2-56-2RBT
View detailed technical data, stock status, and sourcing information for: 2-56-2RBT
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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.
0.094 inches minimum and 0.125 inches maximum fastener length, 2a thread class, 0.089 inches minimum and 0.125 inches maximum thread length, pan head style, 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
- 2a
- Thread Direction
- right-hand
- Thread Length
- 0.089 inches minimum and 0.125 inches maximum
- Fastener Length
- 0.094 inches minimum and 0.125 inches maximum
- Head Style
- pan
- Head Diameter
- 0.155 inches minimum and 0.167 inches maximum
- Head Height
- 0.053 inches minimum and 0.062 inches maximum
- Internal Drive Style
- cross recess type 1
- End Item Identification
- w/s:helicopter, iroquois uh-1; fms-knox class ff; helicopter, advance attack, ah-1w; consolidated targets; fms-lst 511-1152 class; an/trn-30 beacon set radio; wasp class lhd; f4s aircraft; tarawa class lha; nimitz class cvn
- Nominal Thread Diameter
- 0.086 inches
- Thread Quantity Per Inch
- 56
- 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Below is a list of NSNs that have been officially superseded by this NSN: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 |
|---|---|---|
| 5305-00-054-4324 | No Name Available | 04/23/1969 |
| 5305-00-141-4383 | No Name Available | 09/01/1977 |
| 5305-00-149-9860 | No Name Available | 02/08/2017 |
| 5305-00-150-9802 | No Name Available | 01/18/1967 |
| 5305-00-285-2574 | Machine Screw | 07/01/2025 |
| 5305-00-286-3649 | No Name Available | 10/01/1982 |
| 5305-00-290-3002 | No Name Available | 10/01/1982 |
| 5305-00-550-4274 | No Name Available | 05/02/2001 |
| 5305-00-571-2404 | No Name Available | 07/15/1968 |
| 5305-00-584-7186 | No Name Available | 12/01/1982 |
| 5305-00-655-9383 | No Name Available | 02/17/1967 |
| 5305-00-838-6728 | No Name Available | 03/05/1971 |
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 |
|---|---|
| 15200 BLK.OXIDE | Machine Screw |
| 15200 BLK.OXIDEADX | Machine Screw |
| 2-56-2RBT | Machine Screw |
| 343-0297-00 | Machine Screw |
| 343-0297-000 | Machine Screw |
| AN515B2-2 | Machine Screw |
| AN515UB2-2 | Machine Screw |
| MS35214-1 | Machine Screw |
| P343-0297-00 | Machine Screw |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5305-00-059-8226?
Does the NSN 5305-00-059-8226 have a Schedule B code assigned?
Does NSN 5305-00-059-8226 require demilitarization?
Does NSN 5305-00-059-8226 contain precious materials?
Does NSN 5305-00-059-8226 contain hazardous materials?
When the NSN 5305-00-059-8226 was assigned to the Federal Catalog?
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