PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

999-78-10-18Washer,flat

Pima Valve, Llc · NSN 5310-01-531-7713 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-531-7713 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-531-7713. Primary manufacturer part number: 999-78-10-18.
Features
  • Washer,flat — FSC 5310
  • 3 verified cross-references
  • Primary manufacturer: Pima Valve, Llc
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Washer,flat, cataloged under National Stock Number 5310-01-531-7713, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Pima Valve, Llc. This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-531-7713
Primary Part Number999-78-10-18
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerPima Valve, Llc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5310-01-481-9100 INTERCHANGEABLE
Washer,flat
Cross-Reference Index
Part NumberManufacturer
999-78-10-18 Pima Valve, Llc (USA)
999-78-10-18 Hunt Valve Company, Inc. (USA)
803-1385637-10X-22 Naval Ship Systems Command (USA)
Related Parts
5310-01-481-9100INTERCHANGEABLE
WASHER,FLAT

Frequently Asked Questions

What is NSN 5310-01-531-7713?

NSN 5310-01-531-7713 is a Washer,flat, manufactured by Pima Valve, Llc, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-531-7713?

NSN 5310-01-531-7713 has 3 cross-referenced part numbers: 999-78-10-18 (Pima Valve, Llc), 999-78-10-18 (Hunt Valve Company, Inc.), 803-1385637-10X-22 (Naval Ship Systems Command).

What NSN replaces 5310-01-531-7713?

There is 1 known substitute for 5310-01-531-7713: 5310-01-481-9100. Verify interchangeability with system specifications before substitution.

What are the specifications of 999-78-10-18?

Key specifications for 999-78-10-18: End Item Identification: VALVE CHK SWG 10.00IPS 250PSI FLGE BRZ; Part Name Assigned by Controlling Agency: NAVY SPECIAL PROJECT. 2 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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