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128047-1 — CLAMP,SYNCHRO

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

128047-1: CLAMP,SYNCHRO.

The CLAMP,SYNCHRO is a the manufacturer industrial component. Key specifications include width: 2.980 INCHES MINIMUM AND 3.020 INCHES MAXIMUM IN, length: 3.600 INCHES MINIMUM AND 3.640 INCHES MAXIMUM IN, material: STEEL CORROSION RESISTING, hole_diameter: 0.600 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-684-8858, 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
128047-1
NSN: 5310-00-684-8858
NIINs: 006848858, 010463694
FSC: 5310 — Nuts and Washers
CAGE: 80064 — NAVAL SHIP SYSTEMS COMMAND (USA)
SPECIFICATIONS
width2.980 INCHES MINIMUM AND 3.020 INCHES MAXIMUM IN
length3.600 INCHES MINIMUM AND 3.640 INCHES MAXIMUM IN
materialSTEEL CORROSION RESISTING
hole_diameter0.600 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN
NSN5310-00-684-8858
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 128047-1 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
WIDTH ACROSS FLATS: 0.553 INCHES MINIMUM AND 0.565 INCHES MAXIMUM IN
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THREAD SERIES: UNF
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THREAD DIRECTION: RIGHT-HAND
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NOMINAL THREAD SIZE: 0.375 INCHES IN
•
LOCKING FEATURE: PREVAILING TORQUE WITH NONMETALLIC INSERT
•
NUT HEIGHT: 0.489 INCHES NOMINAL IN
•
BALL SEAT RADIUS: 0.385 INCHES NOMINAL IN
•
SURFACE TREATMENT: CADMIUM AND PHOSPHATE NUT
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.553 INCHES MINIMUM AND 0.565 INCHES MAXIMUM IN
THREAD SERIESUNF
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.375 INCHES IN
LOCKING FEATUREPREVAILING TORQUE WITH NONMETALLIC INSERT
NUT HEIGHT0.489 INCHES NOMINAL IN
BALL SEAT RADIUS0.385 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM AND PHOSPHATE NUT
NUT STYLESINGLE BALL SEAT, HEXAGON
THREAD CLASS3B
SUBSTITUTES & CROSS-REFERENCES 2
12NE2935-064Reference document
Same NSN cross-reference
Reference document — Secondary reference
4188873-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 128047-1?
128047-1 is a CLAMP,SYNCHRO.
What parts can replace 128047-1?
There are 2 known substitutes for 128047-1: 12NE2935-064, 4188873-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 128047-1?
128047-1 is cataloged in the U.S. Government catalog under NSN 5310-00-684-8858. 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.