H185B4-9
View detailed technical data, stock status, and sourcing information for: H185B4-9
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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, flat countersunk head style, 0.403 inches nominal thread length, 0.9655 inches nominal fastener length, 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
- 0.403 inches nominal
- Fastener Length
- 0.9655 inches nominal
- Head Style
- flat countersunk
- Head Diameter
- 0.350 inches minimum and 0.399 inches maximum
- Head Height
- 0.063 inches nominal
- Grip Diameter
- 0.2485 inches minimum and 0.2495 inches maximum
- Point Length
- 0.045 inches nominal
- Point Style
- flat
- Internal Drive Style
- offset cruciform (torque set)
- End Item Identification
- f16
- Nominal Thread Diameter
- 0.2500 inches
- Grip Length
- 0.5625 inches nominal
- Thread Quantity Per Inch
- 28
- Minimum Tensile Strength
- 4400 pounds per square inch
- Hardness Rating
- 46.0 rockwell c minimum and 50.0 rockwell c maximum overall
- Countersink Angle
- 99.0 degrees minimum and 101.0 degrees maximum
- Point Chamfer Angle
- 45.0 degrees nominal
- Part Name Assigned By Controlling Agency
- bolt
- Special Features
- surface texture per ansi/asme b46.1, conical surface of head, shank, fillet, area and thread elements 32 rhr max. all other surfaces 125 rhr max; finish- ion vapor deposited aluminm coating per mil-c-83488 type ii class 3 with dry film lube per mil-l-46010, type i applied over aluminm coating
- Material
- steel overall
- Material Document And Classification
- ams-6487 national std single material response overall
- Surface Treatment
- aluminum overall
- Surface Treatment Document And Classification
- mil-c-83488 type ii, class 3 mil spec single treatment response overall
- Thread Series Designator
- unjf
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| PBF1166B4-9 | Close Tolerance Screw |
| SF117B4-9 | Close Tolerance Screw |
| VT1694AS4-9 | Close Tolerance Screw |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5305-01-682-0636?
Does the NSN 5305-01-682-0636 have a Schedule B code assigned?
Does NSN 5305-01-682-0636 require demilitarization?
Does NSN 5305-01-682-0636 contain precious materials?
Does NSN 5305-01-682-0636 contain hazardous materials?
When the NSN 5305-01-682-0636 was assigned to the Federal Catalog?
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