PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

945-4PWasher,flat

Meggitt Troy Inc · NSN 5310-00-809-3078 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-809-3078 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-809-3078. Primary manufacturer part number: 945-4P.
Features
  • Washer,flat — FSC 5310
  • Material Document and Classification: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
  • Material: STEEL OVERALL
  • Departure From Cited Document: AS MODIFIED BY THE FINISH
  • Nondefinitive Spec/std Data: A TYPE AND 1 GRADE AND A CLASS
  • Surface Treatment: CADMIUM AND CHROMATE OVERALL
  • Thickness: 0.051 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
  • Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
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 5310-00-809-3078, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Meggitt Troy Inc. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 38 commercial cross-references from 33 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-809-3078
Primary Part Number945-4P
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerMeggitt Troy Inc
StatusCANCELLED
Material Document and Classification66 FED STD SINGLE MATERIAL RESPONSE OVERALL
MaterialSTEEL OVERALL
Departure From Cited DocumentAS MODIFIED BY THE FINISH
Nondefinitive Spec/std DataA TYPE AND 1 GRADE AND A CLASS
Surface TreatmentCADMIUM AND CHROMATE OVERALL
Thickness0.051 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
Surface Treatment Document and ClassificationQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Center Hole Shape StyleROUND
Overall Diameter0.727 INCHES MINIMUM AND 0.749 INCHES MAXIMUM IN
Hole Diameter0.307 INCHES MINIMUM AND 0.327 INCHES MAXIMUM IN
Cross-Sectional Shape StyleRECTANGULAR
Peripheral Shape StyleROUND
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5310-00-012-0393120393 INTERCHANGEABLE
Washer,flat
Dressta North America Ltd
5310-00-081-4219 INTERCHANGEABLE
Washer,flat
5930-00-090-418434-515 INTERCHANGEABLE
Bushing
Bae Systems Information and Electronic Systems Integration Inc. Dba Bae Systems
4320-00-126-523910344 INTERCHANGEABLE
Ringx Antern
Rps-Fl, Inc. Dba Rps Inc
5365-00-131-6346SM-B-187507 INTERCHANGEABLE
Spacer
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
4820-00-232-94431034-4 INTERCHANGEABLE
Connector,regulator
Tescom Corp Dba Tescom Div Tescom
5310-00-285-1583 INTERCHANGEABLE
Washer,flat
5930-00-301-5828 INTERCHANGEABLE
Switch,rotary
2825-00-333-125810344 INTERCHANGEABLE
Head,valve
Northrop Grumman Systems Corporation Div Marine Systems
5950-00-421-89439918 INTERCHANGEABLE
Transformer,power
Standex Electronics, Inc.
Cross-Reference Index
Part NumberManufacturer
945-4P Meggitt Troy Inc (USA)
526-130 Cummins Power Generation Inc. (USA)
85816 Brockway Motor Trucks Div of Mack Trucks Inc (USA)
34705S Ford Motor Co Ford Parts and Service Div Government Part Sales (USA)
120393 Davey Compressor Co Div of Keco Industries Inc (USA)
5118-103-15 Aesys Technologies, L.l.c. Dba Jackson & Church Hvac Global Div York Shipley Global (USA)
912464 Allis-Chalmers Corp (USA)
PC106261 Power Components (deutschland) Gmbh (DEU)
FF-W-92 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
106261 Chrysler Realty Company Llc Dba Daimler Chrysler (USA)
MS27183-11 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
5310008093078 E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales
21&64IDSCP Allmetal Screw Products Corp (USA)
120110-3 Rosemount Analytical, Inc. Div Process Analytical Division (USA)
34515 Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp. (USA)
MS15795-11 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
AN945-4P Aeronautical Standards Group Dept of Navy and Air Force (USA)
5310PL0656734 Jednolity Indeks Materialowy - Uniform Material Index (POL)
299-010 Dorman Products, Inc. Dba Dorman (USA)
106261 Rolls-Royce Solutions America Inc (USA)
Related Parts
5310-00-012-0393INTERCHANGEABLE
WASHER,FLAT
120393
5310-00-081-4219INTERCHANGEABLE
WASHER,FLAT
5930-00-090-4184INTERCHANGEABLE
BUSHING
34-515
4320-00-126-5239INTERCHANGEABLE
RINGX ANTERN
10344
5365-00-131-6346INTERCHANGEABLE
SPACER
SM-B-187507
4820-00-232-9443INTERCHANGEABLE
CONNECTOR,REGULATOR
1034-4
5310-00-285-1583INTERCHANGEABLE
WASHER,FLAT
5930-00-301-5828INTERCHANGEABLE
SWITCH,ROTARY
2825-00-333-1258INTERCHANGEABLE
HEAD,VALVE
10344
5950-00-421-8943INTERCHANGEABLE
TRANSFORMER,POWER
9918
9390-00-448-1782INTERCHANGEABLE
WICK
85816
5930-00-493-4956INTERCHANGEABLE
SWITCH,ROTARY
10626-1

Frequently Asked Questions

What is NSN 5310-00-809-3078?

NSN 5310-00-809-3078 is a Washer,flat, manufactured by Meggitt Troy Inc, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-809-3078?

NSN 5310-00-809-3078 has 38 cross-referenced part numbers: 945-4P (Meggitt Troy Inc), 526-130 (Cummins Power Generation Inc.), 85816 (Brockway Motor Trucks Div of Mack Trucks Inc), 34705S (Ford Motor Co Ford Parts and Service Div Government Part Sales), 120393 (Davey Compressor Co Div of Keco Industries Inc) and 33 more.

What NSN replaces 5310-00-809-3078?

There are 12 known substitutes for 5310-00-809-3078: 5310-00-012-0393, 5310-00-081-4219, 5930-00-090-4184 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 945-4P?

Key specifications for 945-4P: Material Document and Classification: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL; Material: STEEL OVERALL; Departure From Cited Document: AS MODIFIED BY THE FINISH; Nondefinitive Spec/std Data: A TYPE AND 1 GRADE AND A CLASS. 13 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-809-3078 still in active supply?

NSN 5310-00-809-3078 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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