PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

77275Washer,key

Triumph Engine Control Systems Llc · NSN 5310-00-924-8401 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-924-8401 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-924-8401. Primary manufacturer part number: 77275.
Features
  • Washer,key — FSC 5310
  • External Straight Key Width: 0.165 INCHES NOMINAL IN
  • Surface Treatment: PASSIVATE OVERALL
  • Material: STEEL OVERALL
  • Material Document and Classification: AMS 5529 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
  • External Key Quantity: 2
  • Internal Key Quantity: 2
  • Internal Prebent Key Width: 0.165 INCHES NOMINAL IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Washer,key, cataloged under National Stock Number 5310-00-924-8401, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Triumph Engine Control Systems Llc. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-924-8401
Primary Part Number77275
Item NameWasher,key
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerTriumph Engine Control Systems Llc
StatusACTIVE
External Straight Key Width0.165 INCHES NOMINAL IN
Surface TreatmentPASSIVATE OVERALL
MaterialSTEEL OVERALL
Material Document and ClassificationAMS 5529 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
External Key Quantity2
Internal Key Quantity2
Internal Prebent Key Width0.165 INCHES NOMINAL IN
Outside Diameter1.425 INCHES NOMINAL IN
Hole Diameter1.125 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
4720-00-421-38545P1263 INTERCHANGEABLE
Hose,nonmetallic
Caterpillar Inc Div Caterpillar Defense
5365-01-166-202477275 INTERCHANGEABLE
Ring,quad
Paccar Winch Inc Dba Paccar Winch Division
Cross-Reference Index
Part NumberManufacturer
77275 PRIMARY Triumph Engine Control Systems Llc (USA)
Related Parts
4720-00-421-3854INTERCHANGEABLE
HOSE,NONMETALLIC
5P1263
5365-01-166-2024INTERCHANGEABLE
RING,QUAD
77275

Frequently Asked Questions

What is NSN 5310-00-924-8401?

NSN 5310-00-924-8401 is a Washer,key, manufactured by Triumph Engine Control Systems Llc, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-924-8401?

NSN 5310-00-924-8401 has 1 cross-referenced part number: 77275 (Triumph Engine Control Systems Llc).

What NSN replaces 5310-00-924-8401?

There are 2 known substitutes for 5310-00-924-8401: 4720-00-421-3854, 5365-01-166-2024. Verify interchangeability with system specifications before substitution.

What are the specifications of 77275?

Key specifications for 77275: External Straight Key Width: 0.165 INCHES NOMINAL IN; Surface Treatment: PASSIVATE OVERALL; Material: STEEL OVERALL; Material Document and Classification: AMS 5529 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 9 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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