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S638 — S638

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

S638: S638.

The S638 is a the manufacturer industrial component. Key specifications include material: STEEL, construction: ONE-PIECE, outside_diameter: 1.750 INCHES NOMINAL IN, style_designator: CIRCULAR, aperture_diameter: 1.141 INCHES NOMINAL IN, fsc_application_data: DRIVING AXLE PINION BEARING,TRUCK. This part is cataloged in the U.S.

Government catalog under NSN 5315-00-060-4584, 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
S638
NSN: 5315-00-060-4584
NIINs: 000604584, 004959588
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 14959 — CRANE CO DIV VALVE DIV (USA)
SPECIFICATIONS
materialSTEEL
constructionONE-PIECE
outside_diameter1.750 INCHES NOMINAL IN
style_designatorCIRCULAR
aperture_diameter1.141 INCHES NOMINAL IN
fsc_application_dataDRIVING AXLE PINION BEARING,TRUCK
NSN5315-00-060-4584
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: S638 · 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
•
CRITICALITY CODE JUSTIFICATION: ZZZY
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
TECHNICAL CHARACTERISTICS
CRITICALITY CODE JUSTIFICATIONZZZY
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSMATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
SUBSTITUTES & CROSS-REFERENCES 2
29967PC10Reference document
Same NSN cross-reference
Reference document — Secondary reference
30025PC10Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Demilitarization required (F)
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FREQUENTLY ASKED QUESTIONS
What is S638?
S638 is a S638.
What parts can replace S638?
There are 2 known substitutes for S638: 29967PC10, 30025PC10. Substitute compatibility should be verified for your specific system.
What is the NSN for S638?
S638 is cataloged in the U.S. Government catalog under NSN 5315-00-060-4584. 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.