Accommodation Style: counterbored
Outside Diameter: 1.240 inches minimum and 1.280 inches maximum
Attachment Method: setscrews
Overall Thickness: 0.670 inches minimum and 0.730 inches maximum
Material Transparency: opaque
Screw Drive Type: hexagon socket
Thread Quantity Per Inch: 32 screw hole
Nominal Thread Size: 0.164 inches screw hole
Color: black, lusterless
Style Designator: round
Thread Series Designator: unc screw hole

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5355-00-409-6842	No Name Available	02/01/1985
5355-00-519-6399	No Name Available	12/11/1965
5355-00-548-4855	No Name Available	03/30/1966
5355-00-667-5962	No Name Available	12/21/1965
5355-00-669-1715	No Name Available	01/17/1966
5355-00-846-2847	No Name Available	01/01/1962

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
1018963-010	Knob
121A4MA	Knob
125-1-2G	Knob
12L2R	Knob
222728-301	Knob
3N2B	Knob
480340-7	Knob
512-1-2M	Knob
KMS12N2LNR	Knob
MS91528-3N2B	Knob
MS915283N2B	Knob

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 5355-00-619-3837?

The FSCG of the NSN 5355-00-619-3837 is 5355

Does the NSN 5355-00-619-3837 have a Schedule B code assigned?

Yes, the Schedule B code is 8531900002

Does NSN 5355-00-619-3837 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 5355-00-619-3837 contain precious materials?

Item does not contain precious metal.

Does NSN 5355-00-619-3837 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 5355-00-619-3837 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963