4176204-1/4
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An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes:items with bevel (conical) heads. See bolt, internal wrenching. Excludes:screw, shoulder; and screw, machine.
right-hand thread direction, 1.590 inches minimum and 1.750 inches maximum thread length, 3a thread class, 1.690 inches minimum and 1.750 inches maximum fastener length, flat chamfer head style
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
- 1.590 inches minimum and 1.750 inches maximum
- Fastener Length
- 1.690 inches minimum and 1.750 inches maximum
- Head Style
- flat chamfer
- Head Diameter
- 0.642 inches minimum and 0.656 inches maximum
- Head Height
- 0.430 inches minimum and 0.437 inches maximum
- Hole Diameter
- 0.061 inches minimum and 0.067 inches maximum
- Internal Drive Style
- hexagon
- Nominal Thread Diameter
- 0.438 inches
- Width Across Flats
- 0.375 inches minimum and 0.379 inches maximum
- Hole Quantity
- 6
- Hole Type
- drilled
- Thread Quantity Per Inch
- 20
- Minimum Tensile Strength
- 170000 pounds per square inch
- Hardness Rating
- 38.0 rockwell c minimum and 45.0 rockwell c maximum overall
- Minimum Yield Strength
- 150000 pounds per square inch
- Hole Configuration Style
- round internal hexagon
- Material
- steel comp 302 or steel comp 303 or steel comp 303se or steel comp 304 or steel comp 304l or steel comp 305 or steel comp 309 or steel comp 310 or steel comp 316 or steel comp 316l or steel comp 317 or steel comp 321 or steel comp 322 or steel comp 324 or steel comp 347 overall
- Material Document And Classification
- 66 fed std all material responses overall
- Surface Treatment
- cadmium and chromate overall
- Surface Treatment Document And Classification
- qq-p-416,ty2,cl2 fed spec single treatment response overall
- Thread Series Designator
- unrf
- Specification/Standard Data
- 80205-nas1351 professional/industrial association standard
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 |
|---|---|
| 4176204-1/4 | Socket Head Cap Screw |
| NAS1351-7H28P | Socket Head Cap Screw |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5305-01-203-6440?
Does the NSN 5305-01-203-6440 have a Schedule B code assigned?
Does NSN 5305-01-203-6440 require demilitarization?
Does NSN 5305-01-203-6440 contain precious materials?
Does NSN 5305-01-203-6440 contain hazardous materials?
When the NSN 5305-01-203-6440 was assigned to the Federal Catalog?
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