AS194-4-21
View detailed technical data, stock status, and sourcing information for: AS194-4-21
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Federal Supply Group
Hardware and Abrasives
Federal Supply Classification
5306 Bolts
National Stock Number
5306-00-408-6858
Item Name Code
27851
Assigment Date
07/10/1970 (56 years ago)
0.283 inches minimum and 0.334 inches maximum thread length, 1.731 inches minimum and 1.751 inches maximum fastener length, right-hand thread direction, dished hexagon head style, 3a thread class
Product Characteristics
Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.
- Thread Class
- 3a
- Thread Direction
- right-hand
- Thread Length
- 0.283 inches minimum and 0.334 inches maximum
- Fastener Length
- 1.731 inches minimum and 1.751 inches maximum
- Head Style
- dished hexagon
- Head Height
- 0.126 inches minimum and 0.141 inches maximum
- Width Between Flats
- 0.430 inches minimum and 0.439 inches maximum
- Grip Diameter
- 0.2483 inches minimum and 0.2492 inches maximum
- Shank Unthreaded Hole Diameter
- 0.076 inches minimum and 0.086 inches maximum first hole
- Nominal Thread Diameter
- 0.250 inches
- Grip Length
- 1.312 inches minimum and 1.328 inches maximum
- Thread Quantity Per Inch
- 28
- Hardness Rating
- 36.0 rockwell c minimum and 41.0 rockwell c maximum overall
- Distance From Head Largest Bearing Surface To Shank Hole Center
- 1.631 inches minimum and 1.661 inches maximum first hole
- Surface Finish
- 63.0 microinches bearing surface of head
- Surface Finish
- 63.0 microinches grip
- Special Features
- w/retaining element on shank
- Material
- steel overall
- Material Document And Classification
- mil-b-83050 mil spec single material response overall
- Surface Treatment
- cadmium and chromate overall
- Surface Treatment Document And Classification
- qq-p-416,ty 2,cl 2 fed spec all treatment responses overall
- Thread Series Designator
- unjf
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 |
|---|---|
| 106467-4-21 | Close Tolerance Bolt |
| AS194-4-21 | Close Tolerance Bolt |
| CA4510-4-21 | Close Tolerance Bolt |
| CIPRD-MS27576-4-21R | Close Tolerance Bolt |
| MS27576-4-21 | Close Tolerance Bolt |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5306-00-408-6858?
The FSCG of the NSN 5306-00-408-6858 is 5306
Does the NSN 5306-00-408-6858 have a Schedule B code assigned?
Yes, the Schedule B code is 7318152000
Does NSN 5306-00-408-6858 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 5306-00-408-6858 contain precious materials?
Precious metal content is unknown
Does NSN 5306-00-408-6858 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 5306-00-408-6858 was assigned to the Federal Catalog?
It was assigned 56 years ago, on Fri, Jul 10, 1970
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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.
| New Surplus | 17 |
| New Material | 180 |
| Total | 197 |
Availability of this item was last updated on:
06/03/2026 11:06 AM EDT.
Stock levels and pricing are subject to change.