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91106A128 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

91106A128: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include hole_diameter: 6.4 MILLIMETERS NOMINAL MM, outside_diameter: 11.0 MILLIMETERS NOMINAL MM, special_features: ROCKWELL HARDNESS MINIMUM C35, style_designator: FLAT INTERNAL TEETH, material_thickness: 0.7 MILLIMETERS NOMINAL MM, end_item_identification: MRAP CAIMAN RWS. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-599-5091, 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
91106A128
NSN: 5310-01-599-5091
FSC: 5310 — Nuts and Washers
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
hole_diameter6.4 MILLIMETERS NOMINAL MM
outside_diameter11.0 MILLIMETERS NOMINAL MM
special_featuresROCKWELL HARDNESS MINIMUM C35
style_designatorFLAT INTERNAL TEETH
material_thickness0.7 MILLIMETERS NOMINAL MM
end_item_identificationMRAP CAIMAN RWS
part_name_assigned_by_controlling_agencyBLACK FINISH SPRING STEEL INTERNAL TOOTH LOCKWASHER
NSN5310-01-599-5091
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 91106A128 · 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: FLAT INTERNAL TEETH
•
OUTSIDE DIAMETER: 11.0 MILLIMETERS NOMINAL MM
•
MATERIAL THICKNESS: 0.7 MILLIMETERS NOMINAL MM
•
COLOR: BLACK OVERALL
•
HOLE DIAMETER: 6.4 MILLIMETERS NOMINAL MM
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORFLAT INTERNAL TEETH
OUTSIDE DIAMETER11.0 MILLIMETERS NOMINAL MM
MATERIAL THICKNESS0.7 MILLIMETERS NOMINAL MM
COLORBLACK OVERALL
SPECIAL FEATURESROCKWELL HARDNESS MINIMUM C35
PART NAME ASSIGNED BY CONTROLLING AGENCYBLACK FINISH SPRING STEEL INTERNAL TOOTH LOCKWASHER
END ITEM IDENTIFICATIONMRAP CAIMAN RWS
HOLE DIAMETER6.4 MILLIMETERS NOMINAL MM
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 91106A128?
91106A128 is a WASHER,LOCK.
What is the NSN for 91106A128?
91106A128 is cataloged in the U.S. Government catalog under NSN 5310-01-599-5091. 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.