PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1-2WA5-126YSSWasher,keyway

Mark Controls Corp Pacific Valves Div · NSN 5310-00-726-0811 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-726-0811 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-726-0811. Primary manufacturer part number: 1-2WA5-126YSS.
Features
  • Washer,keyway — FSC 5310
  • Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
  • Criticality Code Justification: ZZZY
  • 6 verified cross-references
  • Primary manufacturer: Mark Controls Corp Pacific Valves Div
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Washer,keyway, cataloged under National Stock Number 5310-00-726-0811, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Mark Controls Corp Pacific Valves Div. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 1 manufacturer, 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
NSN5310-00-726-0811
Primary Part Number1-2WA5-126YSS
Item NameWasher,keyway
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerMark Controls Corp Pacific Valves Div
StatusACTIVE
Reference Number Differentiating CharacteristicsMATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
Criticality Code JustificationZZZY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5330-00-090-57765852 INTERCHANGEABLE
Gasket
Eaton Corp Transmission Div
8115-00-117-8347117-8347 INTERCHANGEABLE
Box,shipping
Arvco Container Corporation Div Arvco Container Corp
3110-00-237-694610-60952-1 INTERCHANGEABLE
Bearing,ball,annular
Industrial Tectonics Bearings Corporation Dba Rbc Bearings Inc Div Industrial Tectonics Bearings
5960-00-248-3057 INTERCHANGEABLE
Electron Tube
2805-00-354-649658-52 INTERCHANGEABLE
Guide,valve Stem
Dresser Industries Inc Leroi Div
5330-00-360-8491 INTERCHANGEABLE
Gasket
7460-00-369-5087 INTERCHANGEABLE
Pocket,visible Index File
1680-00-373-80448347 INTERCHANGEABLE
Gearbox Assembly,aircraft
Cef Industries, Llc Dba Cef Industries Inc
2805-00-383-9015005852 INTERCHANGEABLE
Valve,poppet,engine
Caterpillar Inc Div Caterpillar Defense
5340-00-403-76788347 INTERCHANGEABLE
Standoff,threaded,spacing
Halsit Holdings Llc Div Halsit Holdings, Llc Dba Abbatron
Cross-Reference Index
Part NumberManufacturer
1-2WA5-126YSS Mark Controls Corp Pacific Valves Div (USA)
8347 Mark Controls Corp Pacific Valves Div (USA)
5852E Mark Controls Corp Pacific Valves Div (USA)
1/2WA3-126Y Mark Controls Corp Pacific Valves Div (USA)
1/2WA-126Y Mark Controls Corp Pacific Valves Div (USA)
5852 Mark Controls Corp Pacific Valves Div (USA)
Related Parts
5330-00-090-5776INTERCHANGEABLE
GASKET
5852
8115-00-117-8347INTERCHANGEABLE
BOX,SHIPPING
117-8347
3110-00-237-6946INTERCHANGEABLE
BEARING,BALL,ANNULAR
10-60952-1
5960-00-248-3057INTERCHANGEABLE
ELECTRON TUBE
2805-00-354-6496INTERCHANGEABLE
GUIDE,VALVE STEM
58-52
5330-00-360-8491INTERCHANGEABLE
GASKET
7460-00-369-5087INTERCHANGEABLE
POCKET,VISIBLE INDEX FILE
1680-00-373-8044INTERCHANGEABLE
GEARBOX ASSEMBLY,AIRCRAFT
8347
2805-00-383-9015INTERCHANGEABLE
VALVE,POPPET,ENGINE
005852
5340-00-403-7678INTERCHANGEABLE
STANDOFF,THREADED,SPACING
8347
6640-00-480-0194INTERCHANGEABLE
BOTTLE,SCREW CAP
6625-00-492-6697INTERCHANGEABLE
TEST SET SUBASSEMBLY,ELECTRICAL
5852

Frequently Asked Questions

What is NSN 5310-00-726-0811?

NSN 5310-00-726-0811 is a Washer,keyway, manufactured by Mark Controls Corp Pacific Valves Div, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-726-0811?

NSN 5310-00-726-0811 has 6 cross-referenced part numbers: 1-2WA5-126YSS (Mark Controls Corp Pacific Valves Div), 8347 (Mark Controls Corp Pacific Valves Div), 5852E (Mark Controls Corp Pacific Valves Div), 1/2WA3-126Y (Mark Controls Corp Pacific Valves Div), 1/2WA-126Y (Mark Controls Corp Pacific Valves Div) and 1 more.

What NSN replaces 5310-00-726-0811?

There are 12 known substitutes for 5310-00-726-0811: 5330-00-090-5776, 8115-00-117-8347, 3110-00-237-6946 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1-2WA5-126YSS?

Key specifications for 1-2WA5-126YSS: Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.; Criticality Code Justification: ZZZY. 2 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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