11879C4-18A
View detailed technical data, stock status, and sourcing information for: 11879C4-18A
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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. It has a round unthreaded neck or shank all or part of which is of greater diameter than the threaded portion. The head is designed to be driven with either a wrench or an inserted driver or both in sizes below no. 10 (0.190 in.) (5 mm) nominal diameter. No. 10 (0.190 in.) (5 mm) and larger sizes must be designed for any type of inserted driver, but may also provide for external wrenching of the head. A locking feature may be incorporated in the design of the head or threads. For items which are both shouldered and have an externally relieved body, use screw, externally relieved body. For items with a no. 10 (0.190 in.) (5 mm) or larger thread diameter without an inserted driver head, use bolt, shoulder. Excludes:bolt, internal wrenching and screw, cap, socket head.
3a thread class, right-hand thread direction, 1.578 inches minimum and 1.625 inches maximum fastener length, 0.443 inches minimum and 0.510 inches maximum thread length, flat countersunk undercut head 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
- 3a
- Thread Direction
- right-hand
- Thread Length
- 0.443 inches minimum and 0.510 inches maximum
- Fastener Length
- 1.578 inches minimum and 1.625 inches maximum
- Head Style
- flat countersunk undercut
- Head Diameter
- 0.502 inches minimum and 0.507 inches maximum
- Head Height
- 0.058 inches minimum and 0.060 inches maximum
- Shoulder Diameter
- 0.2802 inches minimum and 0.2807 inches maximum first shoulder
- Shoulder Length
- 1.055 inches minimum and 1.077 inches maximum first shoulder
- Internal Drive Style
- high-torque
- Nominal Thread Diameter
- 0.250 inches
- Thread Quantity Per Inch
- 28
- Countersink Angle
- 100.0 degrees nominal
- Shoulder Shape
- round first shoulder
- Special Features
- furnished with one rubber o ring
- Material
- steel comp xm-13 overall
- Material Document And Classification
- ams5629 assn std single material response overall
- Surface Treatment
- passivate overall
- Thread Series Designator
- unjf
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 |
|---|---|
| 11879C4-18A | Shoulder Screw |
| 3M902C4-18A | Shoulder Screw |
| HT4020-4-18AY | Shoulder Screw |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5305-01-142-9424?
Does the NSN 5305-01-142-9424 have a Schedule B code assigned?
Does NSN 5305-01-142-9424 require demilitarization?
Does NSN 5305-01-142-9424 contain precious materials?
Does NSN 5305-01-142-9424 contain hazardous materials?
When the NSN 5305-01-142-9424 was assigned to the Federal Catalog?
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