PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

378003Washer,lock

Parker Hannifin Corporation Div Chelsea Products Division · NSN 5310-00-838-1490 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-838-1490 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-838-1490. Primary manufacturer part number: 378003.
Features
  • Washer,lock — FSC 5310
  • Hardness Rating: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
  • Material: STEEL COMP 1060 OVERALL
  • Material Document and Classification: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
  • Style Designator: SPLIT HELICAL-RIGHT HAND
  • Outside Diameter: 0.692 INCHES MINIMUM AND 0.702 INCHES MAXIMUM IN
  • Material Thickness: 0.068 INCHES MINIMUM AND 0.088 INCHES MAXIMUM IN
  • Hole Diameter: 0.318 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 1060 Overall construction
General Description

The Washer,lock, cataloged under National Stock Number 5310-00-838-1490, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Parker Hannifin Corporation Div Chelsea Products Division. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-838-1490
Primary Part Number378003
Item NameWasher,lock
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerParker Hannifin Corporation Div Chelsea Products Division
StatusACTIVE
Hardness Rating45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
MaterialSTEEL COMP 1060 OVERALL
Material Document and ClassificationSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Style DesignatorSPLIT HELICAL-RIGHT HAND
Outside Diameter0.692 INCHES MINIMUM AND 0.702 INCHES MAXIMUM IN
Material Thickness0.068 INCHES MINIMUM AND 0.088 INCHES MAXIMUM IN
Hole Diameter0.318 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
2910-00-001-9042378003 INTERCHANGEABLE
Arm,choke
Brp Us Inc
5996-00-078-7515137777-04 INTERCHANGEABLE
Amplifier,audio Frequency
Ge Aviation Systems Llc
5310-00-252-40781178 INTERCHANGEABLE
Washer,flat
Wisconsin Motors, Llc
4820-00-258-1546 INTERCHANGEABLE
Cock,plug
4820-00-272-3353 INTERCHANGEABLE
Cock,plug
5120-00-277-8834 INTERCHANGEABLE
Wrench,box and Open End,combinat
5180-00-313-9496PD5180-00-313-9496 INTERCHANGEABLE
Puller Kit,universal
General Services Administration Federal Supply Service
5305-00-369-9312 INTERCHANGEABLE
Screw,machine
5330-00-555-3779 INTERCHANGEABLE
Seal,plain Encased
6685-00-641-8526 INTERCHANGEABLE
Indicator,humidity,plug
Cross-Reference Index
Part NumberManufacturer
378003 Parker Hannifin Corporation Div Chelsea Products Division (USA)
1178 Parker Hannifin Corporation Div Chelsea Products Division (USA)
47438 Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp. (USA)
Related Parts
2910-00-001-9042INTERCHANGEABLE
ARM,CHOKE
378003
5996-00-078-7515INTERCHANGEABLE
AMPLIFIER,AUDIO FREQUENCY
137777-04
5310-00-252-4078INTERCHANGEABLE
WASHER,FLAT
1178
4820-00-258-1546INTERCHANGEABLE
COCK,PLUG
4820-00-272-3353INTERCHANGEABLE
COCK,PLUG
5120-00-277-8834INTERCHANGEABLE
WRENCH,BOX AND OPEN END,COMBINAT
5180-00-313-9496INTERCHANGEABLE
PULLER KIT,UNIVERSAL
PD5180-00-313-9496
5305-00-369-9312INTERCHANGEABLE
SCREW,MACHINE
5330-00-555-3779INTERCHANGEABLE
SEAL,PLAIN ENCASED
6685-00-641-8526INTERCHANGEABLE
INDICATOR,HUMIDITY,PLUG
6145-00-669-6642INTERCHANGEABLE
WIRE,ELECTRICAL
3120-00-776-0063INTERCHANGEABLE
BUSHING,SLEEVE
117-8

Frequently Asked Questions

What is NSN 5310-00-838-1490?

NSN 5310-00-838-1490 is a Washer,lock, manufactured by Parker Hannifin Corporation Div Chelsea Products Division, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-838-1490?

NSN 5310-00-838-1490 has 3 cross-referenced part numbers: 378003 (Parker Hannifin Corporation Div Chelsea Products Division), 1178 (Parker Hannifin Corporation Div Chelsea Products Division), 47438 (Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.).

What NSN replaces 5310-00-838-1490?

There are 12 known substitutes for 5310-00-838-1490: 2910-00-001-9042, 5996-00-078-7515, 5310-00-252-4078 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 378003?

Key specifications for 378003: Hardness Rating: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM; Material: STEEL COMP 1060 OVERALL; Material Document and Classification: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Style Designator: SPLIT HELICAL-RIGHT HAND. 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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