Alma Bolt Company & Prime Fasteners 1-800-526-2200

Home | Size / Thread Reference
Hex Head Cap | Hex Tap | Heavy Hex Head | Square Head | Carriage | Elevator | Step | T-Slot | Flanged | Counterbore | L-Anchor | Scraper Blade | Head Plow
Machine | Self-Tapping | Thread Cutting | Self-Drilling | Drywall & Framing | Construction | Wood Application | Security | Plastic Accessories
Cotter | Hair | Safety | Clevis | Taper | Dowel | Pull Dowel | Coiled Spring | Spring Roll | Lynch | Snapper | Hitch | Lanyards
Flat | Square Bevel | Star | Belleville | Lock | Bonded Sealing | Neoprene | Countersunk Finishing | Fender | Dock
Hex | Heavy Hex | Tee | T-Slot | Table Flanged | Acme Thread | Coupling | Castle | Square | Lock | Kep | Aluminum Binding Posts | Cold Forged Wing | Security
Wire Rope | Custom Assemblies | Super Slings | Thimbles | Clips | Swaging Sleeves | Swaging Stops | Swaging Tool
Stainless Steel | Hooks | Links | Rings | Load Binders | Cold Shuts | Double Clevis | Screw Pin Anchor | Chain Sling | Nylon Straps | Polyester RoundslingsT
Turnbuckles | Eye Bolts | U-Bolts | J-Bolts | S-Hooks | Adjustable Clevis Yokes | Steel Clevises
Hex Keys | Ball Drivers | Taps | Drills | Dies | Clamps | Electric Terminals | Nylon Wire Ties | Woodruff Keys | Key Stock Bars | Retaining Rings | Grease Fittings
Allenuts® | Head Cap Screws | Flat Head Cap Screws | Button Head Cap Screws | Set Screws | Hex Pressure Plugs | Shoulder Screws
Powdered Actuated Tools | Powder Actuated Pins | Mechanical Anchors | Adhesive Anchors | Masonry Drills | Core Bits | Powder Actuated Loads

Flat Washers

Standard Flat Washers

U.S. Standard (USS) and Society of Automotive Engineers (SAE) washers are stocked in plain and zinc plated finishes. The USS O.D., I.D. and thickness specifications are generally larger and thicker than SAE specifications. We offer a wide selection of USS and SAE washers in a variety of standard and exotic materials. If a standard washer does not meet your requirements, we can provide special dimension washers. See Specifications and Dimensions of USS and SAE Flat Washers. Also see the Combined Specifications and Dimensions Chart for USS and SAE Flat Washers.

 

Group codes represented: UFW, UFWZ, SFW, SFWZ
Part# examples: 50UFW, 75UFWZ, 62SFWZ

High Strength Heat Treated Flat Washers

Also known as 'Mil-Carb', these washers should be specified wherever high-strength hardened steel bolts are used. Fabricated from prime quality medium carbon steel. Through hardened (quenched and tempered) R/C 38-45 available from 1/4 - 2".

Group codes represented: FW8
Part# examples: 62UFW8Z, 125SFW8Z

Bolt Size (in.)
USS
SAE
Outside Dia. (in.)
Inside Dia. (in.)
Thickness
Outside Dia. (in.)
Inside Dia. (in.)
Thickness
1/4
3/4
5/16
.055/.072
5/8
9/32
.055/.072
5/16
7/8
3/8
.064/.080
11/16
11/32
.055/.072
3/8
1
7/16
.064/.080
13/16
13/32
.055/.072
7/16
1 1/4
1/2
.064/.080
59/64
15/32
.055/.072
1/2
1 3/8
9/16
.097/.121
1 1/16
17/32
.097/.121
9/16
1 1/2
5/8
.097/.121
1 3/16
19/32
.097/.121
5/8
1 3/4
21/32
.122/.146
1 5/16
21/32
.122/.146
3/4
2
13/16
.122/.146
1 15/32
13/16
.122/.146
7/8
2 1/4
15/16
.136/.160
1 3/4
15/16
.136/.160
1
2 1/2
1 1/16
.136/.160
2
1 1/16
.136/.160
1 1/8
2 3/4
1 1/4
.136/.160
2 1/4
1 1/4
.136/.160
1 1/4
3
1 3/8
.136/.160
2 1/2
1 3/8
.136/.160
1 3/8
3 1/4
1 1/2
.136/.160
2 3/4
1 1/2
.136/.160
1 1/2
3 1/2
1 5/8
.136/.160
3
1 5/8
.136/.160
1 3/4
....
....
....
3 3/8
1 7/8
.178/.201
2
....
....
....
3 3/4
2 1/8
.178/.201

A-325 Flat Washers (F-436)

For use with A-325 structural heavy hex head bolts and A-490 structural heavy hex head bolts, these washers meet ASTM F-436 specifications. Plain and hot dipped galvanized finishes available. Stocked in diameters from 1/2" to 1 1/2".

Group codes represented: A325FW
Part# examples: 37A325FW, 150A325FW

Bolt Size (in.)
Outside Dia. (in.)
Inside Dia. (in.)
Thickness
1/2
1 1/16
17/32
.097/.177
5/8
1 5/16
11/16
.122/.177
3/4
1 15/32
13/16
.122/.177
7/8
1 3/4
15/16
.136/.177
1
2
1 1/8
.136/.177
1 1/8
2 1/4
1 1/4
.136/.177
1 1/4
2 1/2
1 3/8
.136/.177
1 1/2
3
1 5/8
.136/.177

Thick Flat Washers

For use when extra thickness is needed or to reduce the risk of 'cupping'. These custom produced, Extra Thick Flat Washers come in various sizes from 1/4" to 1" bolt size. Standard USS & SAE, I.D./O.D. dimensions, but thickness range from 3/16" to 1/4".

Group codes represented: TFW
Part# examples: 62UTFW, 87STFW

About Us | Contact Us | ©2006 ABC Fastener Group, Inc.