Typical MOQ
10pieces
Subject to product and material review.
Conditions
MOQ is typically 10 pieces, subject to product, material and manufacturing-route review.
304 Hex Bolts — ASTM F593
Material304Change · 45 grades
- Material
- 304 · UNS S30400 · Stainless steel 304
- Material focus
- General-purpose corrosion resistance
- Common applications
- General industrial equipment
- Main elementstypical · wt.%
- Cr 18.1%
- Ni 8.1%
- C 0.04%
Standards & threads
Finished boltASTM F593Alloy Group 1 · 304 · CW · inch series
Specify 304 explicitly; the group also allows other alloys. Scope: nominal 1/4–1-1/2 in.; this is not a metric specification. Identify the exact alloy, condition and edition.
Cold work must be tied to the final bolt diameter and required properties.
Raw material specificationASTM A276/A276M / ASTM A479/A479MUNS S30400
S30400 · stainless bar
Select the stock-form specification and required condition. These are bar specifications, not finished-bolt strength classes.
Dimensions · metricISO 4014 / ISO 4017Coarse pitch · partial-thread bolts / full-thread hex screws
Dimensions · inchASME B18.2.1Inch hex bolts / hex cap screws
Select the bolt or cap-screw pattern, head dimensions and thread length. Hex and heavy hex are different choices.
Threads · metricISO 261 / ISO 965-1Metric M · pitch plan and tolerance system
Threads · UNC / UNFASME B1.1Unified inch · coarse / fine series
State diameter, TPI, series and external class: e.g. 1/2-13 UNC-2A or 1/2-20 UNF-2A. Select 2A / 3A with the mating-thread fit; UNC and UNF do not mate.
Sources & editions Reviewed 2026-10-19
Historical samples support the stated grade coverage. The ordered edition controls the full requirements.
Preview your dimensions
Example dimensions, not a stock size.
Simplified right-hand thread appearance. No tolerance, fit or standard compliance is simulated.
Head dimensions · optional
Head proportions are illustrative: s = 1.5d, k = 0.625d. They are not standard-table values and will not be submitted as specified dimensions.
Quality documents
Heat number traceability
Every delivery traceable by heat number
Mechanical testing
Included with every delivery
Thread inspection
GO / NO-GO gauging · sampled inspection
Methods, sampling and acceptance criteria follow the agreed specification. PMI, third-party inspection and additional records are agreed separately.
Before production and at delivery
During quotation, a redacted certificate from a previous order can show the document format and recorded tests. It is a historical example, not certification of this product or a new order. Shipment documents must correspond to the material and batch actually supplied.
How to read a historical certificate sample ↗Prepare your enquiry
Send a drawing and quantity.
No drawing? Use these details.
- Size
- d × L Diameter × under-head length
- Quantity
- Pieces Required quantity per size
- Thread
- Metric / UNC / UNF Pitch or TPI + thread class
- Coverage
- Full / Partial For partial, include threaded length
Full material checklist
Property class
S30400 plus the required finished-fastener standard and property class.
Separates alloy identity from mechanical acceptance.
Exposure and condition
Environment, delivery condition and any corrosion / finish requirement.
Avoids treating general stainless service as universal suitability.
Certificate designation
304 only or explicitly required 304 / 304L dual certification.
Makes the documentary acceptance clear before quotation.
Commercial terms
Indicative terms; confirmed in your quotation.
Sample review
~20days
Freight, import duties and taxes are separate.
Conditions
Samples are typically reviewed on an approximately 20-day basis. BYBOLT may cover agreed sample manufacturing; buyer freight, import duties and taxes remain separate.
Production review
25–35days
Urgent requirements can be discussed.
Conditions
Regular production is commonly reviewed on a 25–35 day basis. Urgent requirements can be discussed against the complete specification.
Typical deposit
30%
T/T or LianLian. Balance before dispatch.
Conditions
Payment can be arranged by T/T or LianLian. A typical order uses a 30% deposit, with the balance completed before dispatch.
Technical help
Does F593 Group 1 guarantee that the bolts are Type 304?
Group 1 contains several alloys. Specify 304 and S30400 explicitly when that is the required material, together with the condition and edition. This keeps the grade choice clear in the quotation and material records.
Can an F593 304 bolt callout be used unchanged for metric threads?
F593 is an inch-fastener specification. A metric order needs its own applicable finished-bolt acceptance basis in addition to the metric dimensions and thread class. Keep the stock identity and final worked condition explicit for either unit system.
Read a thread designation Metric / UNC / UNF
M12 × 1.75–6g12 mm diameter · 1.75 mm pitch · external class 6g
1/2-13 UNC-2A1/2 inch · 13 TPI · coarse · external class 2A
1/2-20 UNF-2A1/2 inch · 20 TPI · fine · external class 2A
Examples explain designations, not available sizes. Specify fine pitch explicitly. UNC and UNF do not mate; full or partial threading is a separate choice.
Thread classes and inspection ↗Related material guides
Download the PO and receiving checklist (PDF)
Guides for your enquiry
Specify your 304 bolt
Send a drawing or add your dimensions and quantity.
Continue to enquiry ↗
Combine several products in one enquiry
304 hex boltsEnquire ↗