Nuts, bolts and washers
Since 1969, in Turin, we have been supplying standard and special nuts and bolts: hex head and 12-point (double hex) bolts, metric and inch nuts, ASTM A194 nuts for the petrochemical industry, self-locking and 12-point nuts, and flat, spring and lock washers. They are ready from stock or produced to the customer's drawing and specification.
Hex head bolts and 12-point bolts
ISO property classes
ISO 898-1 property classes 8.8, 10.9 and 12.9, with or without drilled head.
High temperature
ASTM A193 B16 vanadium steel, ASTM A453 Gr. 660 and A437 B4B high-temperature steels, AISI 410 martensitic stainless steel: bolts for turbines and power generation.
To drawing
Bolts to drawing in special steels and exotic materials, with matching nuts and washers. Special fasteners →
Hex nuts to ASTM A194
Metric high hex nuts UNI 5587 / DIN 934 H=D and heavy-series inch nuts to ANSI B18.2.2, matched to stud bolts for flanges and plants.
| In stock, plain finish | Sizes |
|---|---|
| A194 Gr. 2H, 2HM, 4, 7M | from M6 to M52 · from 1/4″-20UNC to 2″-8UN |
| A194 Gr. 8, 8M | up to M33 and 2″-8UN |
On request: A194 Gr. 8A, 8MA, 16 · A453 Gr. 660 · duplex and super duplex · UNS S20910 (Nitronic®).
Low temperatures
Gr. 4, Gr. 7 and Gr. 7M nuts, from diameter M16 / 5/8″ upwards, are certified for low temperatures with impact testing (Gr. 4L, 7L, 7ML) and are suitable for the oil & gas, petrochemical and cryogenic industries.
When the nut is not in the catalogue
Non-standard pitches
Metric fine pitch and UNF inch pitch.
12-point nuts
Also in self-locking versions, for high-strength joints.
Thin and cylindrical nuts
Lock nuts (jam nuts), cylindrical nuts, nuts with tommy-bar holes.
On request, nuts are supplied already treated against corrosion and galling, or with special coatings: see Coatings and treatments.
Metric, coarse pitch and fine pitch
Hex nuts
High UNI 5587 / DIN 934 H=D / ISO 4033 · regular UNI 5588 / DIN 934 / ISO 4032 · thin UNI 5589 / DIN 936 / 439 / ISO 4035.
Self-locking
High UNI 7473 / DIN 982 · thin UNI 7474 / DIN 985 · all-metal DIN 980/V.
Other types
Flange nuts (plain or serrated), slotted, square, wing, cap and cage nuts.
Materials: carbon steel ISO 898-2 cl. 8 and cl. 10 · stainless steel ISO 3506-2 A2 / A4 · brass. Good stock availability from M3 to M48.
Flat, spring and lock washers
- Flat UNI EN ISO 7089 (UNI 6592 – DIN 125) · large series UNI EN ISO 7093 (UNI 6953 – DIN 9021) · for structural steelwork EN 14399-6 – UNI 5714
- Plates: lock plates UNI 6599 – 6600 – 6601 · bearing plates UNI 6597 – 6598
- Spring: split (Grower) UNI 1751 – DIN 127 – DIN 7980 · toothed UNI 8842 A/J/V · wave UNI 8840 A/B (DIN 137 A/B) · serrated and conical UNI 8836 – 8837 – 8838
- Disc springs DIN 2093 · shim washers DIN 988 · self-locking washers for critical applications
Materials: carbon steel 100HV, 200HV, 300HV · stainless steel AISI 304 A2 and AISI 316 A4 · duplex and super duplex (S31803, S32760) · exotic alloys.
Which ASTM A194 nuts do you have in stock?
We stock Gr. 2H, 2HM, 4 and 7M in plain finish from M6 to M52 and from 1/4″-20UNC to 2″-8UN, and Gr. 8 and 8M up to M33 and 2″-8UN.
Do you have nuts for low temperatures?
Yes: Gr. 4, 7 and 7M nuts from diameter M16 / 5/8″ upwards are certified for low temperatures with impact testing (Gr. 4L, 7L, 7ML).
Do you produce nuts to drawing?
Yes: nuts with non-standard pitches, 12-point nuts including self-locking ones, thin nuts, cylindrical nuts and nuts with tommy-bar holes, made to the customer's drawing and specification.
Do you have nuts and washers in duplex and super duplex?
Yes: nuts and washers (on request) in duplex and super duplex (S31803, S32760), to match stud bolts and bolts in the same material.
Do you have nuts and bolts in stock in Turin?
Yes: we are at Strada del Francese 93, 10156 Turin, where we have a 2,500 m² warehouse with around 40,000 items ready for urgent orders. Telephone +39 011 47 03 103.