ST3M840-4-8
View detailed technical data, stock status, and sourcing information for: ST3M840-4-8
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An externally threaded fastener whose threaded portion is of one nominal diameter, no. 10 (0.190 in.) (5 mm) or larger. It has a round unthreaded neck or shank all or part of which is of greater diameter than the threaded portion. The head is not designed to be held or driven with an inserted drivers. A locking feature may be incorporated in the design of the head or threads. For items with a thread diameter smaller than no. 10 (0.190 in.) (5 mm) and those items with an inserted drive head, use screw, shoulder. For items which are no. 10 (0.190 in.) (5 mm) or larger in size and are both shouldered and have an externally relieved body, use bolt, externally relieved body. Excludes:thumbscrew.
3a thread class, right-hand thread direction, spline extended washer head style, 0.953 inches minimum and 0.983 inches maximum fastener length, 0.443 inches minimum and 0.493 inches maximum thread length
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
- 0.443 inches minimum and 0.493 inches maximum
- Fastener Length
- 0.953 inches minimum and 0.983 inches maximum
- Head Style
- spline extended washer
- Head Height
- 0.240 inches minimum and 0.260 inches maximum
- Width Between Flats
- 0.318 inches minimum and 0.324 inches maximum
- Extended Washer Diameter
- 0.460 inches minimum and 0.470 inches maximum
- Extended Washer Thickness
- 0.026 inches minimum and 0.046 inches maximum
- Shoulder Diameter
- 0.2802 inches minimum and 0.2807 inches maximum first shoulder
- Shoulder Length
- 0.490 inches minimum and 0.510 inches maximum first shoulder
- Nominal Thread Diameter
- 0.250 inches
- Thread Quantity Per Inch
- 28
- Minimum Tensile Strength
- 220000 pounds per square inch
- Shoulder Shape
- round first shoulder
- Material
- steel comp xm-13 overall
- Material Document And Classification
- ams5629 assn std single material response overall
- Surface Treatment
- passivate overall
- Surface Treatment Document And Classification
- qq-p-35 fed spec single treatment response 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 |
|---|---|
| 122916-4-8 | Shoulder Bolt |
| MB162-4-8 | Shoulder Bolt |
| ST3M840-4-8 | Shoulder Bolt |
| VS3190-4-8Y | Shoulder Bolt |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5306-01-142-9362?
Does the NSN 5306-01-142-9362 have a Schedule B code assigned?
Does NSN 5306-01-142-9362 require demilitarization?
Does NSN 5306-01-142-9362 contain precious materials?
Does NSN 5306-01-142-9362 contain hazardous materials?
When the NSN 5306-01-142-9362 was assigned to the Federal Catalog?
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