121CDMA/BL
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A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. Items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the screw thread standards, fed std h28 and/or other nationally recognized standards. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.
0.427 inches maximum distance from hole center to knob/skirt base, 0.605 inches minimum overall depth, 0.252 inches minimum and 0.254 inches maximum inside diameter, 2 setscrew hole quantity, grip aid gripping surface condition
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
- Setscrew Hole Quantity
- 2
- Distance From Hole Center To Knob/Skirt Base
- 0.427 inches maximum
- Overall Depth
- 0.605 inches minimum
- Gripping Surface Condition
- grip aid
- Shaft Accommodation Style
- flatted one side
- Outside Diameter
- 1.240 inches minimum and 1.280 inches maximum
- Skirt Style
- flared
- Reference Marking
- arrow
- Attachment Method
- setscrews
- Inside Width
- 0.222 inches minimum and 0.227 inches maximum
- Overall Thickness
- 0.820 inches minimum and 0.880 inches maximum
- Material Transparency
- clear
- Screw Drive Type
- hexagon socket
- Thread Quantity Per Inch
- 32 screw hole
- Nominal Thread Size
- 0.164 inches screw hole
- Skirt Outside Diameter
- 1.837 inches maximum
- Skirt Design
- nondetachable
- Special Features
- shaft accommodation hole counterbore,0.750 in. dia,0.250 in. depth; backlighted white arrow
- Style Designator
- round
- Thread Series Designator
- unc screw hole
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 |
|---|---|
| 121CDMA/BL | Knob |
| 125-3BLWL-2DG | Knob |
| KMS12F2DL | Knob |
| MS91528-304B | Knob |
| MS91528-3O4B | Knob |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5355-00-346-3638?
Does the NSN 5355-00-346-3638 have a Schedule B code assigned?
Does NSN 5355-00-346-3638 require demilitarization?
Does NSN 5355-00-346-3638 contain precious materials?
Does NSN 5355-00-346-3638 contain hazardous materials?
When the NSN 5355-00-346-3638 was assigned to the Federal Catalog?
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