PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

33021Washer,flat

Fastenal Company Dba Fastenal Co · NSN 5310-01-553-1230 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-553-1230 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-553-1230. Primary manufacturer part number: 33021.
Features
  • Washer,flat — FSC 5310
  • 6 verified cross-references
  • Primary manufacturer: Fastenal Company Dba Fastenal Co
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Washer,flat, cataloged under National Stock Number 5310-01-553-1230, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Fastenal Company Dba Fastenal Co. This item has 6 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Catalog Facts
Item NameWasher,flat
FSC / FSG5310 — No Item Name Available (FSG 53)
ManufacturersFastenal Company Dba Fastenal Co (CAGE 0Y3H3); Nd Defense Llc (CAGE 338X5); General Dynamics Land Systems - Force Protection Inc. Dba Gdls Div Gdls-Fp (CAGE 1EFH8)
Technical Specifications
ParameterValue
NSN5310-01-553-1230
Primary Part Number33021
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerFastenal Company Dba Fastenal Co
StatusCANCELLED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 8
5310-00-013-8572 INTERCHANGEABLE
Washer,lock
6625-00-643-1612 INTERCHANGEABLE
Lead,test
5365-00-923-5114154-00300 INTERCHANGEABLE
Ring,main Landing G
Aircraft Wheel and Brake, Llc Dba Cleveland Wheel and Brake Systems
5305-01-086-1539 INTERCHANGEABLE
Screw
5330-01-208-1335138572 INTERCHANGEABLE
Retainer,packing
Meggitt North Hollywood Inc
5305-01-220-299833021 INTERCHANGEABLE
Thumbscrew
Baganoff Engineering Inc Div Manufacturing
5330-01-350-4423203512 INTERCHANGEABLE
Retainer,packing
Allied Systems Company Dba Allied Systems Co
5340-01-553-854833021 INTERCHANGEABLE
Plate,mending
Powerbrace Corporation Dba Powerbrace America
Cross-Reference Index
Part NumberManufacturer
33021 PRIMARY Fastenal Company Dba Fastenal Co (USA)
ESP-F-1.301-GS Nd Defense Llc (USA)
ESP-F-1.421-NPP Nd Defense Llc (USA)
138572 Nd Defense Llc (USA)
4002550 General Dynamics Land Systems - Force Protection Inc. Dba Gdls Div Gdls-Fp (USA)
12759-00402 Fastenal Company Dba Fastenal Co (USA)
Related Parts
5310-00-013-8572INTERCHANGEABLE
WASHER,LOCK
6625-00-643-1612INTERCHANGEABLE
LEAD,TEST
5365-00-923-5114INTERCHANGEABLE
RING,MAIN LANDING G
154-00300
5305-01-086-1539INTERCHANGEABLE
SCREW
5330-01-208-1335INTERCHANGEABLE
RETAINER,PACKING
138572
5305-01-220-2998INTERCHANGEABLE
THUMBSCREW
33021
5330-01-350-4423INTERCHANGEABLE
RETAINER,PACKING
203512
5340-01-553-8548INTERCHANGEABLE
PLATE,MENDING
33021

Frequently Asked Questions

What is NSN 5310-01-553-1230?

NSN 5310-01-553-1230 is a Washer,flat, manufactured by Fastenal Company Dba Fastenal Co, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-01-553-1230?

NSN 5310-01-553-1230 has 6 cross-referenced part numbers: 33021 (Fastenal Company Dba Fastenal Co), ESP-F-1.301-GS (Nd Defense Llc), ESP-F-1.421-NPP (Nd Defense Llc), 138572 (Nd Defense Llc), 4002550 (General Dynamics Land Systems - Force Protection Inc. Dba Gdls Div Gdls-Fp) and 1 more.

What NSN replaces 5310-01-553-1230?

There are 8 known substitutes for 5310-01-553-1230: 5310-00-013-8572, 6625-00-643-1612, 5365-00-923-5114 and 5 more. Verify interchangeability with system specifications before substitution.

Is NSN 5310-01-553-1230 still in active supply?

NSN 5310-01-553-1230 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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