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2637507-4 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

2637507-4: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 630 OVERALL, hole_diameter: 0.317 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN, heat_treatment: ANNEALED, surface_finish: 63.0 MICROINCHES TOP, hardness_rating: 36.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM, outside_diameter: 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-499-3458, 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
2637507-4
NSN: 5310-00-499-3458
FSC: 5310 — Nuts and Washers
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
materialSTEEL COMP 630 OVERALL
hole_diameter0.317 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
heat_treatmentANNEALED
surface_finish63.0 MICROINCHES TOP
hardness_rating36.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM
outside_diameter0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
style_designatorRECESSED BOTH SIDES
top_recess_angle45.0 DEGREES NOMINAL
material_thickness0.065 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN
bottom_recess_angle45.0 DEGREES NOMINAL
top_recess_diameter0.357 INCHES MINIMUM AND 0.362 INCHES MAXIMUM IN
bottom_recess_diameter0.357 INCHES MINIMUM AND 0.362 INCHES MAXIMUM IN
NSN5310-00-499-3458
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2637507-4 · 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
•
SURFACE FINISH: 63.0 MICROINCHES BOTTOM
•
TOP RECESS DIAMETER: 0.357 INCHES MINIMUM AND 0.362 INCHES MAXIMUM IN
•
BOTTOM RECESS DIAMETER: 0.357 INCHES MINIMUM AND 0.362 INCHES MAXIMUM IN
•
HEAT TREATMENT: ANNEALED
•
HARDNESS RATING: 36.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM
•
TOP RECESS ANGLE: 45.0 DEGREES NOMINAL
•
STYLE DESIGNATOR: RECESSED BOTH SIDES
TECHNICAL CHARACTERISTICS
SURFACE FINISH63.0 MICROINCHES BOTTOM
SURFACE FINISH63.0 MICROINCHES TOP
TOP RECESS DIAMETER0.357 INCHES MINIMUM AND 0.362 INCHES MAXIMUM IN
BOTTOM RECESS DIAMETER0.357 INCHES MINIMUM AND 0.362 INCHES MAXIMUM IN
HEAT TREATMENTANNEALED
HARDNESS RATING36.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM
TOP RECESS ANGLE45.0 DEGREES NOMINAL
STYLE DESIGNATORRECESSED BOTH SIDES
OUTSIDE DIAMETER0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
MATERIAL THICKNESS0.065 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 1
22033-1Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
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 2637507-4?
2637507-4 is a WASHER,RECESSED.
What parts can replace 2637507-4?
There is 1 known substitute for 2637507-4: 22033-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 2637507-4?
2637507-4 is cataloged in the U.S. Government catalog under NSN 5310-00-499-3458. This indicates validated use in U.S. government and defense supply chains.
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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.