PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

12778Washer,flat

Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp. · NSN 5310-00-274-8038 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-274-8038 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-274-8038. Primary manufacturer part number: 12778.
Features
  • Washer,flat — FSC 5310
  • Material: COPPER ALLOY OVERALL
  • Center Hole Shape Style: ROUND
  • Thickness: 0.247 INCHES MINIMUM AND 0.253 INCHES MAXIMUM IN
  • Hole Diameter: 1.266 INCHES NOMINAL IN
  • Peripheral Shape Style: ROUND
  • Cross-Sectional Shape Style: RECTANGULAR
  • Overall Diameter: 2.250 INCHES NOMINAL IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Copper Alloy Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-00-274-8038, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.. Government technical data includes 7 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. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-274-8038
Primary Part Number12778
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerTiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.
StatusACTIVE
MaterialCOPPER ALLOY OVERALL
Center Hole Shape StyleROUND
Thickness0.247 INCHES MINIMUM AND 0.253 INCHES MAXIMUM IN
Hole Diameter1.266 INCHES NOMINAL IN
Peripheral Shape StyleROUND
Cross-Sectional Shape StyleRECTANGULAR
Overall Diameter2.250 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
6685-00-342-4028 INTERCHANGEABLE
Gage,pressure,dial Indicating
3020-00-451-255412778 INTERCHANGEABLE
Gear,bevel
Scientific Atlanta Inc
5950-00-480-172212778 INTERCHANGEABLE
Transformer,power
Oeco, Llc Dba Pacific Scientific Oeco Div Fire Safety and Power Systems
5310-00-614-306112778 INTERCHANGEABLE
Washer,power Pack a
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
6520-00-935-414912778 INTERCHANGEABLE
File,pulp Canal,dental
Kerr Corporation
3830-01-232-7249 INTERCHANGEABLE
Cutting Edge,moldboard
2590-01-363-134912778 INTERCHANGEABLE
Bracket,vehicular Components
DP Manufacturing Inc.
Cross-Reference Index
Part NumberManufacturer
12778 PRIMARY Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp. (USA)
Related Parts
6685-00-342-4028INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
3020-00-451-2554INTERCHANGEABLE
GEAR,BEVEL
12778
5950-00-480-1722INTERCHANGEABLE
TRANSFORMER,POWER
12778
5310-00-614-3061INTERCHANGEABLE
WASHER,POWER PACK A
12778
6520-00-935-4149INTERCHANGEABLE
FILE,PULP CANAL,DENTAL
12778
3830-01-232-7249INTERCHANGEABLE
CUTTING EDGE,MOLDBOARD
2590-01-363-1349INTERCHANGEABLE
BRACKET,VEHICULAR COMPONENTS
12778

Frequently Asked Questions

What is NSN 5310-00-274-8038?

NSN 5310-00-274-8038 is a Washer,flat, manufactured by Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp., classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-274-8038?

NSN 5310-00-274-8038 has 1 cross-referenced part number: 12778 (Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.).

What NSN replaces 5310-00-274-8038?

There are 7 known substitutes for 5310-00-274-8038: 6685-00-342-4028, 3020-00-451-2554, 5950-00-480-1722 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 12778?

Key specifications for 12778: Material: COPPER ALLOY OVERALL; Center Hole Shape Style: ROUND; Thickness: 0.247 INCHES MINIMUM AND 0.253 INCHES MAXIMUM IN; Hole Diameter: 1.266 INCHES NOMINAL IN. 7 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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