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2618451P1 — WASHER,SHOULDERED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

2618451P1: WASHER,SHOULDERED.

The WASHER,SHOULDERED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4140 OVERALL, hole_diameter: 1.005 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN, hardness_rating: 40.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM, outside_diameter: 1.740 INCHES MINIMUM AND 1.760 INCHES MAXIMUM IN, style_designator: SHOULDERED, shoulder_diameter: 1.235 INCHES MINIMUM AND 1.265 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-018-1445, 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
2618451P1
NSN: 5310-01-018-1445
FSC: 5310 — Nuts and Washers
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL COMP 4140 OVERALL
hole_diameter1.005 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN
hardness_rating40.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
outside_diameter1.740 INCHES MINIMUM AND 1.760 INCHES MAXIMUM IN
style_designatorSHOULDERED
shoulder_diameter1.235 INCHES MINIMUM AND 1.265 INCHES MAXIMUM IN
surface_treatmentOXIDE FILM OVERALL
material_thickness0.110 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
material_document_and_classificationAISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-018-1445
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2618451P1 · 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
•
HARDNESS RATING: 40.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: SHOULDERED
•
MATERIAL DOCUMENT AND CLASSIFICATION: AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 1.740 INCHES MINIMUM AND 1.760 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.110 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
•
SHOULDER DIAMETER: 1.235 INCHES MINIMUM AND 1.265 INCHES MAXIMUM IN
•
COLOR: BLACK OVERALL
•
SURFACE TREATMENT: OXIDE FILM OVERALL
TECHNICAL CHARACTERISTICS
HARDNESS RATING40.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORSHOULDERED
MATERIAL DOCUMENT AND CLASSIFICATIONAISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER1.740 INCHES MINIMUM AND 1.760 INCHES MAXIMUM IN
MATERIAL THICKNESS0.110 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
SHOULDER DIAMETER1.235 INCHES MINIMUM AND 1.265 INCHES MAXIMUM IN
COLORBLACK OVERALL
SURFACE TREATMENTOXIDE FILM OVERALL
MATERIALSTEEL COMP 4140 OVERALL
HOLE DIAMETER1.005 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2618451P1?
2618451P1 is a WASHER,SHOULDERED.
What is the NSN for 2618451P1?
2618451P1 is cataloged in the U.S. Government catalog under NSN 5310-01-018-1445. 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.