TR-4 1/4IN
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An item of any peripheral shape usually having one flat or spherical surface and a centrally located hole. It is designed for applications involving moving (kinetic) loads. Except for items fabricated from bearing quality synthetic (plastic) or composed of multilayer material, one bearing surface must either have a specific surface finish designation of 32 microinch (0.8 micrometre) or less, arithmetical average (aa) (arithmetic mean deviation) or one of the following conditions: be lapped or ground; have visible or detectable means of lubrication; grooves, indentations; or self-lubrication. The thickness must not exceed 25 percent of the outside diameter of the shortest distance between peripheral flats (when thickness and/or outside diameter is designated as a tolerance dimension, the maximum dimension will be used to determine compliance). Excludes:straight, tubular (without flange) items having a bearing surface(s) parallel to the axis of the bore only. See also washer, flat and spacer, sleeve.
right-hand thread direction, 0.2495 inches minimum and 0.2515 inches maximum bore diameter, 1.6870 inches nominal overall length, 2b thread class, internally threaded w/bead and wrench flats shank style
Product Characteristics
Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.
- Thread Class
- 2b
- Thread Direction
- right-hand
- Shank Style
- internally threaded w/bead and wrench flats
- Overall Length
- 1.6870 inches nominal
- Bore Diameter
- 0.2495 inches minimum and 0.2515 inches maximum
- Outer Member Outside Diameter
- 0.7400 inches minimum and 0.7600 inches maximum
- Bore Center To Shank End Distance
- 1.2800 inches minimum and 1.3440 inches maximum
- Outer Member Width
- 0.2760 inches minimum and 0.2860 inches maximum
- Inner Member Width
- 0.3700 inches minimum and 0.3750 inches maximum
- Shank Thread Length
- 0.7190 inches minimum and 0.8120 inches maximum
- Shank Width Across Wrench Flats
- 0.3650 inches minimum and 0.3850 inches maximum
- Static Radial Load Rating
- 2700 pounds
- Thread Diameter
- 0.2500 inches nominal
- Thread Quantity Per Inch
- 28
- Lubrication Feature
- groove inner member
- Material
- copper alloy race insert
- Material
- steel inner member
- Material
- steel rod end body
- Surface Treatment
- nickel and tin inner member
- Style Designator
- ball type
- 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 |
|---|---|
| TR-4 1/4IN | Rod End Plain Bearing |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 3120-01-316-1799?
Does the NSN 3120-01-316-1799 have a Schedule B code assigned?
Does NSN 3120-01-316-1799 require demilitarization?
Does NSN 3120-01-316-1799 contain precious materials?
Does NSN 3120-01-316-1799 contain hazardous materials?
When the NSN 3120-01-316-1799 was assigned to the Federal Catalog?
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