PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

999-50001-0000Washer,key

Federal Specifications Promulgated by General Services Administration Washington DC · NSN 5310-01-372-4729 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-372-4729 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-372-4729. Primary manufacturer part number: 999-50001-0000.
Features
  • Washer,key — FSC 5310
  • Outside Diameter: 0.750 INCHES NOMINAL IN
  • Hole Diameter: 0.875 INCHES NOMINAL IN
  • 2 verified cross-references
  • Primary manufacturer: Federal Specifications Promulgated by General Services Administration Washington DC
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Washer,key, cataloged under National Stock Number 5310-01-372-4729, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Federal Specifications Promulgated by General Services Administration Washington DC. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-372-4729
Primary Part Number999-50001-0000
Item NameWasher,key
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerFederal Specifications Promulgated by General Services Administration Washington DC
StatusACTIVE
Outside Diameter0.750 INCHES NOMINAL IN
Hole Diameter0.875 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5310-00-185-6486 INTERCHANGEABLE
Nut,plain,round
Cross-Reference Index
Part NumberManufacturer
999-50001-0000 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
FF-B-171 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
Related Parts
5310-00-185-6486INTERCHANGEABLE
NUT,PLAIN,ROUND

Frequently Asked Questions

What is NSN 5310-01-372-4729?

NSN 5310-01-372-4729 is a Washer,key, manufactured by Federal Specifications Promulgated by General Services Administration Washington DC, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-372-4729?

NSN 5310-01-372-4729 has 2 cross-referenced part numbers: 999-50001-0000 (Federal Specifications Promulgated by General Services Administration Washington DC), FF-B-171 (Federal Specifications Promulgated by General Services Administration Washington DC).

What NSN replaces 5310-01-372-4729?

There is 1 known substitute for 5310-01-372-4729: 5310-00-185-6486. Verify interchangeability with system specifications before substitution.

What are the specifications of 999-50001-0000?

Key specifications for 999-50001-0000: Outside Diameter: 0.750 INCHES NOMINAL IN; End Item Identification: C.I.W.S. MK15 MOD11 C.P.F.,NAVAL ORDNANCE SYSTEMS COMMAND; Hole Diameter: 0.875 INCHES NOMINAL IN. 3 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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