PBF1079-4-9
View detailed technical data, stock status, and sourcing information for: PBF1079-4-9
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A high strength, 160,000 pounds per square inch (1100 megapascals) minimum tensile strength externally threaded fastener designed for use in applications involving great shear stress. The head is designed to accommodate an external wrench or driver. The head is not designed to be held or driven with an inserted driver, nor is it designed for rotation by the thumb and fingers. The unthreaded portion is of specific grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a specific diameter for items one inch (25 mm) or less in diameter. Items over one inch (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015) of an inch (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001) of an inch (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the screw thread standards, fed std h28 and/or other nationally recognized standards. A locking feature may be incorporated in the design of the head or threads. See bolt, machine and bolt, clevis.
0.387 inches minimum and 0.437 inches maximum thread length, double hexagon w/hole head style, 3a thread class, 0.959 inches minimum and 0.989 inches maximum fastener length, 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
- 0.387 inches minimum and 0.437 inches maximum
- Fastener Length
- 0.959 inches minimum and 0.989 inches maximum
- Head Style
- double hexagon w/hole
- Head Height
- 0.290 inches minimum and 0.310 inches maximum
- Width Between Flats
- 0.304 inches minimum and 0.313 inches maximum
- Extended Washer Diameter
- 0.428 inches minimum and 0.438 inches maximum
- Extended Washer Thickness
- 0.069 inches nominal
- Grip Diameter
- 0.2485 inches minimum and 0.2495 inches maximum
- Nominal Thread Diameter
- 0.250 inches
- Grip Length
- 0.552 inches minimum and 0.572 inches maximum
- Thread Quantity Per Inch
- 28
- Minimum Tensile Strength
- 220000 pounds per square inch
- Hardness Rating
- 46.0 rockwell c minimum and 50.0 rockwell c maximum overall
- Surface Finish
- 32.0 microinches bearing surface of head
- Surface Finish
- 32.0 microinches grip
- Part Name Assigned By Controlling Agency
- navy special project
- Material
- steel comp h11 overall
- Material Document And Classification
- ams 6487 assn std single material response overall
- Surface Treatment
- cadmium or cadmium and chromate overall
- Surface Treatment Document And Classification
- nas 672 assn std 1st treatment response or mil-c-8837 type 2 class 2 mil spec 2nd treatment response overall
- Thread Series Designator
- unjf
Replaces National Stock Numbers
Below is a list of NSNs that have been officially superseded by this NSN:
| NSN | Name | Date |
|---|---|---|
| 5306-00-038-8672 | No Name Available | 02/01/2004 |
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| Part Number | Name |
|---|---|
| AIC515-4-9 | Shear Bolt |
| BM3315-4-9 | Shear Bolt |
| GB511GF4-9 | Shear Bolt |
| GB511W4-9 | Shear Bolt |
| H381-4-9 | Shear Bolt |
| LWB22D-4-9 | Shear Bolt |
| PBF1079-4-9 | Shear Bolt |
| VEP220121-4V9 | Shear Bolt |
| VS3070F4-9 | Shear Bolt |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5306-01-132-4356?
Does the NSN 5306-01-132-4356 have a Schedule B code assigned?
Does NSN 5306-01-132-4356 require demilitarization?
Does NSN 5306-01-132-4356 contain precious materials?
Does NSN 5306-01-132-4356 contain hazardous materials?
When the NSN 5306-01-132-4356 was assigned to the Federal Catalog?
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