Bolts & Screws
Hexagon Flange Bolts
Hex bolt versatility with an integrated flange for vibration-prone applications.
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Flanged bearing surface spreads clamp load and resists loosening under vibration.
Manufactured to
Standards.
IFI-111Hex flange screw dimensions
ASTM A193 / A320High- and low-temperature bolting
ASME B1.1Unified inch screw threads
ISO 4014 / DIN 931Metric patterns on request
The buyer’s guide
What are hex flange bolts?
A hex flange bolt combines the hex head with a built-in conical washer flange. The flange spreads bearing load over soft or slotted material, resists embedment, and cuts a part number and an assembly step out of every joint.
- Integral flange — no separate washer
- Serrated flange available for vibration resistance
- Gr.5 / Gr.8 and stainless as standard
- Frame, chassis and equipment assembly
Other names
- Flange bolts
- Frame bolts
- Washer head bolts
Tips for purchasing
- Serrated or plain flange — serrations grip but mark the surface.
- Check flange OD against your bearing surface.
- Dimensions follow ASME B18.2.1 flange-bolt tables — our estimating team will confirm by size.
- Certs on request.
Available in
Materials.
A193 B7A193 B7MA540 B21–B24A193 B16A320 L7A320 L7MA320 L43A320 L7A/B/CA320 L70–L73A320 L1A193 B8 Class 1A193 B8 Class 2A193 B8M Class 1A193 B8M Class 2A320 B8 Class 1A320 B8 Class 2A320 B8M Class 1A320 B8M Class 2A320 B8F304 Stainless316 StainlessSAE Gr.5 / Gr.8A574Class 12.9F835F9124140434041424330V300M817M40 (EN24)F880F879F837F594 stainless nuts304L Stainless316L StainlessA193 B8T Class 1A193 B8T Class 2A320 B8T321 StainlessA193 B8C Class 1A193 B8C Class 2A320 B8C347 StainlessA193 B6410 Stainless416 Stainless17-4 PHF468 nonferrous boltsF467 nonferrous nutsInconel 718Inconel X-750Nimonic 80AInconel 725Incoloy 925Incoloy 825Incoloy 800H/HTMonel 400Monel K-500Duplex 2205Super Duplex 2507Zeron 100A193 B8RA193 B8SNitronic 50Nitronic 60A453 660
Representative capabilities — every item is manufactured or certified to your specification. Confirm requirements with our estimating team.
Applications
Vibration serviceRotating equipment
Ready when you are
Quote it in minutes.
Size rangeImperial 1/4" – 3/4" to IFI-111, larger to your drawing · Metric M6 – M100
Thread formsUNC · UNF · 8UN · Metric coarse & fine
ManufactureCold formed, hot forged & bar-stock machined
FinishesPTFE (blue/green), zinc, hot-dip galvanized, phosphate, plain
Need it to a drawing? Need it tonight?
24/7 hot-shot manufacturing · 832-446-3442