PartsTable TECHNICAL DATA SHEET

NSN 4540-01-219-5664Government record, cited

Disk, Interlocking, Breech and Flu4540-01-219-5664

NSN 4540-01-219-5664 · NIIN 012195664

FSC 4540 — Waste Disposal Equipment · FSG 45 — Plumbing, Heating, and Waste Disposal

Government record, cited

Also searched as 4540-01-219-5664 · 4540012195664 · NIIN 012195664 · 01-219-5664 · FSC 4540 Waste Disposal Equipment · SSN637-505-2143924 PIECE 6 · 77656-31X6 · 77656-31X6 PIECE 6 · SSN637-505-2143924

Nearby stock numbers ← 4540-01-219-5663 Plate, Slide, Flush Valve · 4540-01-219-5665 Bolt, Valve Actuator, Locking →

Features

Disk,interlocking,breech and Flu — FSC 4540
General Characteristics Item Description: NICKEL-ALUMINUM-BRONZE ALLOY; 1.249 IN. MAJOR DIA,1.074 IN. MIN DIA 10-SPLINE HOLE; TWO 0.250-20 IN. UNC CL 2B HOLES 0.500 IN. DP IN

Identification

NSN: 4540-01-219-5664
NIIN: 012195664
FSC: 4540 — Waste Disposal Equipment
FSG: 45 — Plumbing, Heating, and Waste Disposal

General Description

The Disk,interlocking,breech and Flu, cataloged under National Stock Number 4540-01-219-5664, is classified within Federal Supply Class 4540 (Waste Disposal Equipment) of the Plumbing, Heating, and Waste Disposal group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4540-01-219-5664
Item Name	Disk,interlocking,breech and Flu
FSC / FSG	4540 / 45 — Waste Disposal Equipment
Status	ACTIVE
General Characteristics Item Description	NICKEL-ALUMINUM-BRONZE ALLOY; 1.249 IN. MAJOR DIA,1.074 IN. MIN DIA 10-SPLINE HOLE; TWO 0.250-20 IN. UNC CL 2B HOLES 0.500 IN. DP IN

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

⇄ Related Items 4

Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.

3040-01-219-924477656-31X6 PIECE 7 POSSIBLE MATCH

SHAFT,SHOULDERED

Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat

3040-01-220-003477656-31X6 PIECE 10 POSSIBLE MATCH

SHAFT,STRAIGHT

Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat

3040-01-220-003677656-31X6 PIECE 13 POSSIBLE MATCH

SHAFT,SHOULDERED

Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat

3040-01-220-003977656-31X6 PIECE 14 POSSIBLE MATCH

SHAFT,SHOULDERED

Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat

Cross-Reference Index

No manufacturer part numbers on file in the U.S. Government catalog.

Reference documents

Reference	Meaning
SSN637-505-2143924 PIECE 6	5/2 Secondary reference U.S. Government activity
77656-31X6	D/9 Drawing number reference only U.S. Government activity
77656-31X6 PIECE 6	3/2 Design control — primary reference U.S. Government activity
SSN637-505-2143924	D/9 Drawing number reference only U.S. Government activity

Related Parts

3040-01-219-9244POSSIBLE MATCH

SHAFT,SHOULDERED

77656-31X6 PIECE 7

3040-01-220-0034POSSIBLE MATCH

SHAFT,STRAIGHT

77656-31X6 PIECE 10

3040-01-220-0036POSSIBLE MATCH

SHAFT,SHOULDERED

77656-31X6 PIECE 13

3040-01-220-0039POSSIBLE MATCH

SHAFT,SHOULDERED

77656-31X6 PIECE 14

Frequently Asked Questions

What is NSN 4540-01-219-5664?

NSN 4540-01-219-5664 is a Disk,interlocking,breech and Flu, classified under FSC 4540, Waste Disposal Equipment. Status: active.

What NSN replaces 4540-01-219-5664?

4 possible matches (shared part number, not a government interchangeability claim): 3040-01-219-9244, 3040-01-220-0034, 3040-01-220-0036. Verify interchangeability with system specifications before substitution.

What are the specifications of 4540-01-219-5664?

Key specifications for 4540-01-219-5664: General Characteristics Item Description: NICKEL-ALUMINUM-BRONZE ALLOY; 1.249 IN. MAJOR DIA,1.074 IN. MIN DIA 10-SPLINE HOLE; TWO 0.250-20 IN. UNC CL 2B HOLES 0.500 IN. DP IN. 1 specification is documented in the U.S. Government catalog.

Is NSN 4540-01-219-5664 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.

✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.

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