5/16 unc stud 2.800"long with unf end 0.754"thread for nut. Using new hardware makes any job more pleasant. If you're servicing your cylinder head you should examine the rocker studs for signs of stretching or stripped threads. Two long ([link]51K885...

Zinc plated 5/16" UNF plain nut

The original Special Tuning head 8 port head by Jim Whitehouse is the ULTIMATE Push rod head for the "A"Series but is NOT A STRAIGHT BOLT ON PART.

It is supplied fully assembled with springs/top caps,Evo collets and utilizes the original siz...

The original Special Tuning head 8 port head by Jim Whitehouse is the ULTIMATE Push rod head for the "A"Series has now been revamped and made available with larger inlet valves and special seats available to special order.Ports and combustion chamber...

Mini Spares genuine upgraded part. Hexagon head rocker screw nut in EN24T.

Also available is a flanged nut C-AHT449

ARP Head stud kit that compromises of;

4 x Long Head Studs

7 x Short Head Studs (Disregard 2 if you're using a 9 stud application)

11 x Multipoint ARP nuts

11 x Heavy Duty Washers

4 x Rocker post studs <...

Complete stud, nut and washer kit for the cylinder head ancillaries. Kit contains parts to retain the following:

Inlet/Exhaust manifold to head, studs/nuts/washers

Thermostat housing (no sandwich plate) studs/nuts/washers

H...

Minispares own stainless steel manifold stud and 6 sided hexagon nut kit.

For mutipopint nut kit see C-STR287

Quantity required one kit per car

Water pump fitting kit for models without bypass facility, includes new bolts, washers and superseal gasket.

This thermostat housing fitting kit, suitable for all single tier thermostat housings. Comes with new studs, nuts, washers and Klinger thermostat housing gasket

later cars used this bolt to hold on the spin on filter head to the block-earlier cars used the CHS2613 stud--both are interchangeable

3/8"unc 1"long

Universal stud made for fitting the HS4/HIF carb to the manifold (except HS6 with alloy spacer on cast one piece manifold which requires CHS2515 (5.8mm longer)) and it also fits the cylinder head to take the thermostat housi...

There are 3 of these bolts fitted -1.75"long 5/16"UNF bolt ALTERNATIVE DAM7758.

Also used as longer bolt for water pump.

Also for the 21A1091 heavy duty tie rods on front suspension.