PartsTable
Technical Data Sheet
21011A ✓ Verified by PartsTable
· NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The KEY,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, overall_width: 0.154 INCHES MINIMUM AND 0.158 INCHES MAXIMUM IN, overall_height: 0.220 INCHES MINIMUM AND 0.222 INCHES MAXIMUM IN, overall_length: 0.688 INCHES MINIMUM AND 0.719 INCHES MAXIMUM IN, hardness_rating: 352.0 BRINELL HULTGREN MINIMUM AND 375.0 BRINELL HULTGREN MAXIMUM OVERALL, special_features: TOP OF KEY RADIUS 0.077 IN. MIN 0.079 IN.

MAX FULL LG IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-276-4416, 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
21011A
NSN: 5315-00-276-4416
FSC: 5315
CAGE: 28265 — HERCULES ENGINE CO INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_width0.154 INCHES MINIMUM AND 0.158 INCHES MAXIMUM IN
overall_height0.220 INCHES MINIMUM AND 0.222 INCHES MAXIMUM IN
overall_length0.688 INCHES MINIMUM AND 0.719 INCHES MAXIMUM IN
hardness_rating352.0 BRINELL HULTGREN MINIMUM AND 375.0 BRINELL HULTGREN MAXIMUM OVERALL
special_featuresTOP OF KEY RADIUS 0.077 IN. MIN 0.079 IN. MAX FULL LG IN
style_designatorPLAIN
key_chamfer_angle25.0 DEGREES NOMINAL
key_chamfer_length0.016 INCHES NOMINAL IN
starting_edge_shapeCHAMFERED
NSN5315-00-276-4416
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 21011A · 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
KEY CHAMFER ANGLE: 25.0 DEGREES NOMINAL
STARTING EDGE SHAPE: CHAMFERED
MATERIAL: STEEL OVERALL
KEY CHAMFER LENGTH: 0.016 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL HEIGHT0.220 INCHES MINIMUM AND 0.222 INCHES MAXIMUM IN
KEY CHAMFER ANGLE25.0 DEGREES NOMINAL
OVERALL LENGTH0.688 INCHES MINIMUM AND 0.719 INCHES MAXIMUM IN
STARTING EDGE SHAPECHAMFERED
SPECIAL FEATURESTOP OF KEY RADIUS 0.077 IN. MIN 0.079 IN. MAX FULL LG IN
MATERIALSTEEL OVERALL
OVERALL WIDTH0.154 INCHES MINIMUM AND 0.158 INCHES MAXIMUM IN
KEY CHAMFER LENGTH0.016 INCHES NOMINAL IN
STYLE DESIGNATORPLAIN
HARDNESS RATING352.0 BRINELL HULTGREN MINIMUM AND 375.0 BRINELL HULTGREN MAXIMUM OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
2101-1Interchangeable
interchangeable cross-reference
interchangeable
MIL-C-5015Interchangeable
interchangeable cross-reference
interchangeable
MS3108B281PInterchangeable
interchangeable cross-reference
interchangeable
568-6Interchangeable
interchangeable cross-reference
interchangeable
SERIES150WELDINGInterchangeable
interchangeable cross-reference
interchangeable
B16.5Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21011A?
21011A is a KEY,MACHINE.
What parts can replace 21011A?
There are 27 known substitutes for 21011A: 2101-1, MIL-C-5015, MS3108B281P and 24 more. Substitute compatibility should be verified for your specific system.
Is 21011A still available?
21011A is currently cancelled.
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