128631-004
View detailed technical data, stock status, and sourcing information for: 128631-004
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An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below no. 10 (0.190 in./5 mm). No. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. Excludes:bolt, clevis; bolt, externally relieved body; screw, externally relieved body; and screw, assembled washer. See also, screw, instrument; bolt, machine; bolt, internal wrenching; and screw, cap socket head.
pan head style, right-hand thread direction, 2a thread class, 0.250 inches minimum and 0.312 inches maximum thread length, 0.312 inches nominal fastener 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
- 2a
- Thread Direction
- right-hand
- Thread Length
- 0.250 inches minimum and 0.312 inches maximum
- Fastener Length
- 0.312 inches nominal
- Head Style
- pan
- Head Diameter
- 0.256 inches minimum and 0.270 inches maximum
- Head Height
- 0.087 inches minimum and 0.097 inches maximum
- Internal Drive Style
- cross recess type 1
- Nominal Thread Diameter
- 0.138 inches
- Thread Quantity Per Inch
- 32
- Minimum Tensile Strength
- 57000 pounds per square inch
- Screw Material
- copper alloy
- Screw Material Document And Classification
- qq-b-626 fed spec single material response or qq-w-321 fed spec single material response
- Thread Series Designator
- unc
Replaces National Stock Numbers
Below is a list of NSNs that have been officially superseded by this NSN:
| NSN | Name | Date |
|---|---|---|
| 5305-00-011-5574 | No Name Available | 12/01/1979 |
| 5305-00-012-0093 | No Name Available | 09/01/1983 |
| 5305-00-095-9471 | No Name Available | 10/24/1969 |
| 5305-00-206-3714 | No Name Available | 01/01/1963 |
| 5305-00-274-0876 | No Name Available | 12/01/1982 |
| 5305-00-282-4080 | No Name Available | 06/24/1979 |
| 5305-00-283-0255 | No Name Available | 09/01/1982 |
| 5305-00-290-3013 | Machine Screw | 07/01/2025 |
| 5305-00-407-8737 | No Name Available | 08/18/1997 |
| 5305-00-576-6405 | No Name Available | 08/26/2013 |
| 5305-00-576-7680 | No Name Available | 11/01/1982 |
| 5305-00-655-6771 | No Name Available | 09/24/1996 |
| 5305-00-761-0480 | No Name Available | 11/01/1998 |
| 5305-00-832-4061 | No Name Available | 11/03/2016 |
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| MS35214-24 | Machine Screw |
| MS35314-24 | Machine Screw |
| P343-0329-00 | Machine Screw |
| P343-0329-000 | Machine Screw |
| P343-1772-000 | Machine Screw |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5305-00-059-8249?
Does the NSN 5305-00-059-8249 have a Schedule B code assigned?
Does NSN 5305-00-059-8249 require demilitarization?
Does NSN 5305-00-059-8249 contain precious materials?
Does NSN 5305-00-059-8249 contain hazardous materials?
When the NSN 5305-00-059-8249 was assigned to the Federal Catalog?
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