PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

12123Washer,recessed

Meggitt (north Hollywood), Inc. Dba Meggitt Control Systems Div Meggitt Defense Systems, Inc. · NSN 5310-01-085-3569 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-085-3569 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-085-3569. Primary manufacturer part number: 12123.
Features
  • Washer,recessed — FSC 5310
  • Recess Diameter: 0.390 INCHES NOMINAL IN
  • Material Thickness: 0.094 INCHES NOMINAL IN
  • Material: STEEL CORROSION RESISTING OVERALL
  • Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
  • Surface Treatment: PASSIVATE OVERALL
  • Style Designator: RECESSED
  • Recess Angle: 100.0 DEGREES NOMINAL
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Corrosion Resisting Overall construction
General Description

The Washer,recessed, cataloged under National Stock Number 5310-01-085-3569, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Meggitt (north Hollywood), Inc. Dba Meggitt Control Systems Div Meggitt Defense Systems, Inc.. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 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
NSN5310-01-085-3569
Primary Part Number12123
Item NameWasher,recessed
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerMeggitt (north Hollywood), Inc. Dba Meggitt Control Systems Div Meggitt Defense Systems, Inc.
StatusACTIVE
Recess Diameter0.390 INCHES NOMINAL IN
Material Thickness0.094 INCHES NOMINAL IN
MaterialSTEEL CORROSION RESISTING OVERALL
Surface Treatment Document and ClassificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Surface TreatmentPASSIVATE OVERALL
Style DesignatorRECESSED
Recess Angle100.0 DEGREES NOMINAL
Hole Diameter0.203 INCHES NOMINAL IN
Outside Diameter0.500 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5310-00-208-9514 INTERCHANGEABLE
Nut,plain,hexagon
5133-00-227-9665 INTERCHANGEABLE
Drill,twist
6210-00-270-4180 INTERCHANGEABLE
Lens,light
5110-00-507-251239D2451-1 INTERCHANGEABLE
Punch,dimpling
Us Army Aviation and Missile Command
5136-00-580-7364310316 INTERCHANGEABLE
Tap,thread Cutting
Stanley Tools Div of Stanley Works
6105-00-917-6509112123 INTERCHANGEABLE
Motor,direct Current
Linde Material Handling North America Corporation
5945-00-946-4435EA8272R6 INTERCHANGEABLE
Relay,electromagnetic
Te Connectivity Corporation
5950-01-041-678712123 INTERCHANGEABLE
Reactor
L3 Technologies, Inc. Div Communication Systems-West
4720-01-286-234512123 INTERCHANGEABLE
Hose Set,nonmetallic
Elbitamerica, Inc.
6550-01-397-655812123 INTERCHANGEABLE
Kit,plasmid
Qiagen, Llc
Cross-Reference Index
Part NumberManufacturer
12123 PRIMARY Meggitt (north Hollywood), Inc. Dba Meggitt Control Systems Div Meggitt Defense Systems, Inc. (USA)
12123 Howden Fluid Systems (USA)
Related Parts
5310-00-208-9514INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5133-00-227-9665INTERCHANGEABLE
DRILL,TWIST
6210-00-270-4180INTERCHANGEABLE
LENS,LIGHT
5110-00-507-2512INTERCHANGEABLE
PUNCH,DIMPLING
39D2451-1
5136-00-580-7364INTERCHANGEABLE
TAP,THREAD CUTTING
310316
6105-00-917-6509INTERCHANGEABLE
MOTOR,DIRECT CURRENT
112123
5945-00-946-4435INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
EA8272R6
5950-01-041-6787INTERCHANGEABLE
REACTOR
12123
4720-01-286-2345INTERCHANGEABLE
HOSE SET,NONMETALLIC
12123
6550-01-397-6558INTERCHANGEABLE
KIT,PLASMID
12123
5310-01-413-0805INTERCHANGEABLE
WASHER,FLAT
12123
5998-01-476-8234INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
12123

Frequently Asked Questions

What is NSN 5310-01-085-3569?

NSN 5310-01-085-3569 is a Washer,recessed, manufactured by Meggitt (north Hollywood), Inc. Dba Meggitt Control Systems Div Meggitt Defense Systems, Inc., classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-085-3569?

NSN 5310-01-085-3569 has 2 cross-referenced part numbers: 12123 (Meggitt (north Hollywood), Inc. Dba Meggitt Control Systems Div Meggitt Defense Systems, Inc.), 12123 (Howden Fluid Systems).

What NSN replaces 5310-01-085-3569?

There are 12 known substitutes for 5310-01-085-3569: 5310-00-208-9514, 5133-00-227-9665, 6210-00-270-4180 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 12123?

Key specifications for 12123: Recess Diameter: 0.390 INCHES NOMINAL IN; Material Thickness: 0.094 INCHES NOMINAL IN; Material: STEEL CORROSION RESISTING OVERALL; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 9 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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