PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

338956Washer,recessed

Lockheed Martin Corp · NSN 5310-00-285-8144 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-285-8144 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-285-8144. Primary manufacturer part number: 338956.
Features
  • Washer,recessed — FSC 5310
  • Hole Diameter: 1.031 INCHES NOMINAL IN
  • Material Thickness: 0.150 INCHES NOMINAL IN
  • Material: STEEL COMP 8630 OVERALL
  • Recess Diameter: 1.200 INCHES NOMINAL IN
  • Outside Diameter: 1.625 INCHES NOMINAL IN
  • Recess Angle: 90.0 DEGREES NOMINAL
  • Style Designator: RECESSED
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 8630 Overall construction
General Description

The Washer,recessed, cataloged under National Stock Number 5310-00-285-8144, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Lockheed Martin Corp. Government technical data includes 8 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-285-8144
Primary Part Number338956
Item NameWasher,recessed
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerLockheed Martin Corp
StatusACTIVE
Hole Diameter1.031 INCHES NOMINAL IN
Material Thickness0.150 INCHES NOMINAL IN
MaterialSTEEL COMP 8630 OVERALL
Recess Diameter1.200 INCHES NOMINAL IN
Outside Diameter1.625 INCHES NOMINAL IN
Recess Angle90.0 DEGREES NOMINAL
Style DesignatorRECESSED
Material Document and ClassificationMIL-S-6050 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
6730-00-341-7867SC-B-96295 INTERCHANGEABLE
Shaft Assembly,control
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
Cross-Reference Index
Part NumberManufacturer
338956 Mercer Products & Manufacturing Company Dba Mercer Products & Manufacturing Co Div Mercer Products & Manufacturing (USA)
338956 PRIMARY Lockheed Martin Corp (USA)
Related Parts
6730-00-341-7867INTERCHANGEABLE
SHAFT ASSEMBLY,CONTROL
SC-B-96295

Frequently Asked Questions

What is NSN 5310-00-285-8144?

NSN 5310-00-285-8144 is a Washer,recessed, manufactured by Lockheed Martin Corp, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-285-8144?

NSN 5310-00-285-8144 has 2 cross-referenced part numbers: 338956 (Mercer Products & Manufacturing Company Dba Mercer Products & Manufacturing Co Div Mercer Products & Manufacturing), 338956 (Lockheed Martin Corp).

What NSN replaces 5310-00-285-8144?

There is 1 known substitute for 5310-00-285-8144: 6730-00-341-7867. Verify interchangeability with system specifications before substitution.

What are the specifications of 338956?

Key specifications for 338956: Hole Diameter: 1.031 INCHES NOMINAL IN; Material Thickness: 0.150 INCHES NOMINAL IN; Material: STEEL COMP 8630 OVERALL; Recess Diameter: 1.200 INCHES NOMINAL IN. 8 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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