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6AX158 — WASHER,KEYWAY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

6AX158: WASHER,KEYWAY.

The WASHER,KEYWAY is a the manufacturer industrial component. Key specifications include hole_diameter: 0.876 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN, outside_diameter: 1.375 INCHES NOMINAL IN, special_features: KEYWAY 0.070 IN. DEEP IN, material_thickness: 0.187 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN, external_keyway_width: 0.188 INCHES NOMINAL IN, external_keyway_length: 0.497 INCHES NOMINAL IN.

This part is cataloged in the U.S. Government catalog under NSN 5310-00-451-0631, 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
6AX158
NSN: 5310-00-451-0631
FSC: 5310 — Nuts and Washers
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
hole_diameter0.876 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN
outside_diameter1.375 INCHES NOMINAL IN
special_featuresKEYWAY 0.070 IN. DEEP IN
material_thickness0.187 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN
external_keyway_width0.188 INCHES NOMINAL IN
external_keyway_length0.497 INCHES NOMINAL IN
end_item_identificationNSN 2320-01-097-0260 HEMTT (HEAVY EXPANDED MOBILITY TACTICAL TRUCK); 2320-01-304-2277 AND 2320-01-304-2278 PLS (PALLETIZED LOADING SYSTEM)
NSN5310-00-451-0631
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6AX158 · 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: 0.188 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 1.375 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.187 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN
•
HOLE DIAMETER: 0.876 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN
•
EXTERNAL KEYWAY LENGTH: 0.497 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
EXTERNAL KEYWAY WIDTH0.188 INCHES NOMINAL IN
OUTSIDE DIAMETER1.375 INCHES NOMINAL IN
MATERIAL THICKNESS0.187 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN
SPECIAL FEATURESKEYWAY 0.070 IN. DEEP IN
END ITEM IDENTIFICATIONNSN 2320-01-097-0260 HEMTT (HEAVY EXPANDED MOBILITY TACTICAL TRUCK); 2320-01-304-2277 AND 2320-01-304-2278 PLS (PALLETIZED LOADING SYSTEM)
HOLE DIAMETER0.876 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN
EXTERNAL KEYWAY LENGTH0.497 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 1
59225Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 6AX158?
6AX158 is a WASHER,KEYWAY.
What parts can replace 6AX158?
There is 1 known substitute for 6AX158: 59225. Substitute compatibility should be verified for your specific system.
What is the NSN for 6AX158?
6AX158 is cataloged in the U.S. Government catalog under NSN 5310-00-451-0631. 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.