PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20421Washer,lock

Tulsa Winch, Inc. · NSN 5310-01-391-4277 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-391-4277 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-391-4277. Primary manufacturer part number: 20421.
Features
  • Washer,lock — FSC 5310
  • 1 verified cross-reference
  • Primary manufacturer: Tulsa Winch, Inc.
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Washer,lock, cataloged under National Stock Number 5310-01-391-4277, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Tulsa Winch, Inc.. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameWasher,lock
FSC / FSG5310 — No Item Name Available (FSG 53)
ManufacturersTulsa Winch, Inc. (CAGE 75096)
Technical Specifications
ParameterValue
NSN5310-01-391-4277
Primary Part Number20421
Item NameWasher,lock
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerTulsa Winch, Inc.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
6210-00-223-64652042-1 INTERCHANGEABLE
Light Assembly,indicator
Safran Electronics & Defense, Avionics Usa, Llc
5940-00-503-6368245004 INTERCHANGEABLE
Terminal,stud
Cae Usa Inc.
5815-00-600-2685 INTERCHANGEABLE
Plug,connector
6210-00-776-1661 INTERCHANGEABLE
Lens,light
5999-00-790-16168513216 INTERCHANGEABLE
Contact,electrical
Us Army Aviation and Missile Command
5330-01-017-153520421 INTERCHANGEABLE
Gasket
Parker-Hannifin Corporation Dba Parker Hannifin Advanced Products Co Div Composite Sealing Systems Division
6550-01-408-4901R20421 INTERCHANGEABLE
Reference Standard Set,latex Par
Remel Inc.
5120-01-430-7993 INTERCHANGEABLE
Wrench,box and Open End,combinat
7920-01-585-41502042-1 INTERCHANGEABLE
Brush,scrub
Tech Spray Inc
4820-01-672-681820421 INTERCHANGEABLE
Valve,ball
United States Plastic Corp
Cross-Reference Index
Part NumberManufacturer
20421 Tulsa Winch, Inc. (USA)
Related Parts
6210-00-223-6465INTERCHANGEABLE
LIGHT ASSEMBLY,INDICATOR
2042-1
5940-00-503-6368INTERCHANGEABLE
TERMINAL,STUD
245004
5815-00-600-2685INTERCHANGEABLE
PLUG,CONNECTOR
6210-00-776-1661INTERCHANGEABLE
LENS,LIGHT
5999-00-790-1616INTERCHANGEABLE
CONTACT,ELECTRICAL
8513216
5330-01-017-1535INTERCHANGEABLE
GASKET
20421
6550-01-408-4901INTERCHANGEABLE
REFERENCE STANDARD SET,LATEX PAR
R20421
5120-01-430-7993INTERCHANGEABLE
WRENCH,BOX AND OPEN END,COMBINAT
7920-01-585-4150INTERCHANGEABLE
BRUSH,SCRUB
2042-1
4820-01-672-6818INTERCHANGEABLE
VALVE,BALL
20421
4310-01-706-2918INTERCHANGEABLE
RING,PISTON
18-20417-12R1

Frequently Asked Questions

What is NSN 5310-01-391-4277?

NSN 5310-01-391-4277 is a Washer,lock, manufactured by Tulsa Winch, Inc., classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-391-4277?

NSN 5310-01-391-4277 has 1 cross-referenced part number: 20421 (Tulsa Winch, Inc.).

What NSN replaces 5310-01-391-4277?

There are 11 known substitutes for 5310-01-391-4277: 6210-00-223-6465, 5940-00-503-6368, 5815-00-600-2685 and 8 more. Verify interchangeability with system specifications before substitution.

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