Socket Head Cap Screws · SKU28
ASME B18.3 Inch Socket Head Cap Screws
ASME B18.3 (inch-series socket head cap screw)
ASME B18.3 Inch Socket Head Cap Screws is supplied to your specification for importers, distributors and OEMs. Final dimensions, material, grade, finish and supply terms require quotation confirmation.
Product specifications, quantities and delivery requirements are reviewed individually to prepare a tailored quotation.
Product overview
Industrial fastener sourcing for your application.
Socket-head screw inquiries combine head geometry, drive access, thread, strength and available clearance. A nominal diameter alone is not enough. ASME B18.3 Inch Socket Head Cap Screws is supplied to your specification for importers, distributors and OEMs. Final dimensions, material, grade, finish and supply terms require quotation confirmation. HEXVARO supplies it from production in Hebei and Anhui; certification documents and delivery are confirmed for each order.
Common application
inch-series equipment.
HEXVARO supplies this product from production in Hebei and Anhui, China. Reference MOQ 500 pcs per specification; lead time 10–15 days for stock items, 25–30 days for production.
Technical overview
Build a clear purchase specification.
Tell us which product configuration you need. A standard reference describes a product type; individual supply options are quoted against your request.
| RFQ field | What to specify |
|---|---|
| Reference MOQ | Reference MOQ: 500 pcs per specification (subject to quotation) |
| Product standard | ASME B18.3 (inch-series socket head cap screw) |
| Diameter, pitch & length | Include the required size, thread and length in your inquiry |
| Material & property class | State the required material specification and strength grade |
| Surface finish | Specify the coating or corrosion-protection requirement |
| Quantity & destination | Provide quantity per size, destination and packaging needs |
Key dimensions
ASME B18.3 inch socket head cap screw dimensions.
Head diameter and head height equal the nominal diameter times 1.5 and 1.0. Threads are UNC unless UNF is stated. Nominal values cross-checked against the published sources below; the governing standard edition and your drawing control the order.
| Size | Head Ø max | Head height max | Hex key | Inquiry |
|---|---|---|---|---|
| 1/4 | 0.375 | 0.250 | 3/16 | Quote this size |
| 5/16 | 0.469 | 0.312 | 1/4 | Quote this size |
| 3/8 | 0.562 | 0.375 | 5/16 | Quote this size |
| 1/2 | 0.750 | 0.500 | 3/8 | Quote this size |
| 5/8 | 0.938 | 0.625 | 1/2 | Quote this size |
| 3/4 | 1.125 | 0.750 | 5/8 | Quote this size |
| 1 | 1.500 | 1.000 | 3/4 | Quote this size |
Dimension sources Socket cap screw dimensions (AFT Fasteners) · Inch socket head cap screw dimension sheet (distributor PDF)
Packing, shipping and documents
| MOQ | 500 pcs per specification; mixed sizes can be combined on one order |
|---|---|
| Lead time | 10–15 days for stock items, 25–30 days for production orders, confirmed in the quotation |
| Export packing | Inner boxes or bags labelled by size, export cartons, then palletized and stretch-wrapped; buyer labels and barcodes on request |
| Shipping ports | Tianjin, Ningbo, Shanghai, Shenzhen |
| Incoterms | EXW, FOB, CFR, CIF, DAP, DDP on request |
| HS code reference | HS 7318.15 is the usual heading for socket head cap screws. Confirm the final code with your customs broker. |
| Certificate of origin | ACFTA Form E available on request for buyers in ASEAN countries such as Malaysia, Indonesia, Vietnam and the Philippines |
| Order documents | Commercial invoice, packing list and inspection records agreed in the quotation |
Common RFQ specifications
What buyers usually specify.
Typical size ranges, lengths, grades and finishes named in RFQs for this product type. This is a guide for writing the inquiry, not a stock list: each size, grade and finish is confirmed in the quotation.
| Sizes commonly quoted | #10 – 1 in, UNC (UNF on request) |
|---|---|
| Typical lengths | 1/2–6 in |
| Grades | ASTM A574 alloy steel; stainless ASTM F837 |
| Finishes | Black oxide, zinc plated, plain stainless |
Reference MOQ: 500 pcs per specification (subject to quotation). Sizes outside these ranges and quantities below 500 may still be submitted for review.
Applications & selection
Fit the fastener to the assembly.
Use these application contexts to help your engineering or purchasing team prepare a clear request.
- Machine frames
- Tooling and fixtures
- Industrial equipment
Use the reference examples as a starting point; confirm the exact revision, dimensions, material, finish and documents in the RFQ.
Your RFQ
Send the specification, not a shopping cart.
Share the part number or drawing, quantity and destination. We'll review the request and prepare a tailored quotation.
- Product name and exact standard / revision
- Diameter, length, thread, material and grade
- Surface finish and service conditions
- Quantity per item, packaging and required documents
Technical FAQ
Answers for industrial buyers.
Which head styles are available?
Cap (DIN 912 / ISO 4762), button head (ISO 7380) and countersunk (ISO 10642); inch-series per ASME B18.3.
What finishes are available?
Describe the finish and surface performance needed for the joint. Options are reviewed against the fastener material, dimensions and order conditions.
Are button-head and countersunk socket screws interchangeable with cap screws?
No. Head geometry and load or seating behaviour differ. The assembly drawing and clearance requirement control.
What does this page confirm?
It organizes a product-specific inquiry. Reference MOQ is 500 pcs per specification and lead time is 10–15 days for stock items or 25–30 days for production; price, certification documents and delivery are confirmed in your written quotation.
What should be stated with ASME B18.3 (inch series)?
State the exact revision, dimensions, material or grade, finish, quantity, destination and required documents. The inch-series route needs a clear UNC or UNF thread designation and must remain separate from metric dimensions.
Related products
Complete your fastener inquiry.
Socket Head Cap Screws · SKU28 inquiry
Have a part to source?
Send the controlled RFQ.
Product name, SKU, standard reference and source URL are carried into the form so you can edit the actual dimensions, material, grade, finish, quantity, destination and document requirements.
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