P21818
View detailed technical data, stock status, and sourcing information for: P21818
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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.
fillister head style, 3a thread class, right-hand thread direction, 0.500 inches nominal fastener length, 0.438 inches minimum thread 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
- 3a
- Thread Direction
- right-hand
- Thread Length
- 0.438 inches minimum
- Fastener Length
- 0.500 inches nominal
- Head Style
- fillister
- Head Diameter
- 0.260 inches nominal
- Head Height
- 0.098 inches nominal
- Internal Drive Style
- slot
- Nominal Thread Diameter
- 0.164 inches
- Hole Quantity
- 2
- Thread Quantity Per Inch
- 32
- Screw Material
- steel comp 302 or steel comp 303 or steel comp 303 plus x or steel comp 303se
- Screw Material Document And Classification
- mil-s-7720 mil spec 1st material response or ams 5640 assn std 2nd material response or ams 5640 assn std 3rd material response or ams 5640 assn std 4th material response
- Screw Surface Treatment
- passivate
- Thread Series Designator
- unc
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 |
|---|---|
| P21818 | Machine Screw |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5305-00-147-2631?
Does the NSN 5305-00-147-2631 have a Schedule B code assigned?
Does NSN 5305-00-147-2631 require demilitarization?
Does NSN 5305-00-147-2631 contain precious materials?
Does NSN 5305-00-147-2631 contain hazardous materials?
When the NSN 5305-00-147-2631 was assigned to the Federal Catalog?
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