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WPP172 — WASHER,KEYWAY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

WPP172: WASHER,KEYWAY.

The WASHER,KEYWAY is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 0.375 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN, outside_diameter: 0.995 INCHES MINIMUM AND 1.005 INCHES MAXIMUM IN, surface_treatment: ZINC AND CADMIUM OVERALL, material_thickness: 0.125 INCHES NOMINAL IN, external_keyway_width: 0.125 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-550-1499, 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
WPP172
NSN: 5310-00-550-1499
FSC: 5310 — Nuts and Washers
CAGE: 79172 — SIEMENS WATER TECHNOLOGIES CORP. DIV WALLACE & TIERNAN PRODUCTS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.375 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN
outside_diameter0.995 INCHES MINIMUM AND 1.005 INCHES MAXIMUM IN
surface_treatmentZINC AND CADMIUM OVERALL
material_thickness0.125 INCHES NOMINAL IN
external_keyway_width0.125 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
external_keyway_length0.125 INCHES NOMINAL IN
external_keyway_quantity1
NSN5310-00-550-1499
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: WPP172 · 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
•
EXTERNAL KEYWAY WIDTH: 0.125 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
•
EXTERNAL KEYWAY QUANTITY: 1
•
OUTSIDE DIAMETER: 0.995 INCHES MINIMUM AND 1.005 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.125 INCHES NOMINAL IN
•
SURFACE TREATMENT: ZINC AND CADMIUM OVERALL
•
MATERIAL: STEEL OVERALL
•
HOLE DIAMETER: 0.375 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN
•
EXTERNAL KEYWAY LENGTH: 0.125 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
EXTERNAL KEYWAY WIDTH0.125 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
EXTERNAL KEYWAY QUANTITY1
OUTSIDE DIAMETER0.995 INCHES MINIMUM AND 1.005 INCHES MAXIMUM IN
MATERIAL THICKNESS0.125 INCHES NOMINAL IN
SURFACE TREATMENTZINC AND CADMIUM OVERALL
MATERIALSTEEL OVERALL
HOLE DIAMETER0.375 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN
EXTERNAL KEYWAY LENGTH0.125 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 4
240646Reference document
Same NSN cross-reference
Reference document — Secondary reference
121276Reference document
Same NSN cross-reference
Reference document — Secondary reference
IVA583Reference document
Same NSN cross-reference
Reference document — Secondary reference
609181Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is WPP172?
WPP172 is a WASHER,KEYWAY.
What parts can replace WPP172?
There are 4 known substitutes for WPP172: 240646, 121276, IVA583 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for WPP172?
WPP172 is cataloged in the U.S. Government catalog under NSN 5310-00-550-1499. 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.