PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

RLA21SM4(.0007)Washer,seat

Howmet Global Fastening Systems Inc Div Rosan Products · NSN 5310-00-403-0147 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-403-0147 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-403-0147. Primary manufacturer part number: RLA21SM4(.0007).
Features
  • Washer,seat — FSC 5310
  • 2 verified cross-references
  • Primary manufacturer: Howmet Global Fastening Systems Inc Div Rosan Products
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Washer,seat, cataloged under National Stock Number 5310-00-403-0147, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Howmet Global Fastening Systems Inc Div Rosan Products. This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameWasher,seat
FSC / FSG5310 — No Item Name Available (FSG 53)
ManufacturersHowmet Global Fastening Systems Inc Div Rosan Products (CAGE 83324)
Technical Specifications
ParameterValue
NSN5310-00-403-0147
Primary Part NumberRLA21SM4(.0007)
Item NameWasher,seat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerHowmet Global Fastening Systems Inc Div Rosan Products
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5315-00-291-5471 INTERCHANGEABLE
Pin,spring
Cross-Reference Index
Part NumberManufacturer
RLA21SM4-000 Howmet Global Fastening Systems Inc Div Rosan Products (USA)
RLA21SM4(.0007) PRIMARY Howmet Global Fastening Systems Inc Div Rosan Products (USA)
Related Parts
5315-00-291-5471INTERCHANGEABLE
PIN,SPRING

Frequently Asked Questions

What is NSN 5310-00-403-0147?

NSN 5310-00-403-0147 is a Washer,seat, manufactured by Howmet Global Fastening Systems Inc Div Rosan Products, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-403-0147?

NSN 5310-00-403-0147 has 2 cross-referenced part numbers: RLA21SM4-000 (Howmet Global Fastening Systems Inc Div Rosan Products), RLA21SM4(.0007) (Howmet Global Fastening Systems Inc Div Rosan Products).

What NSN replaces 5310-00-403-0147?

There is 1 known substitute for 5310-00-403-0147: 5315-00-291-5471. Verify interchangeability with system specifications before substitution.

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