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31HCS18PC22 — NUT,IMPELLER

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

31HCS18PC22: NUT,IMPELLER.

The NUT,IMPELLER is a the manufacturer industrial component. Key specifications include part_name_assigned_by_controlling_agency: NAVY SPECIAL PROJECT. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-787-8879, 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
31HCS18PC22
NSN: 5310-00-787-8879
FSC: 5310 — Nuts and Washers
CAGE: 43491 — GENERAL SIGNAL CORP (USA)
SPECIFICATIONS
general_characteristics_item_descriptionCRES,2.688 IN. OD,1.250 IN. H,THD FEMALE 0.625 IN. 11 UNC THD SIZE,0.750 IN. THD LG,WITH 0.125 IN. W BY 0.250 IN. DP SLOT ON TOP IN
part_name_assigned_by_controlling_agencyNAVY SPECIAL PROJECT
NSN5310-00-787-8879
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 31HCS18PC22 · 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
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: CRES,2.688 IN. OD,1.250 IN. H,THD FEMALE 0.625 IN. 11 UNC THD SIZE,0.750 IN. THD LG,WITH 0.125 IN. W BY 0.250 IN. DP SLOT ON TOP IN
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONCRES,2.688 IN. OD,1.250 IN. H,THD FEMALE 0.625 IN. 11 UNC THD SIZE,0.750 IN. THD LG,WITH 0.125 IN. W BY 0.250 IN. DP SLOT ON TOP IN
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 2
31-10-298Reference document
Same NSN cross-reference
Reference document — Secondary reference
544-2162-235Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 31HCS18PC22?
31HCS18PC22 is a NUT,IMPELLER.
What parts can replace 31HCS18PC22?
There are 2 known substitutes for 31HCS18PC22: 31-10-298, 544-2162-235. Substitute compatibility should be verified for your specific system.
What is the NSN for 31HCS18PC22?
31HCS18PC22 is cataloged in the U.S. Government catalog under NSN 5310-00-787-8879. 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.