171-21
Knob
This page provides complete and verified information for part number 171-21, NSN 5355-00-404-4813
You’ll find detailed technical specifications, product attributes, condition classification, and real-time stock availability. All data is based on official records and meets industry standards for defense, aerospace, and industrial sourcing. Whether you’re performing a parts audit, validating compliance, or preparing a purchase order, this part listing supports accurate and efficient procurement.
0.250 inches nominal inside diameter, 0.281 inches nominal distance from hole center to knob/skirt base, 0.500 inches nominal overall depth, 0.812 inches nominal width, 1 setscrew hole quantity
Characteristics
Below are the official specifications and performance details for this part, including technical data, material composition, and compliance information.
- Inside Diameter
- 0.250 inches nominal
- Setscrew Hole Quantity
- 1
- Distance From Hole Center To Knob/Skirt Base
- 0.281 inches nominal
- Overall Depth
- 0.500 inches nominal
- Width
- 0.812 inches nominal
- Fluted Foil Quantity
- 7
- Gripping Surface Condition
- smooth
- Shaft Accommodation Style
- round
- Skirt Style
- flared
- Attachment Method
- setscrews
- Overall Thickness
- 0.594 inches nominal
- Screw Drive Type
- cross recess type 1
- Thread Quantity Per Inch
- 32 screw hole
- Nominal Thread Size
- 0.164 inches screw hole
- Skirt Outside Diameter
- 1.000 inches nominal
- Skirt Design
- nondetachable
- Style Designator
- fluted foils
- Thread Series Designator
- unc screw hole
Classification Data
Detailed NSN information including identification codes, classification data, and key indicators used for cataloging, logistics, and supply management.
- Type of Item Identification
- Demilitarization
- Criticality
- Federal Item Identification Guide
- Precious Metals Indicator
- Pseudo Item Name Code
- Hazardous Material Indicator
- Schedule B Code
- M - Partial descriptive - reference item identification (type 1a concept)
- A - 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.
- X - The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
- A530M0
- U - Precious metal content is unknown
- 0003263
- N - Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
- 8531900002
Freight Information
Comprehensive freight classifications, shipping codes, and handling specifications for domestic and international transport compliance.
- Major Organizational Entity
- GX
FAQs
Get insights on installation procedures, operating conditions, care instructions, industry regulations, and common issues. FAQs below provide key information for 171-21
What is the FSCG of the NSN 5355-00-404-4813?
Does the NSN 5355-00-404-4813 have a Schedule B code assigned?
Does NSN 5355-00-404-4813 require demilitarization?
Does NSN 5355-00-404-4813 contain precious materials?
Does NSN 5355-00-404-4813 contain hazardous materials?
When the NSN 5355-00-404-4813 was assigned to the Federal Catalog?
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Price & Availability
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