-
M8 Square Nut DIN 557 A4 Stainless Steel
In stockRRP From £4.27 -
M8 Square Nut, Thin Type DIN 562 A2 Stainless Steel
In stockRRP From £5.97 -
M8 Shear Nut A2 Stainless Steel
Out of stockRRP From £4.65 -
M8 Short Spring Channel Nut A4 Stainless Steel
In stockRRP From £7.98 -
M8 Shear Nut A4 Stainless Steel
In stockRRP From £19.79 -
M8 Prevailing Torque Nut A4 Stainless Steel
In stockRRP From £17.30 -
M8 Square Nut DIN 557 A2 Stainless Steel
In stockRRP From £4.35 -
M8 Self-Locking Counter Nut DIN 7967 A2 Stainless Steel
In stockRRP From £6.12 -
M8 Nylon Insert Nut DIN 985 A4-80 A4 Stainless Steel
Out of stockRRP From £10.22 -
M8 Prevailing Torque Nut A2 Stainless Steel
In stockRRP From £7.44 -
M8 Hexagon Weld Nut DIN 929 A4 Stainless Steel
In stockRRP From £4.78 -
M8 Nylon Insert Nut (Type P) DIN 982 A2 Stainless Steel
In stockRRP From £2.65 -
M8 Nylon Insert Nut (White Nylon) DIN 985 A2 Stainless Steel
In stockRRP From £6.88 -
M8 Hexagon Thin Nut ISO 4035-B A4 Stainless Steel
In stockRRP From £14.44 -
M8 Nylon Insert Nut (Type P) DIN 982 A4 Stainless Steel
In stockRRP From £5.39 -
M8 Hexagon Thin Nut DIN 439-B A2 Stainless Steel
In stockRRP From £4.47 -
M8 Hexagon Thin Nut DIN 439-B A4 Stainless Steel
In stockRRP From £7.79 -
M8 Hexagon Nut , Type B DIN 6330 A2 Stainless Steel
Out of stockRRP From £6.93 -
M8 Hexagon Nut , Type B DIN 6330 A4 Stainless Steel
In stockRRP From £16.23 -
M8 Hexagon Weld Nut DIN 929 A2 Stainless Steel
In stockRRP From £3.08 -
M8 Hexagon Thin Nut ISO 4035-B A2 Stainless Steel
In stockRRP From £5.91 -
M8 Hexagon Thin Nut DIN 439-B Left Hand Thread A2 Stainless Steel
In stockRRP From £5.83 -
M8 Hexagon Full Nut ISO 4032 A4-80 A4 Stainless Steel
In stockRRP From £15.35 -
M8 Hexagon Full Nut ISO 4032 A2 Stainless Steel
In stockRRP From £6.25 -
M8 Hexagon Full Nut DIN 934 Left Hand Thread A2 Stainless Steel
In stockRRP From £6.25
Stainless steel nuts in A2 (304) and A4 (316), from M1 to M64, plus imperial UNC, UNF, BSW, BSF and BA threads. A few sizes also come in duplex (1.4462) stainless.
- Hexagon nuts: full nuts to DIN 934 and ISO 4032, thin nuts to DIN 439 and ISO 4035, jam nuts, and left hand thread nuts.
- Locking nuts: nyloc (nylon insert) nuts to DIN 985 and DIN 982, all-metal prevailing torque nuts, castle nuts for split pins, and flange nyloc nuts.
- Dome nuts: domed cap nuts to DIN 1587 and domed nyloc nuts to DIN 986.
- Wing, flange and square nuts, including serrated and non-serrated flange nuts to DIN 6923.
- Specialist nuts: connector nuts for threaded rod, weld nuts, eye nuts, shear nuts, channel and cage nuts, T-nuts and sleeve nuts.
Use a full nut for general bolted joints, a locking nut where vibration could loosen it, and a dome nut to cover an exposed thread end.
Frequently asked questions
What is a nyloc nut?
A nyloc nut, also called a nylon insert lock nut, is a hex nut with a ring of nylon set into the top. The nylon grips the bolt thread and resists vibration that would loosen a plain nut over time. Simfix stocks nyloc nuts to DIN 985 and the taller DIN 982 in A2 (304) and A4 (316), from M2 to M36, plus flange and domed versions.
What is a dome nut used for?
A dome nut, made to DIN 1587, has a rounded cap that fully covers the end of the bolt thread. It gives a clean, snag-free finish on exposed threads and protects the thread tip. Simfix stocks dome nuts in A2 (304) from M3 to M30 and A4 (316) from M3 to M36, plus domed nyloc nuts (DIN 986) in A2.
What size nut fits an M8 bolt?
An M8 bolt takes an M8 nut; the number is the nominal thread diameter in millimetres, which matches across bolts, set screws and nuts of the same size. Standard metric nuts have a coarse thread, so check the pitch if your bolt has a fine thread. Simfix stocks M8 full, thin, nyloc, dome, flange, wing and castle nuts in both A2 (304) and A4 (316).
Should I use A2 or A4 nuts?
Use A2 (304) nuts for everyday indoor and general outdoor use. Use A4 (316) nuts near the coast, around pools or anywhere salt or chlorine is present, since A4 contains molybdenum, which resists chloride pitting that A2 does not. Match the nut grade to the bolt.
Sizes, grades and pack quantities vary by product type. Check the individual product listing for the exact specification and current availability.