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A1A156A103PC41 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

A1A156A103PC41: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include hole_diameter: 1.992 INCHES MINIMUM AND 2.017 INCHES MAXIMUM IN, hardness_rating: 50.0 ROCKWELL B MINIMUM AND 81.0 ROCKWELL B MAXIMUM, outside_diameter: 2.438 INCHES MINIMUM AND 2.468 INCHES MAXIMUM IN, style_designator: KEY, material_thickness: 0.053 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN, external_key_quantity: 17. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-186-0969, 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
A1A156A103PC41
NSN: 5310-00-186-0969
FSC: 5310 — Nuts and Washers
CAGE: 6X081 — COOPER INDUSTRIES INDUSTRIAL MACHINERY DIV (USA)
SPECIFICATIONS
materialSTEEL COMP 1010 OR STEEL COMP 1012 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OVERALL
hole_diameter1.992 INCHES MINIMUM AND 2.017 INCHES MAXIMUM IN
hardness_rating50.0 ROCKWELL B MINIMUM AND 81.0 ROCKWELL B MAXIMUM
outside_diameter2.438 INCHES MINIMUM AND 2.468 INCHES MAXIMUM IN
style_designatorKEY
material_thickness0.053 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN
external_key_quantity17
external_prebent_key_width0.204 INCHES MINIMUM AND 0.234 INCHES MAXIMUM IN
internal_prebent_key_width0.250 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
internal_prebent_key_length0.125 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN
overall_distance_including_keys2.922 INCHES MAXIMUM IN
NSN5310-00-186-0969
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A1A156A103PC41 · 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: 2.922 INCHES MAXIMUM IN
•
HARDNESS RATING: 50.0 ROCKWELL B MINIMUM AND 81.0 ROCKWELL B MAXIMUM
•
STYLE DESIGNATOR: KEY
•
OUTSIDE DIAMETER: 2.438 INCHES MINIMUM AND 2.468 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.053 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN
•
EXTERNAL KEY QUANTITY: 17
•
INTERNAL PREBENT KEY LENGTH: 0.125 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
INTERNAL PREBENT KEY WIDTH0.250 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
OVERALL DISTANCE INCLUDING KEYS2.922 INCHES MAXIMUM IN
HARDNESS RATING50.0 ROCKWELL B MINIMUM AND 81.0 ROCKWELL B MAXIMUM
STYLE DESIGNATORKEY
OUTSIDE DIAMETER2.438 INCHES MINIMUM AND 2.468 INCHES MAXIMUM IN
MATERIAL THICKNESS0.053 INCHES MINIMUM AND 0.063 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
MATERIALSTEEL COMP 1010 OR STEEL COMP 1012 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OVERALL
SUBSTITUTES & CROSS-REFERENCES 8
2HG156Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
CA35S41-095PC17WASHERReference document
Same NSN cross-reference
Reference document — Secondary reference
1607878PC20Reference document
Same NSN cross-reference
Reference document — Secondary reference
MILW21338TYPE1CLASS1SIZE10Reference document
Same NSN cross-reference
Reference document — Identification reference
18 Z 1D47Reference document
Same NSN cross-reference
Reference document — Secondary reference
W-10Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
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 A1A156A103PC41?
A1A156A103PC41 is a WASHER,KEY.
What parts can replace A1A156A103PC41?
There are 8 known substitutes for A1A156A103PC41: 2HG156, CA35S41-095PC17WASHER, 1607878PC20 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A1A156A103PC41?
A1A156A103PC41 is cataloged in the U.S. Government catalog under NSN 5310-00-186-0969. 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.