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4855B — WASHER,KEYWAY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

4855B: WASHER,KEYWAY.

The WASHER,KEYWAY is a the manufacturer industrial component. Key specifications include general_characteristics_item_description: FOLDING T-TYPE 4.000 IN. LG; 1.687 IN.

C TO C MTG FLANGE HOLES; 2 MTG FLANGE HOLES 0.375 IN. DIA IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-102-4660, 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
4855B
NSN: 5310-00-102-4660
NIINs: 001024660, 009923183
FSC: 5310 — Nuts and Washers
CAGE: 830Q4 — CURTISS-WRIGHT ELECTRO-MECHANICAL CORPORATION DBA CURTISS-WRIGHT STEAM AND AIR SOLUTIONS DIV STEAM AND AIR SOLUTIONS (USA)
SPECIFICATIONS
general_characteristics_item_descriptionFOLDING T-TYPE 4.000 IN. LG; 1.687 IN. C TO C MTG FLANGE HOLES; 2 MTG FLANGE HOLES 0.375 IN. DIA IN
NSN5310-00-102-4660
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4855B · 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
•
EXTERNAL KEYWAY WIDTH: 0.062 INCHES NOMINAL IN
•
EXTERNAL KEYWAY QUANTITY: 8
•
OUTSIDE DIAMETER: 2.272 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.063 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
HOLE DIAMETER: 1.185 INCHES NOMINAL IN
•
EXTERNAL KEYWAY LENGTH: 0.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
EXTERNAL KEYWAY WIDTH0.062 INCHES NOMINAL IN
EXTERNAL KEYWAY QUANTITY8
OUTSIDE DIAMETER2.272 INCHES NOMINAL IN
MATERIAL THICKNESS0.063 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT
MATERIALSTEEL OVERALL
HOLE DIAMETER1.185 INCHES NOMINAL IN
EXTERNAL KEYWAY LENGTH0.250 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 1
158572-904Reference 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 4855B?
4855B is a WASHER,KEYWAY.
What parts can replace 4855B?
There is 1 known substitute for 4855B: 158572-904. Substitute compatibility should be verified for your specific system.
What is the NSN for 4855B?
4855B is cataloged in the U.S. Government catalog under NSN 5310-00-102-4660. 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.