5178639
Keyway Washer
This page provides complete and verified information for part number 5178639, NSN 5310-00-517-8639
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.
A cylindrical, externally threaded item having a centrally located hole specifically designed to retain by means of either a raised box (shoulder), or counterbore, countersink, or a similar shaped recess, an optical element such as a lens, reticle, cell, and the like, in optical assemblies. It must have drilled holes or slots to facilitate assembly and disassembly. For items which house the optical element(s), and form the internal or central portions of an optical system, see cell, optical element. Excludes:ring, externally threaded.
0.078 inches nominal external keyway length, 1 external keyway quantity, 0.093 inches nominal external keyway width, 0.343 inches nominal hole diameter, 0.578 inches nominal outside diameter
Characteristics
Below are the official specifications and performance details for this part, including technical data, material composition, and compliance information.
- Hole Diameter
- 0.343 inches nominal
- Outside Diameter
- 0.578 inches nominal
- External Keyway Length
- 0.078 inches nominal
- External Keyway Width
- 0.093 inches nominal
- External Keyway Quantity
- 1
- Material Thickness
- 0.015 inches nominal
- Material
- paper overall
Classification Data
Detailed NSN information including identification codes, classification data, and key indicators used for cataloging, logistics, and supply management.
- Type of Item Identification
- Demilitarization
- Criticality
- Federal Item Identification Guide
- Precious Metals Indicator
- Pseudo Item Name Code
- Hazardous Material Indicator
- Schedule B Code
- 4 - Partial descriptive item identification (type 1 concept)
- 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.
- A022B0
- U - Precious metal content is unknown
- 0006158
- N - Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
- 4823908850
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
- 194120
- Z
- 95100
- W - Rating variable
- 573 - Bolts or nuts (iron or steel),(less than 35 feet)
- 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.
- BZ -
- washers/gaskets/pckg dvcs noi
FAQs
Get insights on installation procedures, operating conditions, care instructions, industry regulations, and common issues. FAQs below provide key information for 5178639
What is the FSCG of the NSN 5310-00-517-8639?
Does the NSN 5310-00-517-8639 have a Schedule B code assigned?
Does NSN 5310-00-517-8639 require demilitarization?
Does NSN 5310-00-517-8639 contain precious materials?
Does NSN 5310-00-517-8639 contain hazardous materials?
When the NSN 5310-00-517-8639 was assigned to the Federal Catalog?
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Price & Availability
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Ready to Ship
This item is in stock and ready to ship. Available units may vary in condition (new, surplus, refurbished) and are stored across multiple verified facilities. Request a quote to confirm quantity and lead time.
| New Material | 22 |
| Total | 22 |
