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1549403 — KEY,MACHINE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

1549403: KEY,MACHINE.

The KEY,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4140 OVERALL, overall_width: 1.593 INCHES NOMINAL IN, overall_height: 0.865 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN, overall_length: 2.0 INCHES NOMINAL IN, special_features: KEY MACHINE HAVING 13/16 THRU HOLE CENTERED AT 0.750 INCHES FROM WIDTH EDGE. IN, style_designator: PLAIN.

This part is cataloged in the U.S. Government catalog under NSN 5315-01-595-1378, 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
1549403
NSN: 5315-01-595-1378
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL COMP 4140 OVERALL
overall_width1.593 INCHES NOMINAL IN
overall_height0.865 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
overall_length2.0 INCHES NOMINAL IN
special_featuresKEY MACHINE HAVING 13/16 THRU HOLE CENTERED AT 0.750 INCHES FROM WIDTH EDGE. IN
style_designatorPLAIN
end_item_identificationMOUNT, GUN 1020-00-103-4780
part_name_assigned_by_controlling_agencyKEY, MACHINE
NSN5315-01-595-1378
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1549403 · 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
•
STYLE DESIGNATOR: PLAIN
•
MATERIAL: STEEL COMP 4140 OVERALL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.865 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
STYLE DESIGNATORPLAIN
OVERALL LENGTH2.0 INCHES NOMINAL IN
OVERALL WIDTH1.593 INCHES NOMINAL IN
SPECIAL FEATURESKEY MACHINE HAVING 13/16 THRU HOLE CENTERED AT 0.750 INCHES FROM WIDTH EDGE. IN
PART NAME ASSIGNED BY CONTROLLING AGENCYKEY, MACHINE
END ITEM IDENTIFICATIONMOUNT, GUN 1020-00-103-4780
MATERIALSTEEL COMP 4140 OVERALL
OTHER ITEMS IN FSC 5315 — Nails, Machine Keys, and Pins
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5315-00-000-1037 5315-00-000-1067 5315-00-000-1245 5315-00-000-1372 5315-00-000-1412 5315-00-001-1571 5315-00-001-1572 5315-00-001-1602
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1549403?
1549403 is a KEY,MACHINE.
What is the NSN for 1549403?
1549403 is cataloged in the U.S. Government catalog under NSN 5315-01-595-1378. 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.