PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

11420005Washer,lock

Bae Systems Land & Armaments L.p. · NSN 5310-01-121-8420 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-121-8420 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-121-8420. Primary manufacturer part number: 11420005.
Features
  • Washer,lock — FSC 5310
  • Hole Diameter: 0.312 INCHES NOMINAL IN
  • 3 verified cross-references
  • Primary manufacturer: Bae Systems Land & Armaments L.p.
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Washer,lock, cataloged under National Stock Number 5310-01-121-8420, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Bae Systems Land & Armaments L.p.. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-121-8420
Primary Part Number11420005
Item NameWasher,lock
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerBae Systems Land & Armaments L.p.
StatusACTIVE
Hole Diameter0.312 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5325-00-290-82351142000-5 INTERCHANGEABLE
Stud Assembly,turnlock Fastener
Monadnock Company, the Dba Lisi Aerospace
3455-00-423-9125ASME B94.19 INTERCHANGEABLE
Cutter,milling,end
American National Standards Institute Incorporated Dba American National Standards Institute
5945-00-954-0250 INTERCHANGEABLE
Relay,electromagnetic
1680-00-960-91225677-1 INTERCHANGEABLE
Stator Assembly
Rtx Corporation Div Pratt & Whitney
Cross-Reference Index
Part NumberManufacturer
11420005 PRIMARY Bae Systems Land & Armaments L.p. (USA)
8440-15-F213 PIECE 3 Bae Systems Land & Armaments L.p. (USA)
56771 Bae Systems Land & Armaments L.p. (USA)
Related Parts
5325-00-290-8235INTERCHANGEABLE
STUD ASSEMBLY,TURNLOCK FASTENER
1142000-5
3455-00-423-9125INTERCHANGEABLE
CUTTER,MILLING,END
ASME B94.19
5945-00-954-0250INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
1680-00-960-9122INTERCHANGEABLE
STATOR ASSEMBLY
5677-1

Frequently Asked Questions

What is NSN 5310-01-121-8420?

NSN 5310-01-121-8420 is a Washer,lock, manufactured by Bae Systems Land & Armaments L.p., classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-121-8420?

NSN 5310-01-121-8420 has 3 cross-referenced part numbers: 11420005 (Bae Systems Land & Armaments L.p.), 8440-15-F213 PIECE 3 (Bae Systems Land & Armaments L.p.), 56771 (Bae Systems Land & Armaments L.p.).

What NSN replaces 5310-01-121-8420?

There are 4 known substitutes for 5310-01-121-8420: 5325-00-290-8235, 3455-00-423-9125, 5945-00-954-0250 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 11420005?

Key specifications for 11420005: Hole Diameter: 0.312 INCHES NOMINAL IN. 1 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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