18243ADX
Machine Screw
This page provides complete and verified information for part number 18243ADX, NSN 5305-00-059-4550
You’ll find detailed technical specifications, product attributes, condition classification, and real-time stock availability. All data is based on official records and meets industry standards for defense, aerospace, and industrial sourcing. Whether you’re performing a parts audit, validating compliance, or preparing a purchase order, this part listing supports accurate and efficient procurement.
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.
right-hand thread direction, 0.281 inches minimum and 0.312 inches maximum fastener length, flat countersunk head style, 0.136 inches minimum and 0.229 inches maximum thread length, 2a thread class
Characteristics
Below are the official specifications and performance details for this part, including technical data, material composition, and compliance information.
- Thread Class
- 2a
- Thread Direction
- right-hand
- Thread Length
- 0.136 inches minimum and 0.229 inches maximum
- Fastener Length
- 0.281 inches minimum and 0.312 inches maximum
- Head Style
- flat countersunk
- Head Diameter
- 0.244 inches minimum and 0.279 inches maximum
- Internal Drive Style
- cross recess type 1
- End Item Identification
- w/s:radar set, firefinder (an/tpq-36); trainer, b-1b aircraft; engine, aircraft, tf-33-p-7 (c-141a/b); close in weapon system (ciws-phalanx); helicopter, mh-53e; aircraft (ac-130h, mc-130h, ec-130e, hc-130); armored security vehicle, model xm1117; missile, air intercept, sidewinder (aim-9); air compressors, high pressure
- Nominal Thread Diameter
- 0.138 inches
- Thread Quantity Per Inch
- 32
- Minimum Tensile Strength
- 60000 pounds per square inch
- Countersink Angle
- 80.0 degrees minimum and 82.0 degrees maximum
- Screw Material
- steel
- Screw Material Document And Classification
- qq-s-634 fed spec single material response or qq-s-637 fed spec single material response or 66 fed std single material response
- Screw Surface Treatment
- cadmium and chromate
- Screw Surface Treatment Document And Classification
- qq-p-416 ty 2 cl 3 fed spec all treatment responses
- Thread Series Designator
- unc
- Nondefinitive Spec/Std Data
- 3 type and 2c style
Classification Data
Detailed NSN information including identification codes, classification data, and key indicators used for cataloging, logistics, and supply management.
- Type of Item Identification
- Automatic Data Processing Point
- Demilitarization
- Criticality
- Federal Item Identification Guide
- Precious Metals Indicator
- Pseudo Item Name Code
- Hazardous Material Indicator
- Schedule B Code
- 1 - Full descriptive item identification
- 0 - Represents items with no adp components
- A - Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.
- X - The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
- A500D0
- A - Item does not contain precious metal.
- 0006657
- N - Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
- 7318152000
Freight Information
Comprehensive freight classifications, shipping codes, and handling specifications for domestic and international transport compliance.
- Major Organizational Entity
- National Motor Freight Classification Item Number
- National Motor Freight Classification Sub-Item Number
- Uniform Freight Classification Item Number
- National Motor Freight Class Rating
- Water Commodity
- Type of Cargo
- Special Hand
- Air Dimension
- Air Commodity
- National Motor Freight Description
- XX
- 133300
- Z
- 63220
- W - Rating variable
- 72E - Engineer and material handling equipment, test/tool sets and equipment
- Z - No special type of cargo code applicable
- 9 - Other or no special handling required (sh)
- A - Shipment is not a consolidation and does not exceed 84 inches in any dimension.
- VZ -
- machinery/machines noi
FAQs
Get insights on installation procedures, operating conditions, care instructions, industry regulations, and common issues. FAQs below provide key information for 18243ADX
What is the FSCG of the NSN 5305-00-059-4550?
Does the NSN 5305-00-059-4550 have a Schedule B code assigned?
Does NSN 5305-00-059-4550 require demilitarization?
Does NSN 5305-00-059-4550 contain precious materials?
Does NSN 5305-00-059-4550 contain hazardous materials?
When the NSN 5305-00-059-4550 was assigned to the Federal Catalog?
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