PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

SP-12Washer,flat

Morton Machine Works · NSN 5310-01-435-6444 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-435-6444 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-435-6444. Primary manufacturer part number: SP-12.
Features
  • Washer,flat — FSC 5310
  • Center Hole Shape Style: ROUND
  • Hole Diameter: 2.062 INCHES NOMINAL IN
  • Cross-Sectional Shape Style: RECTANGULAR
  • Overall Diameter: 3.875 INCHES NOMINAL IN
  • Peripheral Shape Style: ROUND
  • Thickness: 0.750 INCHES NOMINAL IN
  • Material: STEEL OVERALL
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 5310-01-435-6444, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Morton Machine Works. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-435-6444
Primary Part NumberSP-12
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerMorton Machine Works
StatusACTIVE
Center Hole Shape StyleROUND
Hole Diameter2.062 INCHES NOMINAL IN
Cross-Sectional Shape StyleRECTANGULAR
Overall Diameter3.875 INCHES NOMINAL IN
Peripheral Shape StyleROUND
Thickness0.750 INCHES NOMINAL IN
MaterialSTEEL OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
2930-00-200-8138SP-29 INTERCHANGEABLE
Cap,filler Opening
Stant Mfg Co Inc
5305-00-269-646346031PC5 INTERCHANGEABLE
Screw,machine
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5310-00-290-8992 INTERCHANGEABLE
Washer,flat
6240-00-449-2070517-4-91930-000 INTERCHANGEABLE
Lamp,incandescent
Eaton Limited
5340-00-804-1252 INTERCHANGEABLE
Plug,protective,dust and Moistur
5305-01-205-2525 INTERCHANGEABLE
Screw
4820-01-323-6165SPD-C1Q-A INTERCHANGEABLE
Valve,ball
Imi Critical Engr Pbm Llc
4510-01-341-7040SP12 INTERCHANGEABLE
Head,eye Wash,fountain
Haws Corporation
4235-01-450-0806STS-SP-001 INTERCHANGEABLE
Spill Clean-Up Kit,hazardous Mat
Safe-Tech Solutions Llc Dba Safe Tech Solutions Llc
4730-01-693-8272SP-12 INTERCHANGEABLE
Flange,pipe,blind
Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division
Cross-Reference Index
Part NumberManufacturer
SP-12 PRIMARY Morton Machine Works (USA)
Related Parts
2930-00-200-8138INTERCHANGEABLE
CAP,FILLER OPENING
SP-29
5305-00-269-6463INTERCHANGEABLE
SCREW,MACHINE
46031PC5
5310-00-290-8992INTERCHANGEABLE
WASHER,FLAT
6240-00-449-2070INTERCHANGEABLE
LAMP,INCANDESCENT
517-4-91930-000
5340-00-804-1252INTERCHANGEABLE
PLUG,PROTECTIVE,DUST AND MOISTUR
5305-01-205-2525INTERCHANGEABLE
SCREW
4820-01-323-6165INTERCHANGEABLE
VALVE,BALL
SPD-C1Q-A
4510-01-341-7040INTERCHANGEABLE
HEAD,EYE WASH,FOUNTAIN
SP12
4235-01-450-0806INTERCHANGEABLE
SPILL CLEAN-UP KIT,HAZARDOUS MAT
STS-SP-001
4730-01-693-8272INTERCHANGEABLE
FLANGE,PIPE,BLIND
SP-12

Frequently Asked Questions

What is NSN 5310-01-435-6444?

NSN 5310-01-435-6444 is a Washer,flat, manufactured by Morton Machine Works, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-435-6444?

NSN 5310-01-435-6444 has 1 cross-referenced part number: SP-12 (Morton Machine Works).

What NSN replaces 5310-01-435-6444?

There are 10 known substitutes for 5310-01-435-6444: 2930-00-200-8138, 5305-00-269-6463, 5310-00-290-8992 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of SP-12?

Key specifications for SP-12: Center Hole Shape Style: ROUND; Hole Diameter: 2.062 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Overall Diameter: 3.875 INCHES NOMINAL IN. 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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