National Item Identification Number

01-441-2931

National Stock Number

Item Name

WASHER,FLAT

Federal Supply Class

5310

Description

A washer having a centrally located hole with a solid or laminated cross-section and two flat parallel bearing surfaces. The hole must be 75 percent or less than the largest dimension and the bearing surface finish is greater than 32 microinch (0.8 micrometer). The thickness cannot exceed 25 percent of the largest outside dimension. When the largest outside dimension is less than 1/4 inch or 6mm, the thickness must be 0.006 inches (0.15mm) or greater and for items 1/4 inch (6mm) or larger, the thickness must be 0.016 inches (0.4mm) or greater. The maximum tolerance is applied to dimensions and used as a determining factor. Items with separable lamination use SHIM. For items fabricated from ceramic or electrically rated materials by specification or industry standards use INSULATOR (1), WASHER. Excludes DISK, VALVE, graphite impregnated and lubricated items.

Commercial and Government Entity Code (Supplier Data)

---

09790

---

EATON AEROSPACE LLC
DBA STERER ENGINEERING DIV VALVE &
4690 COLORADO BOULEVARD
LOS ANGELES
CA
90039
440-954-5739

---

1PVC5

---

VACCO INDUSTRIES INC.
DBA VACCO INDUSTRIES INC. EL SEGUNDO
10350 VACCO STREET
SOUTH EL MONTE
CA
91733
626-450-6436

---

Reference Numbers (Part Numbers)

2731708
2731708

Required Categories

SPECIAL FEATURES
III END ITEM IDENTIFICATION

Required Description

MATERIAL STATES 300 SER CRES
2731703,EI271-042M4