51C4MA

View detailed technical data, stock status, and sourcing information for: 51C4MA
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5355 Knobs and Pointers

National Stock Number

5355-00-838-6978

Item Name Code

03263

Assigment Date

12/14/1966 (59 years ago)

0.325 inches maximum distance from hole center to knob/skirt base, 0.177 inches minimum counterbore depth, 0.252 inches minimum and 0.254 inches maximum inside diameter, 2 setscrew hole quantity, 0.300 inches minimum counterbore diameter

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: 0.300 inches minimum
Counterbore Depth: 0.177 inches minimum
Setscrew Hole Quantity: 2
Distance From Hole Center To Knob/Skirt Base: 0.325 inches maximum
Overall Depth: 0.560 inches minimum
Gripping Surface Condition: grip aid
Shaft Accommodation Style: counterbored
Outside Diameter: 0.490 inches minimum and 0.530 inches maximum
Skirt Style: flared
Reference Marking: arrow
Attachment Method: setscrews
Overall Thickness: 0.625 inches minimum and 0.685 inches maximum
Screw Drive Type: hexagon socket
Thread Quantity Per Inch: 40 screw hole
Nominal Thread Size: 0.112 inches screw hole
Skirt Outside Diameter: 0.900 inches maximum
Skirt Design: nondetachable
Color: black
Style Designator: round
Thread Series Designator: unc screw hole
Specification/Standard Data: 96906-ms91528 government standard

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5355-00-146-7410	No Name Available	11/09/2007
5355-00-508-0191	No Name Available	08/01/1985
5355-00-835-6409	No Name Available	12/01/1999
5355-00-905-3750	No Name Available	07/01/1986
5355-01-131-2985	No Name Available	03/01/1995
5355-01-165-7645	No Name Available	07/01/1992

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
0F2B	Knob
222730-003	Knob
505-3WA-2M	Knob
51C4MA	Knob
MS91528-0F2B	Knob
SS70PL2	Knob

FAQs

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

What is the FSCG of the NSN 5355-00-838-6978?

The FSCG of the NSN 5355-00-838-6978 is 5355

Does the NSN 5355-00-838-6978 have a Schedule B code assigned?

Yes, the Schedule B code is 8531900002

Does NSN 5355-00-838-6978 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 5355-00-838-6978 contain precious materials?

Item does not contain precious metal.

Does NSN 5355-00-838-6978 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 5355-00-838-6978 was assigned to the Federal Catalog?

It was assigned 59 years ago, on Wed, Dec 14, 1966