PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

98025A133Washer,flat

Mcmaster-Carr Supply Co · NSN 5310-01-435-8312 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-435-8312 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-435-8312. Primary manufacturer part number: 98025A133.
Features
  • Washer,flat — FSC 5310
  • Center Hole Shape Style: ROUND
  • Material: STEEL OVERALL
  • Surface Treatment: ZINC OVERALL
  • Hole Diameter: 0.526 INCHES NOMINAL IN
  • Cross-Sectional Shape Style: RECTANGULAR
  • Overall Diameter: 1.092 INCHES NOMINAL IN
  • Peripheral Shape Style: ROUND
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 5310-01-435-8312, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Mcmaster-Carr Supply Co. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references 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
NSN5310-01-435-8312
Primary Part Number98025A133
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerMcmaster-Carr Supply Co
StatusACTIVE
Center Hole Shape StyleROUND
MaterialSTEEL OVERALL
Surface TreatmentZINC OVERALL
Hole Diameter0.526 INCHES NOMINAL IN
Cross-Sectional Shape StyleRECTANGULAR
Overall Diameter1.092 INCHES NOMINAL IN
Peripheral Shape StyleROUND
Hardness Rating43.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM
Thickness0.153 INCHES MINIMUM AND 0.213 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5315-00-141-65033257-00 INTERCHANGEABLE
Pin,straight,headless
Avox Systems Inc Dba Avox Systems Inc
5310-00-176-8169 INTERCHANGEABLE
Nut,plain,hexagon
2530-00-678-5122 INTERCHANGEABLE
Cylinder Assembly,hydraulic Brak
2040-00-806-7034 INTERCHANGEABLE
Rudder Stock
2040-00-806-7035 INTERCHANGEABLE
Rudder Stock
2815-00-979-481788683 INTERCHANGEABLE
Ring,piston
Kaydon Ring & Seal Inc Dba Skf Precision Technologies
5325-01-602-84863257 INTERCHANGEABLE
Ring,retaining
DP Manufacturing Inc.
Cross-Reference Index
Part NumberManufacturer
3257 Mcmaster-Carr Supply Co (USA)
98025A133 PRIMARY Mcmaster-Carr Supply Co (USA)
98025A033 Mcmaster-Carr Supply Co (USA)
Related Parts
5315-00-141-6503INTERCHANGEABLE
PIN,STRAIGHT,HEADLESS
3257-00
5310-00-176-8169INTERCHANGEABLE
NUT,PLAIN,HEXAGON
2530-00-678-5122INTERCHANGEABLE
CYLINDER ASSEMBLY,HYDRAULIC BRAK
2040-00-806-7034INTERCHANGEABLE
RUDDER STOCK
2040-00-806-7035INTERCHANGEABLE
RUDDER STOCK
2815-00-979-4817INTERCHANGEABLE
RING,PISTON
88683
5325-01-602-8486INTERCHANGEABLE
RING,RETAINING
3257

Frequently Asked Questions

What is NSN 5310-01-435-8312?

NSN 5310-01-435-8312 is a Washer,flat, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-435-8312?

NSN 5310-01-435-8312 has 3 cross-referenced part numbers: 3257 (Mcmaster-Carr Supply Co), 98025A133 (Mcmaster-Carr Supply Co), 98025A033 (Mcmaster-Carr Supply Co).

What NSN replaces 5310-01-435-8312?

There are 7 known substitutes for 5310-01-435-8312: 5315-00-141-6503, 5310-00-176-8169, 2530-00-678-5122 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 98025A133?

Key specifications for 98025A133: Center Hole Shape Style: ROUND; Material: STEEL OVERALL; Surface Treatment: ZINC OVERALL; Hole Diameter: 0.526 INCHES NOMINAL IN. 9 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com