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N405P11B11 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

N405P11B11: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include hole_diameter: 0.255 INCHES MINIMUM AND 0.263 INCHES MAXIMUM IN, hardness_rating: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM, outside_diameter: 0.489 INCHES MAXIMUM IN, style_designator: SPLIT HELICAL-RIGHT HAND, surface_treatment: PHOSPHATE OVERALL, material_thickness: 0.062 INCHES MINIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-274-8715, 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
N405P11B11
NSN: 5310-00-274-8715
NIINs: 002748715, 013380322
FSC: 5310 — Nuts and Washers
CAGE: 63743 — WARD LEONARD CT LLC (USA)
SPECIFICATIONS
hole_diameter0.255 INCHES MINIMUM AND 0.263 INCHES MAXIMUM IN
hardness_rating45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
outside_diameter0.489 INCHES MAXIMUM IN
style_designatorSPLIT HELICAL-RIGHT HAND
surface_treatmentPHOSPHATE OVERALL
material_thickness0.062 INCHES MINIMUM IN
nondefinitive_spec/std_dataA CLASS AND 2 STYLE
surface_treatment_document_and_classificationMIL-P-16232 TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-274-8715
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: N405P11B11 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-P-16232 TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
HARDNESS RATING: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: SPLIT HELICAL-RIGHT HAND
•
OUTSIDE DIAMETER: 0.489 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.062 INCHES MINIMUM IN
•
NONDEFINITIVE SPEC/STD DATA: A CLASS AND 2 STYLE
•
SURFACE TREATMENT: PHOSPHATE OVERALL
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-P-16232 TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORSPLIT HELICAL-RIGHT HAND
OUTSIDE DIAMETER0.489 INCHES MAXIMUM IN
MATERIAL THICKNESS0.062 INCHES MINIMUM IN
NONDEFINITIVE SPEC/STD DATAA CLASS AND 2 STYLE
SURFACE TREATMENTPHOSPHATE OVERALL
END ITEM IDENTIFICATIONW/S:STREAM (STD. TENSIONED REPLENISHMENT AT SEA METHOD); AIRCRAFT, C-2A (REPREOCURED); VEHICLE, AIRCRAFT REFUELER R-14; TEST CONSOLES, MINI-SACE; SUPPORT EQUIPMENT, B-1 AIRCRAFT; TELETYPE, MODEL 28; HELICOPTER, MH-53E; MACHINE GUN, .50 CAL, M2, HB, FLEX & HVYTT FIXED; AIRCRAFT (AC-130H, MC-130H, EC-130E, HC-130); MRAP RG-33 AND RG-33 AUV; MULTIPLE LAUNCH ROCKET SYSTEM (MLRS) A
MATERIALSTEEL COMP 1060 OR STEEL COMP 1561 OR STEEL COMP 1064 OR STEEL COMP 1065 OR STEEL COMP 1566 OR STEEL COMP 1069 OR STEEL COMP 1070 OR STEEL COMP 1572 OR STEEL COMP 1074 OR STEEL COMP 1075 OR STEEL COMP 1080 OVERALL
HOLE DIAMETER0.255 INCHES MINIMUM AND 0.263 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 9
10424432Reference document
Same NSN cross-reference
Reference document — Informative reference only
S115109Reference document
Same NSN cross-reference
Reference document — Secondary reference
GP34805S2Reference document
Same NSN cross-reference
Reference document — Secondary reference
2HK503Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
115109Reference document
Same NSN cross-reference
Reference document — Secondary reference
XX002-0697Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is N405P11B11?
N405P11B11 is a WASHER,LOCK.
What parts can replace N405P11B11?
There are 9 known substitutes for N405P11B11: 10424432, S115109, GP34805S2 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for N405P11B11?
N405P11B11 is cataloged in the U.S. Government catalog under NSN 5310-00-274-8715. 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.