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98491A136 — KEY,MACHINE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

98491A136: KEY,MACHINE.

The KEY,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1018 OVERALL, overall_width: 0.250 INCHES NOMINAL IN, overall_height: 0.250 INCHES NOMINAL IN, overall_length: 12.000 INCHES NOMINAL IN, style_designator: PLAIN, surface_treatment: ZINC OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5315-01-127-3608, 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
98491A136
NSN: 5315-01-127-3608
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialSTEEL COMP 1018 OVERALL
overall_width0.250 INCHES NOMINAL IN
overall_height0.250 INCHES NOMINAL IN
overall_length12.000 INCHES NOMINAL IN
style_designatorPLAIN
surface_treatmentZINC OVERALL
starting_edge_shapeSTRAIGHT
end_item_identification3990-01-444-6174 BITUM DISTRIBUTOR
NSN5315-01-127-3608
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 98491A136 · 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
•
STARTING EDGE SHAPE: STRAIGHT
•
STYLE DESIGNATOR: PLAIN
•
SURFACE TREATMENT: ZINC OVERALL
•
MATERIAL: STEEL COMP 1018 OVERALL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.250 INCHES NOMINAL IN
STARTING EDGE SHAPESTRAIGHT
STYLE DESIGNATORPLAIN
OVERALL LENGTH12.000 INCHES NOMINAL IN
OVERALL WIDTH0.250 INCHES NOMINAL IN
SURFACE TREATMENTZINC OVERALL
END ITEM IDENTIFICATION3990-01-444-6174 BITUM DISTRIBUTOR
MATERIALSTEEL COMP 1018 OVERALL
SUBSTITUTES & CROSS-REFERENCES 3
4HB857Reference document
Same NSN cross-reference
Reference document — Secondary reference
08-06Reference document
Same NSN cross-reference
Reference document — Secondary reference
2640726Reference 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 98491A136?
98491A136 is a KEY,MACHINE.
What parts can replace 98491A136?
There are 3 known substitutes for 98491A136: 4HB857, 08-06, 2640726. Substitute compatibility should be verified for your specific system.
What is the NSN for 98491A136?
98491A136 is cataloged in the U.S. Government catalog under NSN 5315-01-127-3608. 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.