21751-203
View detailed technical data, stock status, and sourcing information for: 21751-203
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Federal Supply Group
Hardware and Abrasives
Federal Supply Classification
5305 Screws
National Stock Number
5305-00-453-3909
Item Name Code
06657
Assigment Date
05/08/1970 (56 years ago)
2a thread class, flat countersunk head style, 0.230 inches minimum and 0.250 inches maximum fastener length, 0.131 inches minimum and 0.201 inches maximum thread length, right-hand thread direction
Product Characteristics
Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.
- Thread Class
- 2a
- Thread Direction
- right-hand
- Thread Length
- 0.131 inches minimum and 0.201 inches maximum
- Fastener Length
- 0.230 inches minimum and 0.250 inches maximum
- Head Style
- flat countersunk
- Head Diameter
- 0.191 inches minimum and 0.206 inches maximum
- Internal Drive Style
- slot
- Nominal Thread Diameter
- 0.112 inches
- Thread Quantity Per Inch
- 40
- Countersink Angle
- 99.0 degrees minimum and 101.0 degrees maximum
- Screw Material
- steel corrosion resisting
- Screw Material Document And Classification
- bs970 en 58 series,fscm k7766 national spec single material response
- Thread Series Designator
- unc
Related Parts
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FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5305-00-453-3909?
The FSCG of the NSN 5305-00-453-3909 is 5305
Does the NSN 5305-00-453-3909 have a Schedule B code assigned?
Yes, the Schedule B code is 7318152000
Does NSN 5305-00-453-3909 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 5305-00-453-3909 contain precious materials?
Item does not contain precious metal.
Does NSN 5305-00-453-3909 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 5305-00-453-3909 was assigned to the Federal Catalog?
It was assigned 56 years ago, on Fri, May 8, 1970
Professional Distribution
Certified to meet the strict requirements of defense, aerospace, and hazardous materials distribution.
- ITAR Registered
- DDTC Registered
- HAZMAT Certified
- AS9120 Quality Standards
- 100% Quality Inspections
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Pricing
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In Stock
This item is currently available and ready for prompt shipment. Units may be offered in various conditions — new, surplus, or refurbished — and stored at verified global facilities. Request a quote to confirm current stock and delivery time.
| Overhauled | 1 |
| New Surplus | 142 |
| New Material | 827 |
| As Removed | 1 |
| Serviceable | 1 |
| Total | 972 |
Availability of this item was last updated on:
04/02/2026 12:04 PM EDT.
Stock levels and pricing are subject to change.