PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

12312Spacer,sleeve

Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems · NSN 5365-00-821-0451 · FSC 5365 · No Item Name Available
Verified by PartsTable
NSN 5365-00-821-0451 — this item is cataloged by the U.S. Government under National Stock Number 5365-00-821-0451. Primary manufacturer part number: 12312.
Features
  • Spacer,sleeve — FSC 5365
  • Style Designator: SOLID, PLAIN, NO OUTSIDE FLANGES
  • Corner Shape: SQUARE ALL CORNERS
  • Material: STEEL OVERALL
  • Body Inside Diameter: 0.3800 INCHES MINIMUM AND 0.3900 INCHES MAXIMUM IN
  • Body Outside Diameter: 0.4950 INCHES MINIMUM AND 0.5050 INCHES MAXIMUM IN
  • 2 verified cross-references
  • Primary manufacturer: Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
Applications
  • Applications requiring Steel Overall construction
General Description

The Spacer,sleeve, cataloged under National Stock Number 5365-00-821-0451, is classified within Federal Supply Class 5365 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 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
NSN5365-00-821-0451
Primary Part Number12312
Item NameSpacer,sleeve
FSC / FSG5365 / 53 — No Item Name Available
ManufacturerStanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
StatusACTIVE
Style DesignatorSOLID, PLAIN, NO OUTSIDE FLANGES
Corner ShapeSQUARE ALL CORNERS
MaterialSTEEL OVERALL
Body Inside Diameter0.3800 INCHES MINIMUM AND 0.3900 INCHES MAXIMUM IN
Body Outside Diameter0.4950 INCHES MINIMUM AND 0.5050 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5935-00-224-0900 INTERCHANGEABLE
Socket,plug-in Electronic Compon
5136-00-227-8620 INTERCHANGEABLE
Tap,thread Cutting
5133-00-227-9654 INTERCHANGEABLE
Drill,twist
4730-00-277-78804152-400 INTERCHANGEABLE
Locknut,pipe
Flagg Stanley G & Co Inc Dba Flagg Brass
5305-00-359-8866 INTERCHANGEABLE
Screw,thumb
3020-00-486-8170 INTERCHANGEABLE
Gear,worm
5970-00-509-064212312 INTERCHANGEABLE
Insulator,antenna
Dayton-Granger, Inc.
5935-00-543-84755676 INTERCHANGEABLE
Connector,plug,electrical
Hubbell Incorporated (delaware) Dba Wiring Device-Kellems Division
5360-00-592-518612312 INTERCHANGEABLE
Spring,helical,extension
Lake Shore Systems, Inc.
5310-00-593-3409EXBRZPC22 INTERCHANGEABLE
Nut,plain,hexagon
Aerco International, Inc. Dba Aerco International Inc
Cross-Reference Index
Part NumberManufacturer
688 Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems (USA)
12312 PRIMARY Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems (USA)
Related Parts
5935-00-224-0900INTERCHANGEABLE
SOCKET,PLUG-IN ELECTRONIC COMPON
5136-00-227-8620INTERCHANGEABLE
TAP,THREAD CUTTING
5133-00-227-9654INTERCHANGEABLE
DRILL,TWIST
4730-00-277-7880INTERCHANGEABLE
LOCKNUT,PIPE
4152-400
5305-00-359-8866INTERCHANGEABLE
SCREW,THUMB
3020-00-486-8170INTERCHANGEABLE
GEAR,WORM
5970-00-509-0642INTERCHANGEABLE
INSULATOR,ANTENNA
12312
5935-00-543-8475INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
5676
5360-00-592-5186INTERCHANGEABLE
SPRING,HELICAL,EXTENSION
12312
5310-00-593-3409INTERCHANGEABLE
NUT,PLAIN,HEXAGON
EXBRZPC22
5120-00-618-4913INTERCHANGEABLE
ANVIL,JEWELER'S
5120-00-618-4913
5930-00-655-1514INTERCHANGEABLE
SWITCH,TOGGLE

Frequently Asked Questions

What is NSN 5365-00-821-0451?

NSN 5365-00-821-0451 is a Spacer,sleeve, manufactured by Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems, classified under FSC 5365 (No Item Name Available). Status: active.

What are the part numbers for NSN 5365-00-821-0451?

NSN 5365-00-821-0451 has 2 cross-referenced part numbers: 688 (Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems), 12312 (Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems).

What NSN replaces 5365-00-821-0451?

There are 12 known substitutes for 5365-00-821-0451: 5935-00-224-0900, 5136-00-227-8620, 5133-00-227-9654 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 12312?

Key specifications for 12312: Overall Length: 0.5520 INCHES MINIMUM AND 0.5600 INCHES MAXIMUM IN; Style Designator: SOLID, PLAIN, NO OUTSIDE FLANGES; Corner Shape: SQUARE ALL CORNERS; Material: STEEL OVERALL. 6 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com