PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

11618Washer,flat

Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney · NSN 5310-00-216-3116 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-216-3116 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-216-3116. Primary manufacturer part number: 11618.
Features
  • Washer,flat — FSC 5310
  • Center Hole Shape Style: ROUND
  • Material: STEEL OVERALL
  • Peripheral Shape Style: ROUND
  • Cross-Sectional Shape Style: RECTANGULAR
  • Surface Treatment: CADMIUM OVERALL
  • Overall Diameter: 0.375 INCHES NOMINAL IN
  • Thickness: 0.031 INCHES NOMINAL IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-00-216-3116, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-216-3116
Primary Part Number11618
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerRtx Corporation Dba Pratt & Whitney Div Pratt &whitney
StatusACTIVE
Center Hole Shape StyleROUND
MaterialSTEEL OVERALL
Peripheral Shape StyleROUND
Cross-Sectional Shape StyleRECTANGULAR
Surface TreatmentCADMIUM OVERALL
Overall Diameter0.375 INCHES NOMINAL IN
Thickness0.031 INCHES NOMINAL IN
Hole Diameter0.203 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
4730-00-474-169811618 INTERCHANGEABLE
Reducer,boss
Hydro-Aire Aerospace Corp
5340-01-118-486011618 INTERCHANGEABLE
Damper,shimmy
Westerbeke Corporation
5330-01-348-835111618 INTERCHANGEABLE
Gasket
W.w. Grainger, Inc. Div Government Sales Division
5310-01-669-4714 INTERCHANGEABLE
Washer,flat
Cross-Reference Index
Part NumberManufacturer
11618 PRIMARY Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA)
11618 Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp. (CAN)
Related Parts
4730-00-474-1698INTERCHANGEABLE
REDUCER,BOSS
11618
5340-01-118-4860INTERCHANGEABLE
DAMPER,SHIMMY
11618
5330-01-348-8351INTERCHANGEABLE
GASKET
11618
5310-01-669-4714INTERCHANGEABLE
WASHER,FLAT

Frequently Asked Questions

What is NSN 5310-00-216-3116?

NSN 5310-00-216-3116 is a Washer,flat, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-216-3116?

NSN 5310-00-216-3116 has 2 cross-referenced part numbers: 11618 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 11618 (Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.).

What NSN replaces 5310-00-216-3116?

There are 4 known substitutes for 5310-00-216-3116: 4730-00-474-1698, 5340-01-118-4860, 5330-01-348-8351 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 11618?

Key specifications for 11618: Center Hole Shape Style: ROUND; Material: STEEL OVERALL; Peripheral Shape Style: ROUND; Cross-Sectional Shape Style: RECTANGULAR. 8 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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