PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

101856O-Ring

Hammonds Technical Services, Inc. · NSN 5331-01-721-1245 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-01-721-1245 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-721-1245. Primary manufacturer part number: 101856.
Features
  • O-Ring — FSC 5331
  • Outside Diameter: 0.762 INCHES NOMINAL IN
  • Center Hole Diameter: 0.484 INCHES NOMINAL IN
  • Cross-Sectional Height: 0.139 INCHES NOMINAL IN
  • 1 verified cross-reference
  • Primary manufacturer: Hammonds Technical Services, Inc.
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The O-Ring, cataloged under National Stock Number 5331-01-721-1245, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Hammonds Technical Services, Inc.. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5331-01-721-1245
Primary Part Number101856
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerHammonds Technical Services, Inc.
StatusACTIVE
Outside Diameter0.762 INCHES NOMINAL IN
Center Hole Diameter0.484 INCHES NOMINAL IN
Cross-Sectional Height0.139 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
6605-00-082-079510-1856TY1 INTERCHANGEABLE
Indicator,course
Ruta Supplies Inc
5905-00-165-3238101856 INTERCHANGEABLE
Resistor,electrical
Bull SAS
5360-00-331-0031 INTERCHANGEABLE
Spring,flat
6610-00-942-3075101856 INTERCHANGEABLE
Plate,pitch Trim
Astronautics Corporation of America
6130-01-096-8728 INTERCHANGEABLE
Power Supply Subassembly
4730-01-324-2071101856-11 INTERCHANGEABLE
Tee,pipe
Provision, Inc. Dba Provision Inc
6605-01-485-330310-1856TY4 INTERCHANGEABLE
Pelorus Stand
L3 Technologies, Inc.
Cross-Reference Index
Part NumberManufacturer
101856 PRIMARY Hammonds Technical Services, Inc. (USA)
Related Parts
6605-00-082-0795INTERCHANGEABLE
INDICATOR,COURSE
10-1856TY1
5905-00-165-3238INTERCHANGEABLE
RESISTOR,ELECTRICAL
101856
5360-00-331-0031INTERCHANGEABLE
SPRING,FLAT
6610-00-942-3075INTERCHANGEABLE
PLATE,PITCH TRIM
101856
6130-01-096-8728INTERCHANGEABLE
POWER SUPPLY SUBASSEMBLY
4730-01-324-2071INTERCHANGEABLE
TEE,PIPE
101856-11
6605-01-485-3303INTERCHANGEABLE
PELORUS STAND
10-1856TY4

Frequently Asked Questions

What is NSN 5331-01-721-1245?

NSN 5331-01-721-1245 is a O-Ring, manufactured by Hammonds Technical Services, Inc., classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-01-721-1245?

NSN 5331-01-721-1245 has 1 cross-referenced part number: 101856 (Hammonds Technical Services, Inc.).

What NSN replaces 5331-01-721-1245?

There are 7 known substitutes for 5331-01-721-1245: 6605-00-082-0795, 5905-00-165-3238, 5360-00-331-0031 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 101856?

Key specifications for 101856: Outside Diameter: 0.762 INCHES NOMINAL IN; End Item Identification: 4930-01-706-1485; Part Name Assigned by Controlling Agency: 206 O-RING AFLAS 80,P5; Center Hole Diameter: 0.484 INCHES NOMINAL IN. 5 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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