LL3-3A
View detailed technical data, stock status, and sourcing information for: LL3-3A
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An externally threaded fastener designed for insertion through holes in assembled parts and normally intended to be tightened or released by torquing a nut. The threaded and unthreaded portions are both of one nominal diameter of 0.190 inch (5 mm) or larger. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. For items having a grip length portion machined to a tolerance of 0.0015 inch (0.038 mm) or less, bolt, shear. See also screw, cap, hexagon head and screw, machine.
hexagon head style, 0.375 inches minimum and 0.454 inches maximum thread length, 0.453 inches minimum and 0.500 inches maximum fastener length, 3a thread class, 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
- 3a
- Thread Direction
- right-hand
- Thread Length
- 0.375 inches minimum and 0.454 inches maximum
- Fastener Length
- 0.453 inches minimum and 0.500 inches maximum
- Head Style
- hexagon
- Head Height
- 0.109 inches minimum and 0.141 inches maximum
- Width Between Flats
- 0.365 inches minimum and 0.377 inches maximum
- Nominal Thread Diameter
- 0.190 inches
- Grip Length
- 0.046 inches minimum and 0.078 inches maximum
- Features Provided
- finished head
- Thread Quantity Per Inch
- 32
- Minimum Tensile Strength
- 125000 pounds per square inch
- Hardness Rating
- 26.0 rockwell c minimum and 32.0 rockwell c maximum overall
- Material
- steel comp 4037 or steel comp 4130 or steel comp 8630 or steel comp 8735 or steel comp 8740 or steel comp 4140 overall
- Material Document And Classification
- mil-b-6812 mil spec all material responses overall
- Surface Treatment
- cadmium and chromate overall
- Surface Treatment Document And Classification
- qq-p-416,ty 2,cl 3 fed spec all treatment responses overall
- Thread Series Designator
- unf
Replaces National Stock Numbers
Below is a list of NSNs that have been officially superseded by this NSN:
| NSN | Name | Date |
|---|---|---|
| 5306-00-870-5270 | No Name Available | 07/01/1992 |
| 5306-00-902-8060 | No Name Available | 06/01/1986 |
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 |
|---|---|
| LL3-3A | Machine Bolt |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5306-00-118-6381?
Does the NSN 5306-00-118-6381 have a Schedule B code assigned?
Does NSN 5306-00-118-6381 require demilitarization?
Does NSN 5306-00-118-6381 contain precious materials?
Does NSN 5306-00-118-6381 contain hazardous materials?
When the NSN 5306-00-118-6381 was assigned to the Federal Catalog?
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