PartsTable
Technical Data Sheet

N0405-1/4 — KEY,MACHINE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

N0405-1/4: KEY,MACHINE.

The KEY,MACHINE is a the manufacturer industrial component. Key specifications include overall_width: 0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN, overall_height: 0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN, overall_length: 1.312 INCHES NOMINAL1.312 INCHES NOMINAL IN, style_designator: PLAINPLAIN, end_item_identification: R18 FLP ASSEMBLYR18 FLP ASSEMBLY, part_name_assigned_by_controlling_agency: SQUARE KEYSTOCK 14" NOM. GRADE C1018 STEEL/SSTSQUARE KEYSTOCK 14" NOM.

GRADE C1018 STEEL/SST. This part is cataloged in the U.S. Government catalog under NSN 5315-01-374-4402, 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
N0405-1/4
NSN: 5315-01-374-4402
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 25567 — THE GORMAN-RUPP COMPANY DIV GORMAN-RUPP (USA)
SPECIFICATIONS
overall_width0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN
overall_height0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN
overall_length1.312 INCHES NOMINAL1.312 INCHES NOMINAL IN
style_designatorPLAINPLAIN
end_item_identificationR18 FLP ASSEMBLYR18 FLP ASSEMBLY
part_name_assigned_by_controlling_agencySQUARE KEYSTOCK 14" NOM. GRADE C1018 STEEL/SSTSQUARE KEYSTOCK 14" NOM. GRADE C1018 STEEL/SST
NSN5315-01-374-4402
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: N0405-1/4 · 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
•
STYLE DESIGNATOR: PLAINPLAIN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN
STYLE DESIGNATORPLAINPLAIN
OVERALL LENGTH1.312 INCHES NOMINAL1.312 INCHES NOMINAL IN
OVERALL WIDTH0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYSQUARE KEYSTOCK 14" NOM. GRADE C1018 STEEL/SSTSQUARE KEYSTOCK 14" NOM. GRADE C1018 STEEL/SST
END ITEM IDENTIFICATIONR18 FLP ASSEMBLYR18 FLP ASSEMBLY
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
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is N0405-1/4?
N0405-1/4 is a KEY,MACHINE.
What is the NSN for N0405-1/4?
N0405-1/4 is cataloged in the U.S. Government catalog under NSN 5315-01-374-4402. 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.