537904
View detailed technical data, stock status, and sourcing information for: 537904
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A thin flat metal or plastic item of various peripheral shapes having a solid or laminated cross-section. It is designed to maintain a predetermined distance between two surfaces. For round items without a hole and having a solid rectangular cross-section use disk, solid, plain. Items with either (1) a solid (not laminated) cross-section, or (2) a non-separable laminated cross-section with one hole centrally located, must have a thickness less than 0.006 inch (0.152 mm) for items less than 1/4 inch (6.35 mm) outside diameter or shortest distance across peripheral flats, and less than 0.016 inch (0.406 mm) for items 1/4 inch (6.35 mm) or more outside diameter, or shortest distance across peripheral flats. For items with thickness greater than those indicated above, see spacer, plate; washer, flat and spacer, ring. When thickness and/or outside diameter or shortest distance across peripheral flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance. See also shim stock, laminated; shim stock assortment, gasket; and bearing, washer, thrust.
right-hand thread direction, 3a thread class, 0.428 inches minimum and 0.448 inches maximum fastener length, double hexagon w/hole head style, 0.357 inches minimum and 0.377 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
- 0.357 inches minimum and 0.377 inches maximum
- Fastener Length
- 0.428 inches minimum and 0.448 inches maximum
- Head Style
- double hexagon w/hole
- Head Height
- 0.320 inches minimum and 0.340 inches maximum
- Width Between Flats
- 0.304 inches minimum and 0.313 inches maximum
- Extended Washer Diameter
- 0.428 inches minimum and 0.448 inches maximum
- Extended Washer Thickness
- 0.060 inches minimum and 0.070 inches maximum
- Hole Diameter
- 0.070 inches nominal
- Nominal Thread Diameter
- 0.250 inches
- Hole Quantity
- 4
- Hole Type
- drilled
- Features Provided
- finished head
- Thread Quantity Per Inch
- 28
- Hardness Rating
- 26.0 rockwell c minimum and 32.0 rockwell c maximum overall
- Hole Configuration Style
- double hexagon longitudinal hole
- Material
- steel comp 8740 overall
- Material Document And Classification
- ams 6322 assn std single material response overall
- Surface Treatment
- cadmium overall
- Surface Treatment Document And Classification
- ams 2400 assn std single treatment response overall
- Thread Series Designator
- unf
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 |
|---|---|
| 537904 | Machine Bolt |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5306-00-852-0881?
Does the NSN 5306-00-852-0881 have a Schedule B code assigned?
Does NSN 5306-00-852-0881 require demilitarization?
Does NSN 5306-00-852-0881 contain precious materials?
Does NSN 5306-00-852-0881 contain hazardous materials?
When the NSN 5306-00-852-0881 was assigned to the Federal Catalog?
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