Socket head cap screw product attributes

Socket head cap screws are sold in both inch and metric ranges that look nearly identical in a photo, so the record has to carry the thread system explicitly. Supplier files often mix M8-1.25 and 5/16-18 items in one sheet, list length without saying whether it is in millimeters or inches, and leave the dimensional standard implied. Those gaps are how a metric screw ends up in an inch bin.

Strength designations are the second trap. Alloy steel metric screws are usually Property Class 12.9, inch screws are commonly made to ASTM A574, and stainless screws use their own grades. These are not interchangeable labels for one thing, even when the strength levels are similar. Head diameter, head height and drive size also matter for counterbored holes and for choosing the right hex key.

Thread length and grip length decide whether the screw clamps properly or bottoms out. Longer screws are often partially threaded, and the unthreaded shank length varies with the standard. When plated high-strength screws are involved, buyers may also ask about hydrogen embrittlement relief, which is a process record that most supplier files do not include.

The socket head cap screws attribute template

18 candidate fields in 5 groups, ordered the way a record gets built: identify the item, capture its specifications, then record fit and the evidence behind any claim. 9 are marked Core: without them the item cannot be identified or filtered. Example values show the expected format only; they do not describe a real SKU.

Identity

Which exact item, variant and pack this record describes.

Check before use: Preserve leading zeros and punctuation, validate against the manufacturer record, and check the GTIN check digit and packaging level before linking.

Attribute	Type	Priority	Example format
Manufacturer Part Number manufacturer_part_number	Identifier	Core	SHCS-M8-40-129BO
Package Quantity package_quantity	Number · pcs	Core	100

Technical specifications

Measured or rated values that must travel with their unit and test conditions.

Check before use: Store the number and unit separately. Convert only when the source unit and test conditions are known.

Attribute	Type	Priority	Example format
Thread Size thread_size	Controlled list	Core	M8-1.25
Nominal Length nominal_length	Number · mm	Core	40 mm
Thread Length thread_length	Number · mm	Core	28 mm (reference)
Drive Size (Hex Key Across Flats) drive_size_hex_key_across_flats	Number · mm	Core	6 mm
Head Diameter head_diameter	Number · mm	Buyer decision	13.0 mm
Head Height head_height	Number · mm	Buyer decision	8.0 mm
Grip Length (Unthreaded Shank) grip_length_unthreaded_shank	Number · mm	Buyer decision	12 mm
Minimum Tensile Strength minimum_tensile_strength	Number · MPa	Buyer decision	1,220 MPa
Core Hardness core_hardness	Text · HRC	Buyer decision	39-44 HRC

Selection attributes

The type, material and option choices buyers filter and compare on.

Check before use: Map supplier wording to a governed vocabulary only after checking the source text and which variant it applies to.

Attribute	Type	Priority	Example format
Material material	Controlled list	Core	Alloy Steel
Property Class / Grade property_class_grade	Controlled list	Core	12.9
Finish / Coating finish_coating	Controlled list	Core	Black Oxide

Fit & compatibility

What the item mounts to, mates with, replaces or works alongside.

Check before use: Keep model and series qualifiers. A similar-looking part is not a verified fit until a source says so.

Attribute	Type	Priority	Example format
Thread Class / Tolerance thread_class_tolerance	Controlled list	Buyer decision	5g6g

Evidence & compliance

Listings, standards, classifications and origin claims that need a document behind them.

Check before use: Link the manufacturer document or label with its edition or date. Never copy a certification from a neighboring SKU.

Attribute	Type	Priority	Example format
Dimensional Standard dimensional_standard	Controlled list	Channel / evidence	ISO 4762 (DIN 912)
Material & Mechanical Spec material_mechanical_spec	Controlled list	Channel / evidence	ISO 898-1 Property Class 12.9
Country of Origin country_of_origin	Controlled list	Channel / evidence	Taiwan

Normalize supplier values

The same value arrives in many spellings. Map each raw string to one governed value, and keep the raw text beside it so a reviewer can see what the supplier actually wrote.

Often missing from supplier files

These fields are commonly absent from price lists and basic feeds, even though the information usually exists in a datasheet, label or installation manual. Treat an empty value as a request for evidence, not as permission to fill it from a similar model.

• Grip Length (Unthreaded Shank)
• Dimensional Standard
• Head Diameter and Head Height
• Hydrogen Embrittlement Relief
• Country of Melt

Questions the record must answer

Buyers and counter-sales reps choosing socket head cap screws ask questions like these. Each one needs a specific field, sourced for the exact variant.

• Is this M8 screw fully threaded at 40 mm, or does it have a plain shank?
• Which hex key size does this head take?
• Will the head fit a counterbore sized for ISO 4762?
• Is this 12.9 alloy steel or a stainless screw at a lower strength?

From supplier file to record

1. Resolve identity first. Link the supplier SKU, manufacturer part number and packaging identifiers without merging distinct variants or pack sizes.
2. Extract with the source attached. Pull values from rows, tables and datasheets, keeping the raw text, unit and page or row reference.
3. Map to your classification. Assign the ETIM, ECLASS, UNSPSC or internal class your company licenses, and keep the supplier's original terms.
4. Review, sync and watch. Hold conflicts and safety-related values for a category expert, write approved values to ERP or PIM, and recheck when the supplier sends a new file.

For the full method, see how to build a category attribute template and the category catalog gap audit.

FAQ