ASTM F844 Unhardened Plain Washers Specification

Unhardened Plain, Flat Washers used to provide increased bearing surface spacing and to prevent galling

ASTM F844 Plain Washers

ASTM F844 Specification covers round and miscellaneous shape steel plain (flat) washers furnished in an unhardened condition used to provide increased bearing surface spacing and to prevent galling. Unless otherwise specified, the washers are furnished with dimensions conforming to B18.22.1, Type A, Tables 1A and Tables 1B. Hardened washers for use with heat-treated structural bolts are covered by Specifications F436 and F436M. The washers shall be punched from hot-rolled, hot-rolled and pickled, or cold-rolled steel; or shall be machined from bar stock or tubing; or shall be forged at the manufacturer's option.

ASTM F844 Dimensions, Mass, and Permissible Variations

Outside Diameter, inches Out of Flat, inches, maximum
0.500 and less 0.007
0.5625 through 1.250 0.010
over 1.250 0.015

ASTM F844 Bolting Surface Treatment Specifications

ASTM F844 Bolting Components Marking

Product Shall be Marked with our manufacturing trade mark "TorqBolt" or "TB" along with the designated Grade.
Grade and manufacturer’s identification symbols shall be applied to one end of studs and to the heads of bolts and screws of all sizes. (If the available area is inadequate, the grade symbol may be marked on one end and the manufacturer’s identification symbol marked on the other end.) For bolts and screws smaller than 1⁄4 in. [6 mm] in diameter and studs smaller than 3⁄8 in. [10 mm] in diameter and for 1⁄4 in. [6 mm] in diameter studs requiring more than a total of three symbols, the marking shall be a matter of agreement between the purchaser and the manufacturer.

ASME Dimensional Standards

B18.22.1 Plain Washers
B18.24 Part Identifying Number (PIN) Code System Standard for B18 Fastener Products

ASTM F844 Bolting Certifications

  • EN 10204 3.1
  • EN 10204 3.2
  • PED 2014/68/EC
  • MERKBLATT AD 2000 W2/W7/W10
  • API 20 E BSL 1/ BSL 2
  • NACE MR 0175
  • NACE MR 0103