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21512771 — KEY,MACHINE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

21512771: KEY,MACHINE.

The KEY,MACHINE is a the manufacturer industrial component. Key specifications include special_features: DRIVE GEAR TO PINION KEY; 3/16 BY 3/16 BY 7/8 IN. IN, end_item_identification: GOVERNOR DRIVE AND LINKAGE FOR ALCO 251 DIESEL ENGINE.

This part is cataloged in the U.S. Government catalog under NSN 5315-01-086-0596, 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
21512771
NSN: 5315-01-086-0596
NIINs: 010860596, 014701803
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
special_featuresDRIVE GEAR TO PINION KEY; 3/16 BY 3/16 BY 7/8 IN. IN
end_item_identificationGOVERNOR DRIVE AND LINKAGE FOR ALCO 251 DIESEL ENGINE
NSN5315-01-086-0596
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 21512771 · 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
•
STARTING EDGE SHAPE: STRAIGHT
•
STYLE DESIGNATOR: PLAIN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: STEEL COMP 303 OVERALL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.1873 INCHES MINIMUM AND 0.1875 INCHES MAXIMUM IN
STARTING EDGE SHAPESTRAIGHT
STYLE DESIGNATORPLAIN
MATERIAL DOCUMENT AND CLASSIFICATIONAISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OVERALL LENGTH0.875 INCHES NOMINAL IN
OVERALL WIDTH0.1873 INCHES MINIMUM AND 0.1875 INCHES MAXIMUM IN
MATERIALSTEEL COMP 303 OVERALL
SUBSTITUTES & CROSS-REFERENCES 4
15-0375 PIECE 5Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
BD-9273-SKReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
DRP-16100 PC 13Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
15-3819 PC 5Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 21512771?
21512771 is a KEY,MACHINE.
What parts can replace 21512771?
There are 4 known substitutes for 21512771: 15-0375 PIECE 5, BD-9273-SK, DRP-16100 PC 13 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21512771?
21512771 is cataloged in the U.S. Government catalog under NSN 5315-01-086-0596. 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.