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7551-4 — CAP ASSEMBLY,PROTECTIVE,MUFFLER-

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

7551-4: CAP ASSEMBLY,PROTECTIVE,MUFFLER-.

CAP ASSEMBLY,PROTECTIVE,MUFFLER-. Key specifications include depth: 0.050 INCHES NOMINAL IN, width: 0.062 INCHES NOMINAL IN, material: STEEL COMP 416, bore_shape: STRAIGHT, drive_type: SLOTTED FACE, thread_size: 0.650-32. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-405-1803, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
7551-4
NSN: 4820-00-405-1803
NIINs: 004051803, 004528340, 004941941, 008165707, 009001027
FSC: 4820 — Valves, Nonpowered
CAGE: 97370 — SPX FLOW US, LLC DBA SPX VALVES & CONTROLS (USA)
SPECIFICATIONS
depth0.050 INCHES NOMINAL IN
width0.062 INCHES NOMINAL IN
materialSTEEL COMP 416
bore_shapeSTRAIGHT
drive_typeSLOTTED FACE
thread_size0.650-32
bore_diameter0.644 INCHES MINIMUM AND 0.650 INCHES MAXIMUM IN
beveled_threadNOT INCLUDED
chamfer_length0.020 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN
overall_length0.159 INCHES NOMINAL IN
thread_directionRIGHT-HAND
bore_edge_processCHAMFERED
NSN4820-00-405-1803
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 7551-4 · OEM ⚠ VERIFY BEFORE ORDERING Gate valves = FULL OPEN or FULL CLOSE only — never throttle. Partial opening causes seat erosion and vibration. ✓ BROKER TIP Rising stem shows valve position visually — easier maintenance. Non-rising stem saves headroom. PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
OUTSIDE DIAMETER: 11.500 INCHES NOMINAL IN
•
TAPER MINOR DIAMETER: 8.250 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SPECIAL SHAPED
•
TAPER MAJOR DIAMETER: 10.625 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.072 INCHES NOMINAL IN
•
BOLT HOLE QUANTITY: 12
•
BOLT CIRCLE DIAMETER: 10.825 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT1.250 INCHES NOMINAL IN
OUTSIDE DIAMETER11.500 INCHES NOMINAL IN
TAPER MINOR DIAMETER8.250 INCHES NOMINAL IN
STYLE DESIGNATORSPECIAL SHAPED
TAPER MAJOR DIAMETER10.625 INCHES NOMINAL IN
MATERIAL THICKNESS0.072 INCHES NOMINAL IN
BOLT HOLE QUANTITY12
BOLT CIRCLE DIAMETER10.825 INCHES NOMINAL IN
MATERIALRUBBER
HOLE DIAMETER0.350 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 7551-4?
7551-4 is a CAP ASSEMBLY,PROTECTIVE,MUFFLER-.
What is the NSN for 7551-4?
7551-4 is cataloged in the U.S. Government catalog under NSN 4820-00-405-1803. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.