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20A19-W-12 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

20A19-W-12: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include part_name_assigned_by_controlling_agency: WASHER,LOCK. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-186-0971, 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
20A19-W-12
NSN: 5310-00-186-0971
NIINs: 001860971, 014608271
FSC: 5310 — Nuts and Washers
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
part_name_assigned_by_controlling_agencyWASHER,LOCK
NSN5310-00-186-0971
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 20A19-W-12 · 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
•
INTERNAL PREBENT KEY WIDTH: 0.250 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
•
OVERALL DISTANCE INCLUDING KEYS: 3.344 INCHES MAXIMUM IN
•
HARDNESS RATING: 50.0 ROCKWELL B MINIMUM AND 81.0 ROCKWELL B MAXIMUM
•
STYLE DESIGNATOR: KEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD ALL MATERIAL RESPONSES OVERALL
•
OUTSIDE DIAMETER: 2.844 INCHES MINIMUM AND 2.874 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.058 INCHES MINIMUM AND 0.068 INCHES MAXIMUM IN
•
EXTERNAL KEY QUANTITY: 17
TECHNICAL CHARACTERISTICS
INTERNAL PREBENT KEY WIDTH0.250 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
OVERALL DISTANCE INCLUDING KEYS3.344 INCHES MAXIMUM IN
HARDNESS RATING50.0 ROCKWELL B MINIMUM AND 81.0 ROCKWELL B MAXIMUM
STYLE DESIGNATORKEY
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD ALL MATERIAL RESPONSES OVERALL
OUTSIDE DIAMETER2.844 INCHES MINIMUM AND 2.874 INCHES MAXIMUM IN
MATERIAL THICKNESS0.058 INCHES MINIMUM AND 0.068 INCHES MAXIMUM IN
EXTERNAL KEY QUANTITY17
INTERNAL PREBENT KEY LENGTH0.125 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN
EXTERNAL PREBENT KEY WIDTH0.204 INCHES MINIMUM AND 0.234 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 10
A997CPC30AReference document
Same NSN cross-reference
Reference document — Secondary reference
35518PC14Reference document
Same NSN cross-reference
Reference document — Secondary reference
D6991REVBPC33Reference document
Same NSN cross-reference
Reference document — Secondary reference
309447Reference document
Same NSN cross-reference
Reference document — Secondary reference
29276KPC14Reference document
Same NSN cross-reference
Reference document — Secondary reference
41-222-631PC99Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 20A19-W-12?
20A19-W-12 is a WASHER,LOCK.
What parts can replace 20A19-W-12?
There are 10 known substitutes for 20A19-W-12: A997CPC30A, 35518PC14, D6991REVBPC33 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 20A19-W-12?
20A19-W-12 is cataloged in the U.S. Government catalog under NSN 5310-00-186-0971. 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.