PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

103321Washer,lock

General Motors Llc Dba General Motors Llc · NSN 5310-00-261-7340 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-261-7340 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-261-7340. Primary manufacturer part number: 103321.
Features
  • Washer,lock — FSC 5310
  • Material Document and Classification: ASTM A576 ASSN STD ALL MATERIAL RESPONSES OVERALL
  • Style Designator: SPLIT HELICAL-RIGHT HAND
  • Outside Diameter: 0.680 INCHES MAXIMUM IN
  • Material Thickness: 0.094 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN
  • Hole Diameter: 0.377 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
  • Material: STEEL OVERALL
  • Hardness Rating: 38.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Washer,lock, cataloged under National Stock Number 5310-00-261-7340, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is General Motors Llc Dba General Motors Llc. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 50 commercial cross-references from 43 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-261-7340
Primary Part Number103321
Item NameWasher,lock
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerGeneral Motors Llc Dba General Motors Llc
StatusCANCELLED
Material Document and ClassificationASTM A576 ASSN STD ALL MATERIAL RESPONSES OVERALL
Style DesignatorSPLIT HELICAL-RIGHT HAND
Outside Diameter0.680 INCHES MAXIMUM IN
Material Thickness0.094 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN
Hole Diameter0.377 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
MaterialSTEEL OVERALL
Hardness Rating38.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5310-00-012-0382102768 INTERCHANGEABLE
Washer,lock
Garwood/feller Inc Garwood Winch Div
5961-00-089-0689PC6620-1 INTERCHANGEABLE
Semiconductor Devices,unitized
Rockwell Collins, Inc. Dba Rc Displays Systems
5330-00-092-7364C291-7 INTERCHANGEABLE
Gasket
Lockheed Martin Corporation Div Lockheed Martin Aeronautics Company
4730-00-134-422221052 INTERCHANGEABLE
Clamp,hose
Norma Pennsylvania Inc. Div Breeze Industrial Products
3110-00-155-8992XLS76K2 INTERCHANGEABLE
Bearing,ball,annular
Timken Co Div the Timken Company
5360-00-200-7982199993PC5 INTERCHANGEABLE
Spring,helical,compression
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5310-00-209-0933202983 INTERCHANGEABLE
Washer,lock
Bendix Commercial Vehicle Systems Llc Dba Bendix Commercial Vehicle Systems
5310-00-209-560611151676 INTERCHANGEABLE
Washer,spring Tension
Us Army Aviation and Missile Command
3110-00-227-2758 INTERCHANGEABLE
Bearing,ball,thrust
5910-00-246-8946 INTERCHANGEABLE
Capacitor,fixed,mica Dielectric
Cross-Reference Index
Part NumberManufacturer
S604 Cummins Ltd (GBR)
MS35338-8 Liebherr-Aerospace Lindenberg Gmbh (DEU)
40S33 General Motors Corp (USA)
103321 Delphi France SAS (FRA)
9284 Ford Motor Company (USA)
103321 PRIMARY General Motors Llc Dba General Motors Llc (USA)
11FM1A3-8 PRIMARY Fairbanks Morse, Llc (USA)
40S33 PRIMARY General Motors Llc Dba General Motors Llc (USA)
130MBC1 PRIMARY Linde Material Handling North America Corporation (USA)
S604 Goriziane Group Spa (ITA)
M468 Wrought Washer Mfg., Inc. (USA)
103221 PRIMARY Us Army Aviation and Missile Command (USA)
H22-56-52 PRIMARY Edgewood Chemical Biological Center Ecbc (USA)
103321 Diamond Reo Truck Co (USA)
T61 Saf-Holland, Inc. (USA)
WA16 Meritor Industrial Products, Llc (USA)
103321 PRIMARY Rolls-Royce Solutions America Inc (USA)
0904206-0 PRIMARY Agco Corp Parts Opn (USA)
23265 PRIMARY Renk America Llc Div Renk America (USA)
904206 Allis-Chalmers Corp (USA)
Related Parts
5310-00-012-0382INTERCHANGEABLE
WASHER,LOCK
102768
5961-00-089-0689INTERCHANGEABLE
SEMICONDUCTOR DEVICES,UNITIZED
PC6620-1
5330-00-092-7364INTERCHANGEABLE
GASKET
C291-7
4730-00-134-4222INTERCHANGEABLE
CLAMP,HOSE
21052
3110-00-155-8992INTERCHANGEABLE
BEARING,BALL,ANNULAR
XLS76K2
5360-00-200-7982INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
199993PC5
5310-00-209-0933INTERCHANGEABLE
WASHER,LOCK
202983
5310-00-209-5606INTERCHANGEABLE
WASHER,SPRING TENSION
11151676
3110-00-227-2758INTERCHANGEABLE
BEARING,BALL,THRUST
5910-00-246-8946INTERCHANGEABLE
CAPACITOR,FIXED,MICA DIELECTRIC
5331-00-248-3845INTERCHANGEABLE
O-RING
10-3321
5910-00-249-4138INTERCHANGEABLE
CAPACITOR,FIXED,MICA DIELECTRIC

Frequently Asked Questions

What is NSN 5310-00-261-7340?

NSN 5310-00-261-7340 is a Washer,lock, manufactured by General Motors Llc Dba General Motors Llc, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-261-7340?

NSN 5310-00-261-7340 has 50 cross-referenced part numbers: S604 (Cummins Ltd), MS35338-8 (Liebherr-Aerospace Lindenberg Gmbh), 40S33 (General Motors Corp), 103321 (Delphi France SAS), 9284 (Ford Motor Company) and 45 more.

What NSN replaces 5310-00-261-7340?

There are 12 known substitutes for 5310-00-261-7340: 5310-00-012-0382, 5961-00-089-0689, 5330-00-092-7364 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 103321?

Key specifications for 103321: Material Document and Classification: ASTM A576 ASSN STD ALL MATERIAL RESPONSES OVERALL; Style Designator: SPLIT HELICAL-RIGHT HAND; Outside Diameter: 0.680 INCHES MAXIMUM IN; Material Thickness: 0.094 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN. 7 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-261-7340 still in active supply?

NSN 5310-00-261-7340 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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