F436 Flat Washers PTFE

• Material: Alloy Steel
• Grade: A
• Certification: ISO, CE
• Customized: Customized
• Steel Grade: 3.6\4.6\4.8\5.6\6.8\8.8\9.8\10.9\12.9
• Transport Package: Playwood Box, Wooden Case
• Model NO.: F436
• Trademark: C&N
• Origin: China
• Production Capacity: 100tons/Month

Product Description

F436 Flat Washer, Te-flon

ASTM F436 thru hardened structural flat washers are used under bolt heads or nuts to increase the bearing surface area, or to offer protection so that the nut or bolt can be rotated without distortion of the bearing surface. They are designed for general purpose and structural use with bolts, nuts, studs, and other internally and externally threaded fasteners. Dimensional specifications are governed by ASTM F436. Dimensionally comparable to the low carbon SAE Washer, but manufactured from a higher grade of steel and heat treated. F436 washers are suitable for use with many fastener grades including B7, B16, L7, and A325 and A490 structural bolts. Also used with fasteners covered in A354 and A449. PTFE coating (commonly referred to as Te-flon) is formulated with superior characteristics for maximum fastener life. Technical components include a tensile strength of up to 4,000 psi and an operating pressure up to 100,000 psi. The absence of nut locking oxides enable easy and safe removal. PTFE coatings have extreme chemical resistance and are ideal for applications including insulating piping, boiler rooms, water filled piping, water lines and more.

 

ASTM F436 Structural Washers

ASTM F436 Structural Type 1

Available in 1/2″ through 2″ bolt sizes as outlined in ASTM F436. Complete certifications are standard with F436 structural product, which includes material grade (chemistry) and hardness. Wrought requires certification from its vendors that steel used to manufacture washers is melted and manufactured in the U.S. All sizes are stocked in plain, mechanical galvanized and hot-dipped galvanized.

 

Bolt Size	Outside Diameter	Inside Diameter	Thickness	Approx Lbs per M Pcs	Approx Pcs per Carton
1/2	1.063	.531	.097/.177	20.0	2,500
5/8	1.313	.688	.122/.177	35.0	1,250
3/4	1.469	.813	.122/.177	41.2	1,125
7/8	1.750	.938	.136/.177	71.0	625
1	2.000	1.063	.136/.177	93.8	500
1-1/8	2.250	1.188	.136/.177	120	375
1-1/4	2.500	1.375	.136/.177	144	300
1-3/8	2.750	1.531	.136/.177	174	275
1-1/2	3.000	1.625	.136/.177	208	250
1-5/8	3.250	1.770	.178/.280	311	150
1-3/4	3.375	1.875	.178/.280	328	130
1-7/8	3.500	2.000	.178/.280	345	135
2	3.750	2.125	.178/.280	398	100
2-1/4	4.000	2.407	.240/.340	568	60
2-1/2	4.500	2.657	.240/.340	734	30
2-3/4	5.000	2.907	.240/.340	921	30
3	5.500	3.157	.240/.340	1129	30

ASTM F436 Structural Type 3 Weathering

Available in 5/8″ through 1-1/4″ bolt sizes to weathering specification as outlined in ASTM F436. Wrought requires certification from its vendors that steel used to manufacture washers is melted and manufactured in the U.S.

Bolt Size	Outside Diameter	Inside Diameter	Thickness	Approx Lbs per M Pcs	Approx Pcs per Carton
5/8	1.313	.688	.122/.177	41.0	1250
3/4	1.469	.813	.122/.177	50.0	1125
7/8	1.750	.938	.136/.177	72.0	625
1	2.0000	1.063	.136/.177	93.8	500
1-1/8	2.250	1.188	.136/.177	116	375
1-1/4	2.500	1.375	.136/.177	144	300
1-1/2	3.000	1.656	.136/.177	206	250

 

Beveled Structural Washers

Available in 1/2″ through 1″ bolt sizes as outlined in ASTM F436. Wrought requires certification from its vendors that steel used to manufacture washers is melted and manufactured in the U.S. All sizes are stocked in plain, mechanical galvanized and hot-dipped galvanized.

