PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

HH21Bushing,sleeve

Circor Naval Solutions Llc Dba Warren Pumps · NSN 3120-00-082-5968 · FSC 3120 · No Item Name Available
Verified by PartsTable
NSN 3120-00-082-5968 — this item is cataloged by the U.S. Government under National Stock Number 3120-00-082-5968. Primary manufacturer part number: HH21.
Features
  • Bushing,sleeve — FSC 3120
  • Material Document and Classification: QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Corner Shape: SQUARE INSIDE LEFT CORNER
  • Corner Shape: CHAMFERED OUTSIDE RIGHT CORNER
  • Corner Shape: SQUARE INSIDE RIGHT CORNER
  • Corner Shape: SQUARE LEFT FLANGE OUTSIDE RIGHT CORNER
  • Style Designator: SOLID, EXTERNAL FLANGE ONE END
  • Corner Shape: SQUARE OUTSIDE LEFT CORNER
Applications
  • Applications requiring Steel Comp 416 Overall construction
General Description

The Bushing,sleeve, cataloged under National Stock Number 3120-00-082-5968, is classified within Federal Supply Class 3120 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Circor Naval Solutions Llc Dba Warren Pumps. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 10 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3120-00-082-5968
Primary Part NumberHH21
Item NameBushing,sleeve
FSC / FSG3120 / 31 — No Item Name Available
ManufacturerCircor Naval Solutions Llc Dba Warren Pumps
StatusACTIVE
Material Document and ClassificationQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Corner ShapeSQUARE INSIDE LEFT CORNER
Corner ShapeCHAMFERED OUTSIDE RIGHT CORNER
Corner ShapeSQUARE INSIDE RIGHT CORNER
Corner ShapeSQUARE LEFT FLANGE OUTSIDE RIGHT CORNER
Style DesignatorSOLID, EXTERNAL FLANGE ONE END
Corner ShapeSQUARE OUTSIDE LEFT CORNER
Body Outside Diameter2.7530 INCHES MINIMUM AND 2.7540 INCHES MAXIMUM IN
Flange Outside Diameter3.0570 INCHES MINIMUM AND 3.0670 INCHES MAXIMUM IN
Flange Width0.2190 INCHES NOMINAL IN
Body Inside Diameter2.1250 INCHES MINIMUM AND 2.1270 INCHES MAXIMUM IN
MaterialSTEEL COMP 416 OVERALL
Corner ShapeSQUARE LEFT FLANGE BODY CORNER
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
4330-00-155-820512521204-9-2 INTERCHANGEABLE
Filter,fluid
Jered Llc
5133-00-189-9304 INTERCHANGEABLE
Drill,twist
6220-00-266-805811374 INTERCHANGEABLE
Retainer and Plate
Grimes Aerospace Company
5999-00-683-1339 INTERCHANGEABLE
Contact,electrical
5340-00-703-492511374 INTERCHANGEABLE
Seat,helical Compression Spring
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
5136-00-729-5694 INTERCHANGEABLE
Tap,thread Cutting
5136-00-729-5709 INTERCHANGEABLE
Tap,thread Cutting
6685-01-362-0241HH-21A INTERCHANGEABLE
Pyrometer,indicating
Omega Engineering, Inc.
5310-01-440-578511374 INTERCHANGEABLE
Washer,flat
Cone Drive Operations Inc
Cross-Reference Index
Part NumberManufacturer
15-0045-000-31 Euramco Safety Inc (USA)
R1104PC31 Circor Naval Solutions Llc Dba Warren Pumps (USA)
KMC-E15077 Krobach Mfg. Corp. Dba Krobach Manufacturing Corp (USA)
E15077 Circor Naval Solutions Llc Dba Warren Pumps (USA)
HH21 PRIMARY Circor Naval Solutions Llc Dba Warren Pumps (USA)
999R0185 PIECE 31 Circor Naval Solutions Llc Dba Warren Pumps (USA)
999R0166 PIECE 31 Circor Naval Solutions Llc Dba Warren Pumps (USA)
11374 Rps-Fl, Inc. Dba Rps Inc (USA)
R926 PIECE 31 Circor Naval Solutions Llc Dba Warren Pumps (USA)
R927 PIECE 31 Circor Naval Solutions Llc Dba Warren Pumps (USA)
Related Parts
4330-00-155-8205INTERCHANGEABLE
FILTER,FLUID
12521204-9-2
5133-00-189-9304INTERCHANGEABLE
DRILL,TWIST
6220-00-266-8058INTERCHANGEABLE
RETAINER AND PLATE
11374
5999-00-683-1339INTERCHANGEABLE
CONTACT,ELECTRICAL
5340-00-703-4925INTERCHANGEABLE
SEAT,HELICAL COMPRESSION SPRING
11374
5136-00-729-5694INTERCHANGEABLE
TAP,THREAD CUTTING
5136-00-729-5709INTERCHANGEABLE
TAP,THREAD CUTTING
6685-01-362-0241INTERCHANGEABLE
PYROMETER,INDICATING
HH-21A
5310-01-440-5785INTERCHANGEABLE
WASHER,FLAT
11374

Frequently Asked Questions

What is NSN 3120-00-082-5968?

NSN 3120-00-082-5968 is a Bushing,sleeve, manufactured by Circor Naval Solutions Llc Dba Warren Pumps, classified under FSC 3120 (No Item Name Available). Status: active.

What are the part numbers for NSN 3120-00-082-5968?

NSN 3120-00-082-5968 has 10 cross-referenced part numbers: 15-0045-000-31 (Euramco Safety Inc), R1104PC31 (Circor Naval Solutions Llc Dba Warren Pumps), KMC-E15077 (Krobach Mfg. Corp. Dba Krobach Manufacturing Corp), E15077 (Circor Naval Solutions Llc Dba Warren Pumps), HH21 (Circor Naval Solutions Llc Dba Warren Pumps) and 5 more.

What NSN replaces 3120-00-082-5968?

There are 9 known substitutes for 3120-00-082-5968: 4330-00-155-8205, 5133-00-189-9304, 6220-00-266-8058 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of HH21?

Key specifications for HH21: Material Document and Classification: QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Corner Shape: SQUARE INSIDE LEFT CORNER; Corner Shape: CHAMFERED OUTSIDE RIGHT CORNER; Corner Shape: SQUARE INSIDE RIGHT CORNER. 14 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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