Bolt Size	Outside Diameter	Slope	Approx Lbs per M Pcs	Approx Pcs per Carton
1/2	1.750	16-2/3%	251	200
5/8	1.750	16-2/3%	237	250
3/4	1.750	16-2/3%	224	250
7/8	1.750	16-2/3%	209	250
1	1.750	16-2/3%	181	250

 

5/16″ Thick Hardened Structural Washers

Hardened structural washers are used for special construction applications. 1″ through 1-1/2″ bolt sizes are stocked and sold with full product certifications.

Bolt Size	Outside Diameter	Inside Diameter	Thickness	Approx Lbs per M Pcs	Approx Pcs per Carton
1	2.000	1.063	.312	196	250
1-1/8	2.250	1.188	.312	252	200
1-1/4	2.500	1.375	.312	303	175
1-1/2	3.000	1.625	.312	442	80

• ASTM F436 Structural Washers
• Split Lock Washers
• Mil-Carb MC® Grade 8 Washers
• Heavy Duty Mil-Carb (MC®)
• Extra Thick Mil-Carb (MCx®)
• USS Grade 2 Washers
• SAE Grade 2 Washers
• Fender Washers
• U-Bolt Washers
• Dock Washers
• Type B Washers
• Auto

FAQ'S
1.What is Xylan?
Xylan is a family of fluoropolymer coatings designed by Whitford to provide corrosion protection, lubrication, wear resistance and non-stick properties in a variety industries and applications.  it have below benefits
Anti-Rust. In a ASTM B-117 Salt Spray test the coating remains resistant up to 3900 hours before red rust occurs.
Sustainability. As we are working towards a circular economy, PTFE coated fasteners are more sustainable then regular bolts due to their longer durability.
Lower maintenance costs. Longer durability of bolts does not only result in more sustainability but also lower maintenance costs.
Low torque friction coefficient. Due to the TEF-LON top layer, torque friction is low.
Added value. Using colored bolts into the colored frame work, valve, flange or heat exchanger gives your product extra added value.

3 How do you apply Xylan Coating?
 STEP ONE: Applying a base-coat such as Phosphate, Zinc, Zinc-Nickel, Hot Dip Galvanized or Xylar 1. The base coat has an average thickness of 10-15µ (except for HDG).
STEP TWO: Glass-shot blasting to roughen the surface of the fasteners to be coated.
STEP THREE: Having fasteners coated with PTFE Xylan 1070 or Xylan 1424 in the required color. See the table below for the top coat most suited to for your situation.
STEP FOUR: Heat treatment of the coated fasteners is performed.
4.Is Xylan the same as Te-flon?
No. Xylan and Te-flon are both brands of PTFE (Polytetrafluoroethylene) coatings. Although some Xylan and Te-flon products may have similar properties, it is important not to assume they will do the same job as there are variations of each product which are suitable for different applications and environments.

5.Is Xylan suitable for fasteners?
Yes. Amongst the Xylan range are a series of fastener-class coating systems designed to improve the performance and longevity of all types, sizes and grades of fasteners through its excellent corrosion resistant and low-friction properties. Xylan can be applied via dip-spin and spray methods, meaning it is suitable for small screws right through to large stud bolts.

6.What is Xylan Blue?
Xylan actually comes in a wide range of colours but is often referred to as "Xylan Blue" or "PTFE Blue" in reference to coating B7 Stud Bolts and Nuts for the Petrochemical industry. Generally, the product required will be Xylan 1424 or Xylan 1070 however its always best to clarify with the end user or consult technical advice direct from Whitford or your preferred applicator to confirm.

7.What are the addtional coating type you can  supply?
Zinc + Fluorocarbon / PTFE
Cadmium + Fluorocarbon /PTFE
Zinc Nickel + Fluorocarbon /PTFE
Zinc Plating + Xylan 1424 Blue
Xylar 2 + Xylan 1070 Blue
Xylar 2 + xylar 101 coated stud bolt

8.How to order the fluorocarbon coated stud bolts?
Example#1,
Stud Bolt 5/8″x80mm + 2 Heavy Hex Nuts ASME B18.2.1/B18.2.2/B1.1  Cl.2A/2B ASTM A 193 Gr.B7 - A 194 Gr.2H Fluorocarbon Coated blue color
Stud Bolts B7 c/ w 2Nuts 2H Fluoro Carbon Coated ASTM A 193 Gr.B7 - A194 - Gr.2H
Stud Bolts B7 c/ w 2Nuts 2H Black ASTM A 193 Gr.B7 - A194 - Gr.2H